| 1 |
!! |
| 2 |
!! Copyright (c) 2005 The University of Notre Dame. All Rights Reserved. |
| 3 |
!! |
| 4 |
!! The University of Notre Dame grants you ("Licensee") a |
| 5 |
!! non-exclusive, royalty free, license to use, modify and |
| 6 |
!! redistribute this software in source and binary code form, provided |
| 7 |
!! that the following conditions are met: |
| 8 |
!! |
| 9 |
!! 1. Acknowledgement of the program authors must be made in any |
| 10 |
!! publication of scientific results based in part on use of the |
| 11 |
!! program. An acceptable form of acknowledgement is citation of |
| 12 |
!! the article in which the program was described (Matthew |
| 13 |
!! A. Meineke, Charles F. Vardeman II, Teng Lin, Christopher |
| 14 |
!! J. Fennell and J. Daniel Gezelter, "OOPSE: An Object-Oriented |
| 15 |
!! Parallel Simulation Engine for Molecular Dynamics," |
| 16 |
!! J. Comput. Chem. 26, pp. 252-271 (2005)) |
| 17 |
!! |
| 18 |
!! 2. Redistributions of source code must retain the above copyright |
| 19 |
!! notice, this list of conditions and the following disclaimer. |
| 20 |
!! |
| 21 |
!! 3. Redistributions in binary form must reproduce the above copyright |
| 22 |
!! notice, this list of conditions and the following disclaimer in the |
| 23 |
!! documentation and/or other materials provided with the |
| 24 |
!! distribution. |
| 25 |
!! |
| 26 |
!! This software is provided "AS IS," without a warranty of any |
| 27 |
!! kind. All express or implied conditions, representations and |
| 28 |
!! warranties, including any implied warranty of merchantability, |
| 29 |
!! fitness for a particular purpose or non-infringement, are hereby |
| 30 |
!! excluded. The University of Notre Dame and its licensors shall not |
| 31 |
!! be liable for any damages suffered by licensee as a result of |
| 32 |
!! using, modifying or distributing the software or its |
| 33 |
!! derivatives. In no event will the University of Notre Dame or its |
| 34 |
!! licensors be liable for any lost revenue, profit or data, or for |
| 35 |
!! direct, indirect, special, consequential, incidental or punitive |
| 36 |
!! damages, however caused and regardless of the theory of liability, |
| 37 |
!! arising out of the use of or inability to use software, even if the |
| 38 |
!! University of Notre Dame has been advised of the possibility of |
| 39 |
!! such damages. |
| 40 |
!! |
| 41 |
|
| 42 |
module electrostatic_module |
| 43 |
|
| 44 |
use force_globals |
| 45 |
use definitions |
| 46 |
use atype_module |
| 47 |
use vector_class |
| 48 |
use simulation |
| 49 |
use status |
| 50 |
#ifdef IS_MPI |
| 51 |
use mpiSimulation |
| 52 |
#endif |
| 53 |
implicit none |
| 54 |
|
| 55 |
PRIVATE |
| 56 |
|
| 57 |
|
| 58 |
#define __FORTRAN90 |
| 59 |
#include "UseTheForce/DarkSide/fInteractionMap.h" |
| 60 |
#include "UseTheForce/DarkSide/fElectrostaticSummationMethod.h" |
| 61 |
#include "UseTheForce/DarkSide/fElectrostaticScreeningMethod.h" |
| 62 |
|
| 63 |
|
| 64 |
!! these prefactors convert the multipole interactions into kcal / mol |
| 65 |
!! all were computed assuming distances are measured in angstroms |
| 66 |
!! Charge-Charge, assuming charges are measured in electrons |
| 67 |
real(kind=dp), parameter :: pre11 = 332.0637778_dp |
| 68 |
!! Charge-Dipole, assuming charges are measured in electrons, and |
| 69 |
!! dipoles are measured in debyes |
| 70 |
real(kind=dp), parameter :: pre12 = 69.13373_dp |
| 71 |
!! Dipole-Dipole, assuming dipoles are measured in debyes |
| 72 |
real(kind=dp), parameter :: pre22 = 14.39325_dp |
| 73 |
!! Charge-Quadrupole, assuming charges are measured in electrons, and |
| 74 |
!! quadrupoles are measured in 10^-26 esu cm^2 |
| 75 |
!! This unit is also known affectionately as an esu centi-barn. |
| 76 |
real(kind=dp), parameter :: pre14 = 69.13373_dp |
| 77 |
|
| 78 |
!! variables to handle different summation methods for long-range |
| 79 |
!! electrostatics: |
| 80 |
integer, save :: summationMethod = NONE |
| 81 |
integer, save :: screeningMethod = UNDAMPED |
| 82 |
logical, save :: summationMethodChecked = .false. |
| 83 |
real(kind=DP), save :: defaultCutoff = 0.0_DP |
| 84 |
real(kind=DP), save :: defaultCutoff2 = 0.0_DP |
| 85 |
logical, save :: haveDefaultCutoff = .false. |
| 86 |
real(kind=DP), save :: dampingAlpha = 0.0_DP |
| 87 |
real(kind=DP), save :: alpha2 = 0.0_DP |
| 88 |
logical, save :: haveDampingAlpha = .false. |
| 89 |
real(kind=DP), save :: dielectric = 1.0_DP |
| 90 |
logical, save :: haveDielectric = .false. |
| 91 |
real(kind=DP), save :: constEXP = 0.0_DP |
| 92 |
real(kind=dp), save :: rcuti = 0.0_DP |
| 93 |
real(kind=dp), save :: rcuti2 = 0.0_DP |
| 94 |
real(kind=dp), save :: rcuti3 = 0.0_DP |
| 95 |
real(kind=dp), save :: rcuti4 = 0.0_DP |
| 96 |
real(kind=dp), save :: alphaPi = 0.0_DP |
| 97 |
real(kind=dp), save :: invRootPi = 0.0_DP |
| 98 |
real(kind=dp), save :: rrf = 1.0_DP |
| 99 |
real(kind=dp), save :: rt = 1.0_DP |
| 100 |
real(kind=dp), save :: rrfsq = 1.0_DP |
| 101 |
real(kind=dp), save :: preRF = 0.0_DP |
| 102 |
real(kind=dp), save :: preRF2 = 0.0_DP |
| 103 |
real(kind=dp), save :: f0 = 1.0_DP |
| 104 |
real(kind=dp), save :: f1 = 1.0_DP |
| 105 |
real(kind=dp), save :: f2 = 0.0_DP |
| 106 |
real(kind=dp), save :: f0c = 1.0_DP |
| 107 |
real(kind=dp), save :: f1c = 1.0_DP |
| 108 |
real(kind=dp), save :: f2c = 0.0_DP |
| 109 |
|
| 110 |
#ifdef __IFC |
| 111 |
! error function for ifc version > 7. |
| 112 |
double precision, external :: derfc |
| 113 |
#endif |
| 114 |
|
| 115 |
public :: setElectrostaticSummationMethod |
| 116 |
public :: setScreeningMethod |
| 117 |
public :: setElectrostaticCutoffRadius |
| 118 |
public :: setDampingAlpha |
| 119 |
public :: setReactionFieldDielectric |
| 120 |
public :: newElectrostaticType |
| 121 |
public :: setCharge |
| 122 |
public :: setDipoleMoment |
| 123 |
public :: setSplitDipoleDistance |
| 124 |
public :: setQuadrupoleMoments |
| 125 |
public :: doElectrostaticPair |
| 126 |
public :: getCharge |
| 127 |
public :: getDipoleMoment |
| 128 |
public :: destroyElectrostaticTypes |
| 129 |
public :: self_self |
| 130 |
public :: rf_self_excludes |
| 131 |
|
| 132 |
type :: Electrostatic |
| 133 |
integer :: c_ident |
| 134 |
logical :: is_Charge = .false. |
| 135 |
logical :: is_Dipole = .false. |
| 136 |
logical :: is_SplitDipole = .false. |
| 137 |
logical :: is_Quadrupole = .false. |
| 138 |
logical :: is_Tap = .false. |
| 139 |
real(kind=DP) :: charge = 0.0_DP |
| 140 |
real(kind=DP) :: dipole_moment = 0.0_DP |
| 141 |
real(kind=DP) :: split_dipole_distance = 0.0_DP |
| 142 |
real(kind=DP), dimension(3) :: quadrupole_moments = 0.0_DP |
| 143 |
end type Electrostatic |
| 144 |
|
| 145 |
type(Electrostatic), dimension(:), allocatable :: ElectrostaticMap |
| 146 |
|
| 147 |
contains |
| 148 |
|
| 149 |
subroutine setElectrostaticSummationMethod(the_ESM) |
| 150 |
integer, intent(in) :: the_ESM |
| 151 |
|
| 152 |
if ((the_ESM .le. 0) .or. (the_ESM .gt. REACTION_FIELD)) then |
| 153 |
call handleError("setElectrostaticSummationMethod", "Unsupported Summation Method") |
| 154 |
endif |
| 155 |
|
| 156 |
summationMethod = the_ESM |
| 157 |
|
| 158 |
end subroutine setElectrostaticSummationMethod |
| 159 |
|
| 160 |
subroutine setScreeningMethod(the_SM) |
| 161 |
integer, intent(in) :: the_SM |
| 162 |
screeningMethod = the_SM |
| 163 |
end subroutine setScreeningMethod |
| 164 |
|
| 165 |
subroutine setElectrostaticCutoffRadius(thisRcut, thisRsw) |
| 166 |
real(kind=dp), intent(in) :: thisRcut |
| 167 |
real(kind=dp), intent(in) :: thisRsw |
| 168 |
defaultCutoff = thisRcut |
| 169 |
rrf = defaultCutoff |
| 170 |
rt = thisRsw |
| 171 |
haveDefaultCutoff = .true. |
| 172 |
end subroutine setElectrostaticCutoffRadius |
| 173 |
|
| 174 |
subroutine setDampingAlpha(thisAlpha) |
| 175 |
real(kind=dp), intent(in) :: thisAlpha |
| 176 |
dampingAlpha = thisAlpha |
| 177 |
alpha2 = dampingAlpha*dampingAlpha |
| 178 |
haveDampingAlpha = .true. |
| 179 |
end subroutine setDampingAlpha |
| 180 |
|
| 181 |
subroutine setReactionFieldDielectric(thisDielectric) |
| 182 |
real(kind=dp), intent(in) :: thisDielectric |
| 183 |
dielectric = thisDielectric |
| 184 |
haveDielectric = .true. |
| 185 |
end subroutine setReactionFieldDielectric |
| 186 |
|
| 187 |
subroutine newElectrostaticType(c_ident, is_Charge, is_Dipole, & |
| 188 |
is_SplitDipole, is_Quadrupole, is_Tap, status) |
| 189 |
|
| 190 |
integer, intent(in) :: c_ident |
| 191 |
logical, intent(in) :: is_Charge |
| 192 |
logical, intent(in) :: is_Dipole |
| 193 |
logical, intent(in) :: is_SplitDipole |
| 194 |
logical, intent(in) :: is_Quadrupole |
| 195 |
logical, intent(in) :: is_Tap |
| 196 |
integer, intent(out) :: status |
| 197 |
integer :: nAtypes, myATID, i, j |
| 198 |
|
| 199 |
status = 0 |
| 200 |
myATID = getFirstMatchingElement(atypes, "c_ident", c_ident) |
| 201 |
|
| 202 |
!! Be simple-minded and assume that we need an ElectrostaticMap that |
| 203 |
!! is the same size as the total number of atom types |
| 204 |
|
| 205 |
if (.not.allocated(ElectrostaticMap)) then |
| 206 |
|
| 207 |
nAtypes = getSize(atypes) |
| 208 |
|
| 209 |
if (nAtypes == 0) then |
| 210 |
status = -1 |
| 211 |
return |
| 212 |
end if |
| 213 |
|
| 214 |
if (.not. allocated(ElectrostaticMap)) then |
| 215 |
allocate(ElectrostaticMap(nAtypes)) |
| 216 |
endif |
| 217 |
|
| 218 |
end if |
| 219 |
|
| 220 |
if (myATID .gt. size(ElectrostaticMap)) then |
| 221 |
status = -1 |
| 222 |
return |
| 223 |
endif |
| 224 |
|
| 225 |
! set the values for ElectrostaticMap for this atom type: |
| 226 |
|
| 227 |
ElectrostaticMap(myATID)%c_ident = c_ident |
| 228 |
ElectrostaticMap(myATID)%is_Charge = is_Charge |
| 229 |
ElectrostaticMap(myATID)%is_Dipole = is_Dipole |
| 230 |
ElectrostaticMap(myATID)%is_SplitDipole = is_SplitDipole |
| 231 |
ElectrostaticMap(myATID)%is_Quadrupole = is_Quadrupole |
| 232 |
ElectrostaticMap(myATID)%is_Tap = is_Tap |
| 233 |
|
| 234 |
end subroutine newElectrostaticType |
| 235 |
|
| 236 |
subroutine setCharge(c_ident, charge, status) |
| 237 |
integer, intent(in) :: c_ident |
| 238 |
real(kind=dp), intent(in) :: charge |
| 239 |
integer, intent(out) :: status |
| 240 |
integer :: myATID |
| 241 |
|
| 242 |
status = 0 |
| 243 |
myATID = getFirstMatchingElement(atypes, "c_ident", c_ident) |
| 244 |
|
| 245 |
if (.not.allocated(ElectrostaticMap)) then |
| 246 |
call handleError("electrostatic", "no ElectrostaticMap was present before first call of setCharge!") |
| 247 |
status = -1 |
| 248 |
return |
| 249 |
end if |
| 250 |
|
| 251 |
if (myATID .gt. size(ElectrostaticMap)) then |
| 252 |
call handleError("electrostatic", "ElectrostaticMap was found to be too small during setCharge!") |
| 253 |
status = -1 |
| 254 |
return |
| 255 |
endif |
| 256 |
|
| 257 |
if (.not.ElectrostaticMap(myATID)%is_Charge) then |
| 258 |
call handleError("electrostatic", "Attempt to setCharge of an atom type that is not a charge!") |
| 259 |
status = -1 |
| 260 |
return |
| 261 |
endif |
| 262 |
|
| 263 |
ElectrostaticMap(myATID)%charge = charge |
| 264 |
end subroutine setCharge |
| 265 |
|
| 266 |
subroutine setDipoleMoment(c_ident, dipole_moment, status) |
| 267 |
integer, intent(in) :: c_ident |
| 268 |
real(kind=dp), intent(in) :: dipole_moment |
| 269 |
integer, intent(out) :: status |
| 270 |
integer :: myATID |
| 271 |
|
| 272 |
status = 0 |
| 273 |
myATID = getFirstMatchingElement(atypes, "c_ident", c_ident) |
| 274 |
|
| 275 |
if (.not.allocated(ElectrostaticMap)) then |
| 276 |
call handleError("electrostatic", "no ElectrostaticMap was present before first call of setDipoleMoment!") |
| 277 |
status = -1 |
| 278 |
return |
| 279 |
end if |
| 280 |
|
| 281 |
if (myATID .gt. size(ElectrostaticMap)) then |
| 282 |
call handleError("electrostatic", "ElectrostaticMap was found to be too small during setDipoleMoment!") |
| 283 |
status = -1 |
| 284 |
return |
| 285 |
endif |
| 286 |
|
| 287 |
if (.not.ElectrostaticMap(myATID)%is_Dipole) then |
| 288 |
call handleError("electrostatic", "Attempt to setDipoleMoment of an atom type that is not a dipole!") |
| 289 |
status = -1 |
| 290 |
return |
| 291 |
endif |
| 292 |
|
| 293 |
ElectrostaticMap(myATID)%dipole_moment = dipole_moment |
| 294 |
end subroutine setDipoleMoment |
| 295 |
|
| 296 |
subroutine setSplitDipoleDistance(c_ident, split_dipole_distance, status) |
| 297 |
integer, intent(in) :: c_ident |
| 298 |
real(kind=dp), intent(in) :: split_dipole_distance |
| 299 |
integer, intent(out) :: status |
| 300 |
integer :: myATID |
| 301 |
|
| 302 |
status = 0 |
| 303 |
myATID = getFirstMatchingElement(atypes, "c_ident", c_ident) |
| 304 |
|
| 305 |
if (.not.allocated(ElectrostaticMap)) then |
| 306 |
call handleError("electrostatic", "no ElectrostaticMap was present before first call of setSplitDipoleDistance!") |
| 307 |
status = -1 |
| 308 |
return |
| 309 |
end if |
| 310 |
|
| 311 |
if (myATID .gt. size(ElectrostaticMap)) then |
| 312 |
call handleError("electrostatic", "ElectrostaticMap was found to be too small during setSplitDipoleDistance!") |
| 313 |
status = -1 |
| 314 |
return |
| 315 |
endif |
| 316 |
|
| 317 |
if (.not.ElectrostaticMap(myATID)%is_SplitDipole) then |
| 318 |
call handleError("electrostatic", "Attempt to setSplitDipoleDistance of an atom type that is not a splitDipole!") |
| 319 |
status = -1 |
| 320 |
return |
| 321 |
endif |
| 322 |
|
| 323 |
ElectrostaticMap(myATID)%split_dipole_distance = split_dipole_distance |
| 324 |
end subroutine setSplitDipoleDistance |
| 325 |
|
| 326 |
subroutine setQuadrupoleMoments(c_ident, quadrupole_moments, status) |
| 327 |
integer, intent(in) :: c_ident |
| 328 |
real(kind=dp), intent(in), dimension(3) :: quadrupole_moments |
| 329 |
integer, intent(out) :: status |
| 330 |
integer :: myATID, i, j |
| 331 |
|
| 332 |
status = 0 |
| 333 |
myATID = getFirstMatchingElement(atypes, "c_ident", c_ident) |
| 334 |
|
| 335 |
if (.not.allocated(ElectrostaticMap)) then |
| 336 |
call handleError("electrostatic", "no ElectrostaticMap was present before first call of setQuadrupoleMoments!") |
| 337 |
status = -1 |
| 338 |
return |
| 339 |
end if |
| 340 |
|
| 341 |
if (myATID .gt. size(ElectrostaticMap)) then |
| 342 |
call handleError("electrostatic", "ElectrostaticMap was found to be too small during setQuadrupoleMoments!") |
| 343 |
status = -1 |
| 344 |
return |
| 345 |
endif |
| 346 |
|
| 347 |
if (.not.ElectrostaticMap(myATID)%is_Quadrupole) then |
| 348 |
call handleError("electrostatic", "Attempt to setQuadrupoleMoments of an atom type that is not a quadrupole!") |
| 349 |
status = -1 |
| 350 |
return |
| 351 |
endif |
| 352 |
|
| 353 |
do i = 1, 3 |
| 354 |
ElectrostaticMap(myATID)%quadrupole_moments(i) = & |
| 355 |
quadrupole_moments(i) |
| 356 |
enddo |
| 357 |
|
| 358 |
end subroutine setQuadrupoleMoments |
| 359 |
|
| 360 |
|
| 361 |
function getCharge(atid) result (c) |
| 362 |
integer, intent(in) :: atid |
| 363 |
integer :: localError |
| 364 |
real(kind=dp) :: c |
| 365 |
|
| 366 |
if (.not.allocated(ElectrostaticMap)) then |
| 367 |
call handleError("electrostatic", "no ElectrostaticMap was present before first call of getCharge!") |
| 368 |
return |
| 369 |
end if |
| 370 |
|
| 371 |
if (.not.ElectrostaticMap(atid)%is_Charge) then |
| 372 |
call handleError("electrostatic", "getCharge was called for an atom type that isn't a charge!") |
| 373 |
return |
| 374 |
endif |
| 375 |
|
| 376 |
c = ElectrostaticMap(atid)%charge |
| 377 |
end function getCharge |
| 378 |
|
| 379 |
function getDipoleMoment(atid) result (dm) |
| 380 |
integer, intent(in) :: atid |
| 381 |
integer :: localError |
| 382 |
real(kind=dp) :: dm |
| 383 |
|
| 384 |
if (.not.allocated(ElectrostaticMap)) then |
| 385 |
call handleError("electrostatic", "no ElectrostaticMap was present before first call of getDipoleMoment!") |
| 386 |
return |
| 387 |
end if |
| 388 |
|
| 389 |
if (.not.ElectrostaticMap(atid)%is_Dipole) then |
| 390 |
call handleError("electrostatic", "getDipoleMoment was called for an atom type that isn't a dipole!") |
| 391 |
return |
| 392 |
endif |
| 393 |
|
| 394 |
dm = ElectrostaticMap(atid)%dipole_moment |
| 395 |
end function getDipoleMoment |
| 396 |
|
| 397 |
subroutine checkSummationMethod() |
| 398 |
|
| 399 |
if (.not.haveDefaultCutoff) then |
| 400 |
call handleError("checkSummationMethod", "no Default Cutoff set!") |
| 401 |
endif |
| 402 |
|
| 403 |
rcuti = 1.0d0 / defaultCutoff |
| 404 |
rcuti2 = rcuti*rcuti |
| 405 |
rcuti3 = rcuti2*rcuti |
| 406 |
rcuti4 = rcuti2*rcuti2 |
| 407 |
|
| 408 |
if (screeningMethod .eq. DAMPED) then |
| 409 |
if (.not.haveDampingAlpha) then |
| 410 |
call handleError("checkSummationMethod", "no Damping Alpha set!") |
| 411 |
endif |
| 412 |
|
| 413 |
if (.not.haveDefaultCutoff) then |
| 414 |
call handleError("checkSummationMethod", "no Default Cutoff set!") |
| 415 |
endif |
| 416 |
|
| 417 |
constEXP = exp(-alpha2*defaultCutoff*defaultCutoff) |
| 418 |
invRootPi = 0.56418958354775628695d0 |
| 419 |
alphaPi = 2.0d0*dampingAlpha*invRootPi |
| 420 |
f0c = derfc(dampingAlpha*defaultCutoff) |
| 421 |
f1c = alphaPi*defaultCutoff*constEXP + f0c |
| 422 |
f2c = alphaPi*2.0d0*alpha2*constEXP*rcuti2 |
| 423 |
|
| 424 |
endif |
| 425 |
|
| 426 |
if (summationMethod .eq. REACTION_FIELD) then |
| 427 |
if (haveDielectric) then |
| 428 |
defaultCutoff2 = defaultCutoff*defaultCutoff |
| 429 |
preRF = (dielectric-1.0d0) / & |
| 430 |
((2.0d0*dielectric+1.0d0)*defaultCutoff2*defaultCutoff) |
| 431 |
preRF2 = 2.0d0*preRF |
| 432 |
else |
| 433 |
call handleError("checkSummationMethod", "Dielectric not set") |
| 434 |
endif |
| 435 |
|
| 436 |
endif |
| 437 |
|
| 438 |
summationMethodChecked = .true. |
| 439 |
end subroutine checkSummationMethod |
| 440 |
|
| 441 |
|
| 442 |
subroutine doElectrostaticPair(atom1, atom2, d, rij, r2, sw, & |
| 443 |
vpair, fpair, pot, eFrame, f, t, do_pot) |
| 444 |
|
| 445 |
logical, intent(in) :: do_pot |
| 446 |
|
| 447 |
integer, intent(in) :: atom1, atom2 |
| 448 |
integer :: localError |
| 449 |
|
| 450 |
real(kind=dp), intent(in) :: rij, r2, sw |
| 451 |
real(kind=dp), intent(in), dimension(3) :: d |
| 452 |
real(kind=dp), intent(inout) :: vpair |
| 453 |
real(kind=dp), intent(inout), dimension(3) :: fpair |
| 454 |
|
| 455 |
real( kind = dp ) :: pot |
| 456 |
real( kind = dp ), dimension(9,nLocal) :: eFrame |
| 457 |
real( kind = dp ), dimension(3,nLocal) :: f |
| 458 |
real( kind = dp ), dimension(3,nLocal) :: felec |
| 459 |
real( kind = dp ), dimension(3,nLocal) :: t |
| 460 |
|
| 461 |
real (kind = dp), dimension(3) :: ux_i, uy_i, uz_i |
| 462 |
real (kind = dp), dimension(3) :: ux_j, uy_j, uz_j |
| 463 |
real (kind = dp), dimension(3) :: dudux_i, duduy_i, duduz_i |
| 464 |
real (kind = dp), dimension(3) :: dudux_j, duduy_j, duduz_j |
| 465 |
|
| 466 |
logical :: i_is_Charge, i_is_Dipole, i_is_SplitDipole, i_is_Quadrupole |
| 467 |
logical :: j_is_Charge, j_is_Dipole, j_is_SplitDipole, j_is_Quadrupole |
| 468 |
logical :: i_is_Tap, j_is_Tap |
| 469 |
integer :: me1, me2, id1, id2 |
| 470 |
real (kind=dp) :: q_i, q_j, mu_i, mu_j, d_i, d_j |
| 471 |
real (kind=dp) :: qxx_i, qyy_i, qzz_i |
| 472 |
real (kind=dp) :: qxx_j, qyy_j, qzz_j |
| 473 |
real (kind=dp) :: cx_i, cy_i, cz_i |
| 474 |
real (kind=dp) :: cx_j, cy_j, cz_j |
| 475 |
real (kind=dp) :: cx2, cy2, cz2 |
| 476 |
real (kind=dp) :: ct_i, ct_j, ct_ij, a0, a1 |
| 477 |
real (kind=dp) :: riji, ri, ri2, ri3, ri4 |
| 478 |
real (kind=dp) :: pref, vterm, epot, dudr, vterm1, vterm2 |
| 479 |
real (kind=dp) :: xhat, yhat, zhat |
| 480 |
real (kind=dp) :: dudx, dudy, dudz |
| 481 |
real (kind=dp) :: scale, sc2, bigR |
| 482 |
real (kind=dp) :: varEXP |
| 483 |
real (kind=dp) :: pot_term |
| 484 |
real (kind=dp) :: preVal, rfVal |
| 485 |
|
| 486 |
if (.not.allocated(ElectrostaticMap)) then |
| 487 |
call handleError("electrostatic", "no ElectrostaticMap was present before first call of do_electrostatic_pair!") |
| 488 |
return |
| 489 |
end if |
| 490 |
|
| 491 |
if (.not.summationMethodChecked) then |
| 492 |
call checkSummationMethod() |
| 493 |
endif |
| 494 |
|
| 495 |
#ifdef IS_MPI |
| 496 |
me1 = atid_Row(atom1) |
| 497 |
me2 = atid_Col(atom2) |
| 498 |
#else |
| 499 |
me1 = atid(atom1) |
| 500 |
me2 = atid(atom2) |
| 501 |
#endif |
| 502 |
|
| 503 |
!!$ if (rij .ge. defaultCutoff) then |
| 504 |
!!$ write(*,*) 'warning: rij = ', rij, ' rcut = ', defaultCutoff, ' sw = ', sw |
| 505 |
!!$ endif |
| 506 |
|
| 507 |
!! some variables we'll need independent of electrostatic type: |
| 508 |
|
| 509 |
riji = 1.0d0 / rij |
| 510 |
|
| 511 |
xhat = d(1) * riji |
| 512 |
yhat = d(2) * riji |
| 513 |
zhat = d(3) * riji |
| 514 |
|
| 515 |
!! logicals |
| 516 |
i_is_Charge = ElectrostaticMap(me1)%is_Charge |
| 517 |
i_is_Dipole = ElectrostaticMap(me1)%is_Dipole |
| 518 |
i_is_SplitDipole = ElectrostaticMap(me1)%is_SplitDipole |
| 519 |
i_is_Quadrupole = ElectrostaticMap(me1)%is_Quadrupole |
| 520 |
i_is_Tap = ElectrostaticMap(me1)%is_Tap |
| 521 |
|
| 522 |
j_is_Charge = ElectrostaticMap(me2)%is_Charge |
| 523 |
j_is_Dipole = ElectrostaticMap(me2)%is_Dipole |
| 524 |
j_is_SplitDipole = ElectrostaticMap(me2)%is_SplitDipole |
| 525 |
j_is_Quadrupole = ElectrostaticMap(me2)%is_Quadrupole |
| 526 |
j_is_Tap = ElectrostaticMap(me2)%is_Tap |
| 527 |
|
| 528 |
if (i_is_Charge) then |
| 529 |
q_i = ElectrostaticMap(me1)%charge |
| 530 |
endif |
| 531 |
|
| 532 |
if (i_is_Dipole) then |
| 533 |
mu_i = ElectrostaticMap(me1)%dipole_moment |
| 534 |
#ifdef IS_MPI |
| 535 |
uz_i(1) = eFrame_Row(3,atom1) |
| 536 |
uz_i(2) = eFrame_Row(6,atom1) |
| 537 |
uz_i(3) = eFrame_Row(9,atom1) |
| 538 |
#else |
| 539 |
uz_i(1) = eFrame(3,atom1) |
| 540 |
uz_i(2) = eFrame(6,atom1) |
| 541 |
uz_i(3) = eFrame(9,atom1) |
| 542 |
#endif |
| 543 |
ct_i = uz_i(1)*xhat + uz_i(2)*yhat + uz_i(3)*zhat |
| 544 |
|
| 545 |
if (i_is_SplitDipole) then |
| 546 |
d_i = ElectrostaticMap(me1)%split_dipole_distance |
| 547 |
endif |
| 548 |
|
| 549 |
endif |
| 550 |
|
| 551 |
if (i_is_Quadrupole) then |
| 552 |
qxx_i = ElectrostaticMap(me1)%quadrupole_moments(1) |
| 553 |
qyy_i = ElectrostaticMap(me1)%quadrupole_moments(2) |
| 554 |
qzz_i = ElectrostaticMap(me1)%quadrupole_moments(3) |
| 555 |
#ifdef IS_MPI |
| 556 |
ux_i(1) = eFrame_Row(1,atom1) |
| 557 |
ux_i(2) = eFrame_Row(4,atom1) |
| 558 |
ux_i(3) = eFrame_Row(7,atom1) |
| 559 |
uy_i(1) = eFrame_Row(2,atom1) |
| 560 |
uy_i(2) = eFrame_Row(5,atom1) |
| 561 |
uy_i(3) = eFrame_Row(8,atom1) |
| 562 |
uz_i(1) = eFrame_Row(3,atom1) |
| 563 |
uz_i(2) = eFrame_Row(6,atom1) |
| 564 |
uz_i(3) = eFrame_Row(9,atom1) |
| 565 |
#else |
| 566 |
ux_i(1) = eFrame(1,atom1) |
| 567 |
ux_i(2) = eFrame(4,atom1) |
| 568 |
ux_i(3) = eFrame(7,atom1) |
| 569 |
uy_i(1) = eFrame(2,atom1) |
| 570 |
uy_i(2) = eFrame(5,atom1) |
| 571 |
uy_i(3) = eFrame(8,atom1) |
| 572 |
uz_i(1) = eFrame(3,atom1) |
| 573 |
uz_i(2) = eFrame(6,atom1) |
| 574 |
uz_i(3) = eFrame(9,atom1) |
| 575 |
#endif |
| 576 |
cx_i = ux_i(1)*xhat + ux_i(2)*yhat + ux_i(3)*zhat |
| 577 |
cy_i = uy_i(1)*xhat + uy_i(2)*yhat + uy_i(3)*zhat |
| 578 |
cz_i = uz_i(1)*xhat + uz_i(2)*yhat + uz_i(3)*zhat |
| 579 |
endif |
| 580 |
|
| 581 |
if (j_is_Charge) then |
| 582 |
q_j = ElectrostaticMap(me2)%charge |
| 583 |
endif |
| 584 |
|
| 585 |
if (j_is_Dipole) then |
| 586 |
mu_j = ElectrostaticMap(me2)%dipole_moment |
| 587 |
#ifdef IS_MPI |
| 588 |
uz_j(1) = eFrame_Col(3,atom2) |
| 589 |
uz_j(2) = eFrame_Col(6,atom2) |
| 590 |
uz_j(3) = eFrame_Col(9,atom2) |
| 591 |
#else |
| 592 |
uz_j(1) = eFrame(3,atom2) |
| 593 |
uz_j(2) = eFrame(6,atom2) |
| 594 |
uz_j(3) = eFrame(9,atom2) |
| 595 |
#endif |
| 596 |
ct_j = uz_j(1)*xhat + uz_j(2)*yhat + uz_j(3)*zhat |
| 597 |
|
| 598 |
if (j_is_SplitDipole) then |
| 599 |
d_j = ElectrostaticMap(me2)%split_dipole_distance |
| 600 |
endif |
| 601 |
endif |
| 602 |
|
| 603 |
if (j_is_Quadrupole) then |
| 604 |
qxx_j = ElectrostaticMap(me2)%quadrupole_moments(1) |
| 605 |
qyy_j = ElectrostaticMap(me2)%quadrupole_moments(2) |
| 606 |
qzz_j = ElectrostaticMap(me2)%quadrupole_moments(3) |
| 607 |
#ifdef IS_MPI |
| 608 |
ux_j(1) = eFrame_Col(1,atom2) |
| 609 |
ux_j(2) = eFrame_Col(4,atom2) |
| 610 |
ux_j(3) = eFrame_Col(7,atom2) |
| 611 |
uy_j(1) = eFrame_Col(2,atom2) |
| 612 |
uy_j(2) = eFrame_Col(5,atom2) |
| 613 |
uy_j(3) = eFrame_Col(8,atom2) |
| 614 |
uz_j(1) = eFrame_Col(3,atom2) |
| 615 |
uz_j(2) = eFrame_Col(6,atom2) |
| 616 |
uz_j(3) = eFrame_Col(9,atom2) |
| 617 |
#else |
| 618 |
ux_j(1) = eFrame(1,atom2) |
| 619 |
ux_j(2) = eFrame(4,atom2) |
| 620 |
ux_j(3) = eFrame(7,atom2) |
| 621 |
uy_j(1) = eFrame(2,atom2) |
| 622 |
uy_j(2) = eFrame(5,atom2) |
| 623 |
uy_j(3) = eFrame(8,atom2) |
| 624 |
uz_j(1) = eFrame(3,atom2) |
| 625 |
uz_j(2) = eFrame(6,atom2) |
| 626 |
uz_j(3) = eFrame(9,atom2) |
| 627 |
#endif |
| 628 |
cx_j = ux_j(1)*xhat + ux_j(2)*yhat + ux_j(3)*zhat |
| 629 |
cy_j = uy_j(1)*xhat + uy_j(2)*yhat + uy_j(3)*zhat |
| 630 |
cz_j = uz_j(1)*xhat + uz_j(2)*yhat + uz_j(3)*zhat |
| 631 |
endif |
| 632 |
|
| 633 |
epot = 0.0_dp |
| 634 |
dudx = 0.0_dp |
| 635 |
dudy = 0.0_dp |
| 636 |
dudz = 0.0_dp |
| 637 |
|
| 638 |
dudux_i = 0.0_dp |
| 639 |
duduy_i = 0.0_dp |
| 640 |
duduz_i = 0.0_dp |
| 641 |
|
| 642 |
dudux_j = 0.0_dp |
| 643 |
duduy_j = 0.0_dp |
| 644 |
duduz_j = 0.0_dp |
| 645 |
|
| 646 |
if (i_is_Charge) then |
| 647 |
|
| 648 |
if (j_is_Charge) then |
| 649 |
if (screeningMethod .eq. DAMPED) then |
| 650 |
f0 = derfc(dampingAlpha*rij) |
| 651 |
varEXP = exp(-alpha2*rij*rij) |
| 652 |
f1 = alphaPi*rij*varEXP + f0 |
| 653 |
endif |
| 654 |
|
| 655 |
preVal = pre11 * q_i * q_j |
| 656 |
|
| 657 |
if (summationMethod .eq. SHIFTED_POTENTIAL) then |
| 658 |
vterm = preVal * (riji*f0 - rcuti*f0c) |
| 659 |
|
| 660 |
dudr = -sw * preVal * riji * riji * f1 |
| 661 |
|
| 662 |
elseif (summationMethod .eq. SHIFTED_FORCE) then |
| 663 |
vterm = preVal * ( riji*f0 - rcuti*f0c + & |
| 664 |
f1c*rcuti2*(rij-defaultCutoff) ) |
| 665 |
|
| 666 |
dudr = -sw*preVal * (riji*riji*f1 - rcuti2*f1c) |
| 667 |
|
| 668 |
elseif (summationMethod .eq. REACTION_FIELD) then |
| 669 |
rfVal = preRF*rij*rij |
| 670 |
vterm = preVal * ( riji + rfVal ) |
| 671 |
|
| 672 |
dudr = sw * preVal * ( 2.0d0*rfVal - riji )*riji |
| 673 |
|
| 674 |
else |
| 675 |
vterm = preVal * riji*f0 |
| 676 |
|
| 677 |
dudr = - sw * preVal * riji*riji*f1 |
| 678 |
|
| 679 |
endif |
| 680 |
|
| 681 |
vpair = vpair + vterm |
| 682 |
epot = epot + sw*vterm |
| 683 |
|
| 684 |
dudx = dudx + dudr * xhat |
| 685 |
dudy = dudy + dudr * yhat |
| 686 |
dudz = dudz + dudr * zhat |
| 687 |
|
| 688 |
endif |
| 689 |
|
| 690 |
if (j_is_Dipole) then |
| 691 |
|
| 692 |
pref = pre12 * q_i * mu_j |
| 693 |
|
| 694 |
!!$ if (summationMethod .eq. UNDAMPED_WOLF) then |
| 695 |
!!$ ri2 = riji * riji |
| 696 |
!!$ ri3 = ri2 * riji |
| 697 |
!!$ |
| 698 |
!!$ pref = pre12 * q_i * mu_j |
| 699 |
!!$ vterm = - pref * ct_j * (ri2 - rcuti2) |
| 700 |
!!$ vpair = vpair + vterm |
| 701 |
!!$ epot = epot + sw*vterm |
| 702 |
!!$ |
| 703 |
!!$ !! this has a + sign in the () because the rij vector is |
| 704 |
!!$ !! r_j - r_i and the charge-dipole potential takes the origin |
| 705 |
!!$ !! as the point dipole, which is atom j in this case. |
| 706 |
!!$ |
| 707 |
!!$ dudx = dudx - sw*pref * ( ri3*( uz_j(1) - 3.0d0*ct_j*xhat) & |
| 708 |
!!$ - rcuti3*( uz_j(1) - 3.0d0*ct_j*d(1)*rcuti ) ) |
| 709 |
!!$ dudy = dudy - sw*pref * ( ri3*( uz_j(2) - 3.0d0*ct_j*yhat) & |
| 710 |
!!$ - rcuti3*( uz_j(2) - 3.0d0*ct_j*d(2)*rcuti ) ) |
| 711 |
!!$ dudz = dudz - sw*pref * ( ri3*( uz_j(3) - 3.0d0*ct_j*zhat) & |
| 712 |
!!$ - rcuti3*( uz_j(3) - 3.0d0*ct_j*d(3)*rcuti ) ) |
| 713 |
!!$ |
| 714 |
!!$ duduz_j(1) = duduz_j(1) - sw*pref*( ri2*xhat - d(1)*rcuti3 ) |
| 715 |
!!$ duduz_j(2) = duduz_j(2) - sw*pref*( ri2*yhat - d(2)*rcuti3 ) |
| 716 |
!!$ duduz_j(3) = duduz_j(3) - sw*pref*( ri2*zhat - d(3)*rcuti3 ) |
| 717 |
!!$ |
| 718 |
!!$ elseif (summationMethod .eq. REACTION_FIELD) then |
| 719 |
|
| 720 |
if (summationMethod .eq. REACTION_FIELD) then |
| 721 |
ri2 = riji * riji |
| 722 |
ri3 = ri2 * riji |
| 723 |
|
| 724 |
pref = pre12 * q_i * mu_j |
| 725 |
vterm = - pref * ct_j * ( ri2 - preRF2*rij ) |
| 726 |
vpair = vpair + vterm |
| 727 |
epot = epot + sw*vterm |
| 728 |
|
| 729 |
!! this has a + sign in the () because the rij vector is |
| 730 |
!! r_j - r_i and the charge-dipole potential takes the origin |
| 731 |
!! as the point dipole, which is atom j in this case. |
| 732 |
|
| 733 |
dudx = dudx - sw*pref*( ri3*(uz_j(1) - 3.0d0*ct_j*xhat) - & |
| 734 |
preRF2*uz_j(1) ) |
| 735 |
dudy = dudy - sw*pref*( ri3*(uz_j(2) - 3.0d0*ct_j*yhat) - & |
| 736 |
preRF2*uz_j(2) ) |
| 737 |
dudz = dudz - sw*pref*( ri3*(uz_j(3) - 3.0d0*ct_j*zhat) - & |
| 738 |
preRF2*uz_j(3) ) |
| 739 |
duduz_j(1) = duduz_j(1) - sw*pref * xhat * ( ri2 - preRF2*rij ) |
| 740 |
duduz_j(2) = duduz_j(2) - sw*pref * yhat * ( ri2 - preRF2*rij ) |
| 741 |
duduz_j(3) = duduz_j(3) - sw*pref * zhat * ( ri2 - preRF2*rij ) |
| 742 |
|
| 743 |
else |
| 744 |
if (j_is_SplitDipole) then |
| 745 |
BigR = sqrt(r2 + 0.25_dp * d_j * d_j) |
| 746 |
ri = 1.0_dp / BigR |
| 747 |
scale = rij * ri |
| 748 |
else |
| 749 |
ri = riji |
| 750 |
scale = 1.0_dp |
| 751 |
endif |
| 752 |
|
| 753 |
ri2 = ri * ri |
| 754 |
ri3 = ri2 * ri |
| 755 |
sc2 = scale * scale |
| 756 |
|
| 757 |
pref = pre12 * q_i * mu_j |
| 758 |
vterm = - pref * ct_j * ri2 * scale |
| 759 |
vpair = vpair + vterm |
| 760 |
epot = epot + sw*vterm |
| 761 |
|
| 762 |
!! this has a + sign in the () because the rij vector is |
| 763 |
!! r_j - r_i and the charge-dipole potential takes the origin |
| 764 |
!! as the point dipole, which is atom j in this case. |
| 765 |
|
| 766 |
dudx = dudx - sw*pref * ri3 * ( uz_j(1) - 3.0d0*ct_j*xhat*sc2) |
| 767 |
dudy = dudy - sw*pref * ri3 * ( uz_j(2) - 3.0d0*ct_j*yhat*sc2) |
| 768 |
dudz = dudz - sw*pref * ri3 * ( uz_j(3) - 3.0d0*ct_j*zhat*sc2) |
| 769 |
|
| 770 |
duduz_j(1) = duduz_j(1) - sw*pref * ri2 * xhat * scale |
| 771 |
duduz_j(2) = duduz_j(2) - sw*pref * ri2 * yhat * scale |
| 772 |
duduz_j(3) = duduz_j(3) - sw*pref * ri2 * zhat * scale |
| 773 |
|
| 774 |
endif |
| 775 |
endif |
| 776 |
|
| 777 |
if (j_is_Quadrupole) then |
| 778 |
ri2 = riji * riji |
| 779 |
ri3 = ri2 * riji |
| 780 |
ri4 = ri2 * ri2 |
| 781 |
cx2 = cx_j * cx_j |
| 782 |
cy2 = cy_j * cy_j |
| 783 |
cz2 = cz_j * cz_j |
| 784 |
|
| 785 |
!!$ if (summationMethod .eq. UNDAMPED_WOLF) then |
| 786 |
!!$ pref = pre14 * q_i / 3.0_dp |
| 787 |
!!$ vterm1 = pref * ri3*( qxx_j * (3.0_dp*cx2 - 1.0_dp) + & |
| 788 |
!!$ qyy_j * (3.0_dp*cy2 - 1.0_dp) + & |
| 789 |
!!$ qzz_j * (3.0_dp*cz2 - 1.0_dp) ) |
| 790 |
!!$ vterm2 = pref * rcuti3*( qxx_j * (3.0_dp*cx2 - 1.0_dp) + & |
| 791 |
!!$ qyy_j * (3.0_dp*cy2 - 1.0_dp) + & |
| 792 |
!!$ qzz_j * (3.0_dp*cz2 - 1.0_dp) ) |
| 793 |
!!$ vpair = vpair + ( vterm1 - vterm2 ) |
| 794 |
!!$ epot = epot + sw*( vterm1 - vterm2 ) |
| 795 |
!!$ |
| 796 |
!!$ dudx = dudx - (5.0_dp * & |
| 797 |
!!$ (vterm1*riji*xhat - vterm2*rcuti2*d(1))) + sw*pref * ( & |
| 798 |
!!$ (ri4 - rcuti4)*(qxx_j*(6.0_dp*cx_j*ux_j(1)) - & |
| 799 |
!!$ qxx_j*2.0_dp*(xhat - rcuti*d(1))) + & |
| 800 |
!!$ (ri4 - rcuti4)*(qyy_j*(6.0_dp*cy_j*uy_j(1)) - & |
| 801 |
!!$ qyy_j*2.0_dp*(xhat - rcuti*d(1))) + & |
| 802 |
!!$ (ri4 - rcuti4)*(qzz_j*(6.0_dp*cz_j*uz_j(1)) - & |
| 803 |
!!$ qzz_j*2.0_dp*(xhat - rcuti*d(1))) ) |
| 804 |
!!$ dudy = dudy - (5.0_dp * & |
| 805 |
!!$ (vterm1*riji*yhat - vterm2*rcuti2*d(2))) + sw*pref * ( & |
| 806 |
!!$ (ri4 - rcuti4)*(qxx_j*(6.0_dp*cx_j*ux_j(2)) - & |
| 807 |
!!$ qxx_j*2.0_dp*(yhat - rcuti*d(2))) + & |
| 808 |
!!$ (ri4 - rcuti4)*(qyy_j*(6.0_dp*cy_j*uy_j(2)) - & |
| 809 |
!!$ qyy_j*2.0_dp*(yhat - rcuti*d(2))) + & |
| 810 |
!!$ (ri4 - rcuti4)*(qzz_j*(6.0_dp*cz_j*uz_j(2)) - & |
| 811 |
!!$ qzz_j*2.0_dp*(yhat - rcuti*d(2))) ) |
| 812 |
!!$ dudz = dudz - (5.0_dp * & |
| 813 |
!!$ (vterm1*riji*zhat - vterm2*rcuti2*d(3))) + sw*pref * ( & |
| 814 |
!!$ (ri4 - rcuti4)*(qxx_j*(6.0_dp*cx_j*ux_j(3)) - & |
| 815 |
!!$ qxx_j*2.0_dp*(zhat - rcuti*d(3))) + & |
| 816 |
!!$ (ri4 - rcuti4)*(qyy_j*(6.0_dp*cy_j*uy_j(3)) - & |
| 817 |
!!$ qyy_j*2.0_dp*(zhat - rcuti*d(3))) + & |
| 818 |
!!$ (ri4 - rcuti4)*(qzz_j*(6.0_dp*cz_j*uz_j(3)) - & |
| 819 |
!!$ qzz_j*2.0_dp*(zhat - rcuti*d(3))) ) |
| 820 |
!!$ |
| 821 |
!!$ dudux_j(1) = dudux_j(1) + sw*pref*(ri3*(qxx_j*6.0_dp*cx_j*xhat) -& |
| 822 |
!!$ rcuti4*(qxx_j*6.0_dp*cx_j*d(1))) |
| 823 |
!!$ dudux_j(2) = dudux_j(2) + sw*pref*(ri3*(qxx_j*6.0_dp*cx_j*yhat) -& |
| 824 |
!!$ rcuti4*(qxx_j*6.0_dp*cx_j*d(2))) |
| 825 |
!!$ dudux_j(3) = dudux_j(3) + sw*pref*(ri3*(qxx_j*6.0_dp*cx_j*zhat) -& |
| 826 |
!!$ rcuti4*(qxx_j*6.0_dp*cx_j*d(3))) |
| 827 |
!!$ |
| 828 |
!!$ duduy_j(1) = duduy_j(1) + sw*pref*(ri3*(qyy_j*6.0_dp*cy_j*xhat) -& |
| 829 |
!!$ rcuti4*(qyy_j*6.0_dp*cx_j*d(1))) |
| 830 |
!!$ duduy_j(2) = duduy_j(2) + sw*pref*(ri3*(qyy_j*6.0_dp*cy_j*yhat) -& |
| 831 |
!!$ rcuti4*(qyy_j*6.0_dp*cx_j*d(2))) |
| 832 |
!!$ duduy_j(3) = duduy_j(3) + sw*pref*(ri3*(qyy_j*6.0_dp*cy_j*zhat) -& |
| 833 |
!!$ rcuti4*(qyy_j*6.0_dp*cx_j*d(3))) |
| 834 |
!!$ |
| 835 |
!!$ duduz_j(1) = duduz_j(1) + sw*pref*(ri3*(qzz_j*6.0_dp*cz_j*xhat) -& |
| 836 |
!!$ rcuti4*(qzz_j*6.0_dp*cx_j*d(1))) |
| 837 |
!!$ duduz_j(2) = duduz_j(2) + sw*pref*(ri3*(qzz_j*6.0_dp*cz_j*yhat) -& |
| 838 |
!!$ rcuti4*(qzz_j*6.0_dp*cx_j*d(2))) |
| 839 |
!!$ duduz_j(3) = duduz_j(3) + sw*pref*(ri3*(qzz_j*6.0_dp*cz_j*zhat) -& |
| 840 |
!!$ rcuti4*(qzz_j*6.0_dp*cx_j*d(3))) |
| 841 |
!!$ |
| 842 |
!!$ else |
| 843 |
pref = pre14 * q_i / 3.0_dp |
| 844 |
vterm = pref * ri3 * (qxx_j * (3.0_dp*cx2 - 1.0_dp) + & |
| 845 |
qyy_j * (3.0_dp*cy2 - 1.0_dp) + & |
| 846 |
qzz_j * (3.0_dp*cz2 - 1.0_dp)) |
| 847 |
vpair = vpair + vterm |
| 848 |
epot = epot + sw*vterm |
| 849 |
|
| 850 |
dudx = dudx - 5.0_dp*sw*vterm*riji*xhat + sw*pref * ri4 * ( & |
| 851 |
qxx_j*(6.0_dp*cx_j*ux_j(1) - 2.0_dp*xhat) + & |
| 852 |
qyy_j*(6.0_dp*cy_j*uy_j(1) - 2.0_dp*xhat) + & |
| 853 |
qzz_j*(6.0_dp*cz_j*uz_j(1) - 2.0_dp*xhat) ) |
| 854 |
dudy = dudy - 5.0_dp*sw*vterm*riji*yhat + sw*pref * ri4 * ( & |
| 855 |
qxx_j*(6.0_dp*cx_j*ux_j(2) - 2.0_dp*yhat) + & |
| 856 |
qyy_j*(6.0_dp*cy_j*uy_j(2) - 2.0_dp*yhat) + & |
| 857 |
qzz_j*(6.0_dp*cz_j*uz_j(2) - 2.0_dp*yhat) ) |
| 858 |
dudz = dudz - 5.0_dp*sw*vterm*riji*zhat + sw*pref * ri4 * ( & |
| 859 |
qxx_j*(6.0_dp*cx_j*ux_j(3) - 2.0_dp*zhat) + & |
| 860 |
qyy_j*(6.0_dp*cy_j*uy_j(3) - 2.0_dp*zhat) + & |
| 861 |
qzz_j*(6.0_dp*cz_j*uz_j(3) - 2.0_dp*zhat) ) |
| 862 |
|
| 863 |
dudux_j(1) = dudux_j(1) + sw*pref * ri3*(qxx_j*6.0_dp*cx_j*xhat) |
| 864 |
dudux_j(2) = dudux_j(2) + sw*pref * ri3*(qxx_j*6.0_dp*cx_j*yhat) |
| 865 |
dudux_j(3) = dudux_j(3) + sw*pref * ri3*(qxx_j*6.0_dp*cx_j*zhat) |
| 866 |
|
| 867 |
duduy_j(1) = duduy_j(1) + sw*pref * ri3*(qyy_j*6.0_dp*cy_j*xhat) |
| 868 |
duduy_j(2) = duduy_j(2) + sw*pref * ri3*(qyy_j*6.0_dp*cy_j*yhat) |
| 869 |
duduy_j(3) = duduy_j(3) + sw*pref * ri3*(qyy_j*6.0_dp*cy_j*zhat) |
| 870 |
|
| 871 |
duduz_j(1) = duduz_j(1) + sw*pref * ri3*(qzz_j*6.0_dp*cz_j*xhat) |
| 872 |
duduz_j(2) = duduz_j(2) + sw*pref * ri3*(qzz_j*6.0_dp*cz_j*yhat) |
| 873 |
duduz_j(3) = duduz_j(3) + sw*pref * ri3*(qzz_j*6.0_dp*cz_j*zhat) |
| 874 |
|
| 875 |
!!$ endif |
| 876 |
endif |
| 877 |
endif |
| 878 |
|
| 879 |
if (i_is_Dipole) then |
| 880 |
|
| 881 |
if (j_is_Charge) then |
| 882 |
|
| 883 |
if (summationMethod .eq. SHIFTED_POTENTIAL) then |
| 884 |
ri2 = riji * riji |
| 885 |
ri3 = ri2 * riji |
| 886 |
|
| 887 |
pref = pre12 * q_j * mu_i |
| 888 |
pot_term = ri2 - rcuti2 |
| 889 |
vterm = pref * ct_i * pot_term |
| 890 |
vpair = vpair + vterm |
| 891 |
epot = epot + sw*vterm |
| 892 |
|
| 893 |
dudx = dudx + sw*pref * ( ri3*(uz_i(1)-3.0d0*ct_i*xhat) ) |
| 894 |
dudy = dudy + sw*pref * ( ri3*(uz_i(2)-3.0d0*ct_i*yhat) ) |
| 895 |
dudz = dudz + sw*pref * ( ri3*(uz_i(3)-3.0d0*ct_i*zhat) ) |
| 896 |
|
| 897 |
duduz_i(1) = duduz_i(1) + sw*pref * xhat * pot_term |
| 898 |
duduz_i(2) = duduz_i(2) + sw*pref * yhat * pot_term |
| 899 |
duduz_i(3) = duduz_i(3) + sw*pref * zhat * pot_term |
| 900 |
|
| 901 |
elseif (summationMethod .eq. SHIFTED_FORCE) then |
| 902 |
ri2 = riji * riji |
| 903 |
ri3 = ri2 * riji |
| 904 |
|
| 905 |
pref = pre12 * q_j * mu_i |
| 906 |
pot_term = ri2 - rcuti2 + 2.0d0*rcuti3*( rij - defaultCutoff ) |
| 907 |
vterm = pref * ct_i * pot_term |
| 908 |
vpair = vpair + vterm |
| 909 |
epot = epot + sw*vterm |
| 910 |
|
| 911 |
dudx = dudx + sw*pref * ( (ri3-rcuti3)*(uz_i(1)-3.0d0*ct_i*xhat) ) |
| 912 |
dudy = dudy + sw*pref * ( (ri3-rcuti3)*(uz_i(2)-3.0d0*ct_i*yhat) ) |
| 913 |
dudz = dudz + sw*pref * ( (ri3-rcuti3)*(uz_i(3)-3.0d0*ct_i*zhat) ) |
| 914 |
|
| 915 |
duduz_i(1) = duduz_i(1) + sw*pref * xhat * pot_term |
| 916 |
duduz_i(2) = duduz_i(2) + sw*pref * yhat * pot_term |
| 917 |
duduz_i(3) = duduz_i(3) + sw*pref * zhat * pot_term |
| 918 |
|
| 919 |
elseif (summationMethod .eq. REACTION_FIELD) then |
| 920 |
ri2 = riji * riji |
| 921 |
ri3 = ri2 * riji |
| 922 |
|
| 923 |
pref = pre12 * q_j * mu_i |
| 924 |
vterm = pref * ct_i * ( ri2 - preRF2*rij ) |
| 925 |
vpair = vpair + vterm |
| 926 |
epot = epot + sw*vterm |
| 927 |
|
| 928 |
dudx = dudx + sw*pref * ( ri3*(uz_i(1) - 3.0d0*ct_i*xhat) - & |
| 929 |
preRF2*uz_i(1) ) |
| 930 |
dudy = dudy + sw*pref * ( ri3*(uz_i(2) - 3.0d0*ct_i*yhat) - & |
| 931 |
preRF2*uz_i(2) ) |
| 932 |
dudz = dudz + sw*pref * ( ri3*(uz_i(3) - 3.0d0*ct_i*zhat) - & |
| 933 |
preRF2*uz_i(3) ) |
| 934 |
|
| 935 |
duduz_i(1) = duduz_i(1) + sw*pref * xhat * ( ri2 - preRF2*rij ) |
| 936 |
duduz_i(2) = duduz_i(2) + sw*pref * yhat * ( ri2 - preRF2*rij ) |
| 937 |
duduz_i(3) = duduz_i(3) + sw*pref * zhat * ( ri2 - preRF2*rij ) |
| 938 |
|
| 939 |
else |
| 940 |
if (i_is_SplitDipole) then |
| 941 |
BigR = sqrt(r2 + 0.25_dp * d_i * d_i) |
| 942 |
ri = 1.0_dp / BigR |
| 943 |
scale = rij * ri |
| 944 |
else |
| 945 |
ri = riji |
| 946 |
scale = 1.0_dp |
| 947 |
endif |
| 948 |
|
| 949 |
ri2 = ri * ri |
| 950 |
ri3 = ri2 * ri |
| 951 |
sc2 = scale * scale |
| 952 |
|
| 953 |
pref = pre12 * q_j * mu_i |
| 954 |
vterm = pref * ct_i * ri2 * scale |
| 955 |
vpair = vpair + vterm |
| 956 |
epot = epot + sw*vterm |
| 957 |
|
| 958 |
dudx = dudx + sw*pref * ri3 * ( uz_i(1) - 3.0d0 * ct_i * xhat*sc2) |
| 959 |
dudy = dudy + sw*pref * ri3 * ( uz_i(2) - 3.0d0 * ct_i * yhat*sc2) |
| 960 |
dudz = dudz + sw*pref * ri3 * ( uz_i(3) - 3.0d0 * ct_i * zhat*sc2) |
| 961 |
|
| 962 |
duduz_i(1) = duduz_i(1) + sw*pref * ri2 * xhat * scale |
| 963 |
duduz_i(2) = duduz_i(2) + sw*pref * ri2 * yhat * scale |
| 964 |
duduz_i(3) = duduz_i(3) + sw*pref * ri2 * zhat * scale |
| 965 |
endif |
| 966 |
endif |
| 967 |
|
| 968 |
if (j_is_Dipole) then |
| 969 |
ct_ij = uz_i(1)*uz_j(1) + uz_i(2)*uz_j(2) + uz_i(3)*uz_j(3) |
| 970 |
|
| 971 |
ri2 = riji * riji |
| 972 |
ri3 = ri2 * riji |
| 973 |
ri4 = ri2 * ri2 |
| 974 |
|
| 975 |
pref = pre22 * mu_i * mu_j |
| 976 |
|
| 977 |
!!$ if (summationMethod .eq. SHIFTED_POTENTIAL) then |
| 978 |
!!$ a0 = ct_ij - 3.0d0 * ct_i * ct_j |
| 979 |
!!$ pot_term = ri3 - rcuti3 |
| 980 |
!!$ |
| 981 |
!!$ vterm = pref*pot_term*a0 |
| 982 |
!!$ vpair = vpair + vterm |
| 983 |
!!$ epot = epot + sw*vterm |
| 984 |
!!$ |
| 985 |
!!$ a1 = 5.0d0 * ct_i * ct_j - ct_ij |
| 986 |
!!$ |
| 987 |
!!$ dudx = dudx + sw*pref*3.0d0*ri4 & |
| 988 |
!!$ * (a1*xhat-ct_i*uz_j(1)-ct_j*uz_i(1)) |
| 989 |
!!$ dudy = dudy + sw*pref*3.0d0*ri4 & |
| 990 |
!!$ * (a1*yhat-ct_i*uz_j(2)-ct_j*uz_i(2)) |
| 991 |
!!$ dudz = dudz + sw*pref*3.0d0*ri4 & |
| 992 |
!!$ * (a1*zhat-ct_i*uz_j(3)-ct_j*uz_i(3)) |
| 993 |
!!$ |
| 994 |
!!$ duduz_i(1) = duduz_i(1) + sw*pref*( pot_term & |
| 995 |
!!$ * (uz_j(1) - 3.0d0*ct_j*xhat) ) |
| 996 |
!!$ duduz_i(2) = duduz_i(2) + sw*pref*( pot_term & |
| 997 |
!!$ * (uz_j(2) - 3.0d0*ct_j*yhat) ) |
| 998 |
!!$ duduz_i(3) = duduz_i(3) + sw*pref*( pot_term & |
| 999 |
!!$ * (uz_j(3) - 3.0d0*ct_j*zhat) ) |
| 1000 |
!!$ duduz_j(1) = duduz_j(1) + sw*pref*( pot_term & |
| 1001 |
!!$ * (uz_i(1) - 3.0d0*ct_i*xhat) ) |
| 1002 |
!!$ duduz_j(2) = duduz_j(2) + sw*pref*( pot_term & |
| 1003 |
!!$ * (uz_i(2) - 3.0d0*ct_i*yhat) ) |
| 1004 |
!!$ duduz_j(3) = duduz_j(3) + sw*pref*( pot_term & |
| 1005 |
!!$ * (uz_i(3) - 3.0d0*ct_i*zhat) ) |
| 1006 |
!!$ |
| 1007 |
!!$ elseif (summationMethod .eq. SHIFTED_FORCE) then |
| 1008 |
!!$ a0 = ct_ij - 3.0d0 * ct_i * ct_j |
| 1009 |
!!$ pot_term = ri3 - rcuti3 + 3.0d0*rcuti4*( rij - defaultCutoff ) |
| 1010 |
!!$ |
| 1011 |
!!$ vterm = pref*pot_term*a0 |
| 1012 |
!!$ vpair = vpair + vterm |
| 1013 |
!!$ epot = epot + sw*vterm |
| 1014 |
!!$ |
| 1015 |
!!$ a1 = 5.0d0 * ct_i * ct_j - ct_ij |
| 1016 |
!!$ |
| 1017 |
!!$ dudx = dudx + sw*pref*3.0d0*( ri4 - rcuti4 ) & |
| 1018 |
!!$ * (a1*xhat-ct_i*uz_j(1)-ct_j*uz_i(1)) |
| 1019 |
!!$ dudy = dudy + sw*pref*3.0d0*( ri4 - rcuti4 ) & |
| 1020 |
!!$ * (a1*yhat-ct_i*uz_j(2)-ct_j*uz_i(2)) |
| 1021 |
!!$ dudz = dudz + sw*pref*3.0d0*( ri4 - rcuti4 ) & |
| 1022 |
!!$ * (a1*zhat-ct_i*uz_j(3)-ct_j*uz_i(3)) |
| 1023 |
!!$ |
| 1024 |
!!$ duduz_i(1) = duduz_i(1) + sw*pref*( pot_term & |
| 1025 |
!!$ * (uz_j(1) - 3.0d0*ct_j*xhat) ) |
| 1026 |
!!$ duduz_i(2) = duduz_i(2) + sw*pref*( pot_term & |
| 1027 |
!!$ * (uz_j(2) - 3.0d0*ct_j*yhat) ) |
| 1028 |
!!$ duduz_i(3) = duduz_i(3) + sw*pref*( pot_term & |
| 1029 |
!!$ * (uz_j(3) - 3.0d0*ct_j*zhat) ) |
| 1030 |
!!$ duduz_j(1) = duduz_j(1) + sw*pref*( pot_term & |
| 1031 |
!!$ * (uz_i(1) - 3.0d0*ct_i*xhat) ) |
| 1032 |
!!$ duduz_j(2) = duduz_j(2) + sw*pref*( pot_term & |
| 1033 |
!!$ * (uz_i(2) - 3.0d0*ct_i*yhat) ) |
| 1034 |
!!$ duduz_j(3) = duduz_j(3) + sw*pref*( pot_term & |
| 1035 |
!!$ * (uz_i(3) - 3.0d0*ct_i*zhat) ) |
| 1036 |
!!$ |
| 1037 |
!!$ elseif (summationMethod .eq. REACTION_FIELD) then |
| 1038 |
if (summationMethod .eq. REACTION_FIELD) then |
| 1039 |
vterm = pref*( ri3*(ct_ij - 3.0d0 * ct_i * ct_j) - & |
| 1040 |
preRF2*ct_ij ) |
| 1041 |
vpair = vpair + vterm |
| 1042 |
epot = epot + sw*vterm |
| 1043 |
|
| 1044 |
a1 = 5.0d0 * ct_i * ct_j - ct_ij |
| 1045 |
|
| 1046 |
dudx = dudx + sw*pref*3.0d0*ri4 & |
| 1047 |
* (a1*xhat-ct_i*uz_j(1)-ct_j*uz_i(1)) |
| 1048 |
dudy = dudy + sw*pref*3.0d0*ri4 & |
| 1049 |
* (a1*yhat-ct_i*uz_j(2)-ct_j*uz_i(2)) |
| 1050 |
dudz = dudz + sw*pref*3.0d0*ri4 & |
| 1051 |
* (a1*zhat-ct_i*uz_j(3)-ct_j*uz_i(3)) |
| 1052 |
|
| 1053 |
duduz_i(1) = duduz_i(1) + sw*pref*(ri3*(uz_j(1)-3.0d0*ct_j*xhat) & |
| 1054 |
- preRF2*uz_j(1)) |
| 1055 |
duduz_i(2) = duduz_i(2) + sw*pref*(ri3*(uz_j(2)-3.0d0*ct_j*yhat) & |
| 1056 |
- preRF2*uz_j(2)) |
| 1057 |
duduz_i(3) = duduz_i(3) + sw*pref*(ri3*(uz_j(3)-3.0d0*ct_j*zhat) & |
| 1058 |
- preRF2*uz_j(3)) |
| 1059 |
duduz_j(1) = duduz_j(1) + sw*pref*(ri3*(uz_i(1)-3.0d0*ct_i*xhat) & |
| 1060 |
- preRF2*uz_i(1)) |
| 1061 |
duduz_j(2) = duduz_j(2) + sw*pref*(ri3*(uz_i(2)-3.0d0*ct_i*yhat) & |
| 1062 |
- preRF2*uz_i(2)) |
| 1063 |
duduz_j(3) = duduz_j(3) + sw*pref*(ri3*(uz_i(3)-3.0d0*ct_i*zhat) & |
| 1064 |
- preRF2*uz_i(3)) |
| 1065 |
|
| 1066 |
else |
| 1067 |
if (i_is_SplitDipole) then |
| 1068 |
if (j_is_SplitDipole) then |
| 1069 |
BigR = sqrt(r2 + 0.25_dp * d_i * d_i + 0.25_dp * d_j * d_j) |
| 1070 |
else |
| 1071 |
BigR = sqrt(r2 + 0.25_dp * d_i * d_i) |
| 1072 |
endif |
| 1073 |
ri = 1.0_dp / BigR |
| 1074 |
scale = rij * ri |
| 1075 |
else |
| 1076 |
if (j_is_SplitDipole) then |
| 1077 |
BigR = sqrt(r2 + 0.25_dp * d_j * d_j) |
| 1078 |
ri = 1.0_dp / BigR |
| 1079 |
scale = rij * ri |
| 1080 |
else |
| 1081 |
ri = riji |
| 1082 |
scale = 1.0_dp |
| 1083 |
endif |
| 1084 |
endif |
| 1085 |
|
| 1086 |
sc2 = scale * scale |
| 1087 |
|
| 1088 |
vterm = pref * ri3 * (ct_ij - 3.0d0 * ct_i * ct_j * sc2) |
| 1089 |
vpair = vpair + vterm |
| 1090 |
epot = epot + sw*vterm |
| 1091 |
|
| 1092 |
a1 = 5.0d0 * ct_i * ct_j * sc2 - ct_ij |
| 1093 |
|
| 1094 |
dudx = dudx + sw*pref*3.0d0*ri4*scale & |
| 1095 |
*(a1*xhat-ct_i*uz_j(1)-ct_j*uz_i(1)) |
| 1096 |
dudy = dudy + sw*pref*3.0d0*ri4*scale & |
| 1097 |
*(a1*yhat-ct_i*uz_j(2)-ct_j*uz_i(2)) |
| 1098 |
dudz = dudz + sw*pref*3.0d0*ri4*scale & |
| 1099 |
*(a1*zhat-ct_i*uz_j(3)-ct_j*uz_i(3)) |
| 1100 |
|
| 1101 |
duduz_i(1) = duduz_i(1) + sw*pref*ri3 & |
| 1102 |
*(uz_j(1) - 3.0d0*ct_j*xhat*sc2) |
| 1103 |
duduz_i(2) = duduz_i(2) + sw*pref*ri3 & |
| 1104 |
*(uz_j(2) - 3.0d0*ct_j*yhat*sc2) |
| 1105 |
duduz_i(3) = duduz_i(3) + sw*pref*ri3 & |
| 1106 |
*(uz_j(3) - 3.0d0*ct_j*zhat*sc2) |
| 1107 |
|
| 1108 |
duduz_j(1) = duduz_j(1) + sw*pref*ri3 & |
| 1109 |
*(uz_i(1) - 3.0d0*ct_i*xhat*sc2) |
| 1110 |
duduz_j(2) = duduz_j(2) + sw*pref*ri3 & |
| 1111 |
*(uz_i(2) - 3.0d0*ct_i*yhat*sc2) |
| 1112 |
duduz_j(3) = duduz_j(3) + sw*pref*ri3 & |
| 1113 |
*(uz_i(3) - 3.0d0*ct_i*zhat*sc2) |
| 1114 |
endif |
| 1115 |
endif |
| 1116 |
endif |
| 1117 |
|
| 1118 |
if (i_is_Quadrupole) then |
| 1119 |
if (j_is_Charge) then |
| 1120 |
|
| 1121 |
ri2 = riji * riji |
| 1122 |
ri3 = ri2 * riji |
| 1123 |
ri4 = ri2 * ri2 |
| 1124 |
cx2 = cx_i * cx_i |
| 1125 |
cy2 = cy_i * cy_i |
| 1126 |
cz2 = cz_i * cz_i |
| 1127 |
|
| 1128 |
!!$ if (summationMethod .eq. UNDAMPED_WOLF) then |
| 1129 |
!!$ pref = pre14 * q_j / 3.0_dp |
| 1130 |
!!$ vterm1 = pref * ri3*( qxx_i * (3.0_dp*cx2 - 1.0_dp) + & |
| 1131 |
!!$ qyy_i * (3.0_dp*cy2 - 1.0_dp) + & |
| 1132 |
!!$ qzz_i * (3.0_dp*cz2 - 1.0_dp) ) |
| 1133 |
!!$ vterm2 = pref * rcuti3*( qxx_i * (3.0_dp*cx2 - 1.0_dp) + & |
| 1134 |
!!$ qyy_i * (3.0_dp*cy2 - 1.0_dp) + & |
| 1135 |
!!$ qzz_i * (3.0_dp*cz2 - 1.0_dp) ) |
| 1136 |
!!$ vpair = vpair + ( vterm1 - vterm2 ) |
| 1137 |
!!$ epot = epot + sw*( vterm1 - vterm2 ) |
| 1138 |
!!$ |
| 1139 |
!!$ dudx = dudx - sw*(5.0_dp*(vterm1*riji*xhat-vterm2*rcuti2*d(1))) +& |
| 1140 |
!!$ sw*pref * ( (ri4 - rcuti4)*(qxx_i*(6.0_dp*cx_i*ux_i(1)) - & |
| 1141 |
!!$ qxx_i*2.0_dp*(xhat - rcuti*d(1))) + & |
| 1142 |
!!$ (ri4 - rcuti4)*(qyy_i*(6.0_dp*cy_i*uy_i(1)) - & |
| 1143 |
!!$ qyy_i*2.0_dp*(xhat - rcuti*d(1))) + & |
| 1144 |
!!$ (ri4 - rcuti4)*(qzz_i*(6.0_dp*cz_i*uz_i(1)) - & |
| 1145 |
!!$ qzz_i*2.0_dp*(xhat - rcuti*d(1))) ) |
| 1146 |
!!$ dudy = dudy - sw*(5.0_dp*(vterm1*riji*yhat-vterm2*rcuti2*d(2))) +& |
| 1147 |
!!$ sw*pref * ( (ri4 - rcuti4)*(qxx_i*(6.0_dp*cx_i*ux_i(2)) - & |
| 1148 |
!!$ qxx_i*2.0_dp*(yhat - rcuti*d(2))) + & |
| 1149 |
!!$ (ri4 - rcuti4)*(qyy_i*(6.0_dp*cy_i*uy_i(2)) - & |
| 1150 |
!!$ qyy_i*2.0_dp*(yhat - rcuti*d(2))) + & |
| 1151 |
!!$ (ri4 - rcuti4)*(qzz_i*(6.0_dp*cz_i*uz_i(2)) - & |
| 1152 |
!!$ qzz_i*2.0_dp*(yhat - rcuti*d(2))) ) |
| 1153 |
!!$ dudz = dudz - sw*(5.0_dp*(vterm1*riji*zhat-vterm2*rcuti2*d(3))) +& |
| 1154 |
!!$ sw*pref * ( (ri4 - rcuti4)*(qxx_i*(6.0_dp*cx_i*ux_i(3)) - & |
| 1155 |
!!$ qxx_i*2.0_dp*(zhat - rcuti*d(3))) + & |
| 1156 |
!!$ (ri4 - rcuti4)*(qyy_i*(6.0_dp*cy_i*uy_i(3)) - & |
| 1157 |
!!$ qyy_i*2.0_dp*(zhat - rcuti*d(3))) + & |
| 1158 |
!!$ (ri4 - rcuti4)*(qzz_i*(6.0_dp*cz_i*uz_i(3)) - & |
| 1159 |
!!$ qzz_i*2.0_dp*(zhat - rcuti*d(3))) ) |
| 1160 |
!!$ |
| 1161 |
!!$ dudux_i(1) = dudux_i(1) + sw*pref*(ri3*(qxx_i*6.0_dp*cx_i*xhat) -& |
| 1162 |
!!$ rcuti4*(qxx_i*6.0_dp*cx_i*d(1))) |
| 1163 |
!!$ dudux_i(2) = dudux_i(2) + sw*pref*(ri3*(qxx_i*6.0_dp*cx_i*yhat) -& |
| 1164 |
!!$ rcuti4*(qxx_i*6.0_dp*cx_i*d(2))) |
| 1165 |
!!$ dudux_i(3) = dudux_i(3) + sw*pref*(ri3*(qxx_i*6.0_dp*cx_i*zhat) -& |
| 1166 |
!!$ rcuti4*(qxx_i*6.0_dp*cx_i*d(3))) |
| 1167 |
!!$ |
| 1168 |
!!$ duduy_i(1) = duduy_i(1) + sw*pref*(ri3*(qyy_i*6.0_dp*cy_i*xhat) -& |
| 1169 |
!!$ rcuti4*(qyy_i*6.0_dp*cx_i*d(1))) |
| 1170 |
!!$ duduy_i(2) = duduy_i(2) + sw*pref*(ri3*(qyy_i*6.0_dp*cy_i*yhat) -& |
| 1171 |
!!$ rcuti4*(qyy_i*6.0_dp*cx_i*d(2))) |
| 1172 |
!!$ duduy_i(3) = duduy_i(3) + sw*pref*(ri3*(qyy_i*6.0_dp*cy_i*zhat) -& |
| 1173 |
!!$ rcuti4*(qyy_i*6.0_dp*cx_i*d(3))) |
| 1174 |
!!$ |
| 1175 |
!!$ duduz_i(1) = duduz_i(1) + sw*pref*(ri3*(qzz_i*6.0_dp*cz_i*xhat) -& |
| 1176 |
!!$ rcuti4*(qzz_i*6.0_dp*cx_i*d(1))) |
| 1177 |
!!$ duduz_i(2) = duduz_i(2) + sw*pref*(ri3*(qzz_i*6.0_dp*cz_i*yhat) -& |
| 1178 |
!!$ rcuti4*(qzz_i*6.0_dp*cx_i*d(2))) |
| 1179 |
!!$ duduz_i(3) = duduz_i(3) + sw*pref*(ri3*(qzz_i*6.0_dp*cz_i*zhat) -& |
| 1180 |
!!$ rcuti4*(qzz_i*6.0_dp*cx_i*d(3))) |
| 1181 |
!!$ |
| 1182 |
!!$ else |
| 1183 |
pref = pre14 * q_j / 3.0_dp |
| 1184 |
vterm = pref * ri3 * (qxx_i * (3.0_dp*cx2 - 1.0_dp) + & |
| 1185 |
qyy_i * (3.0_dp*cy2 - 1.0_dp) + & |
| 1186 |
qzz_i * (3.0_dp*cz2 - 1.0_dp)) |
| 1187 |
vpair = vpair + vterm |
| 1188 |
epot = epot + sw*vterm |
| 1189 |
|
| 1190 |
dudx = dudx - 5.0_dp*sw*vterm*riji*xhat + sw*pref*ri4 * ( & |
| 1191 |
qxx_i*(6.0_dp*cx_i*ux_i(1) - 2.0_dp*xhat) + & |
| 1192 |
qyy_i*(6.0_dp*cy_i*uy_i(1) - 2.0_dp*xhat) + & |
| 1193 |
qzz_i*(6.0_dp*cz_i*uz_i(1) - 2.0_dp*xhat) ) |
| 1194 |
dudy = dudy - 5.0_dp*sw*vterm*riji*yhat + sw*pref*ri4 * ( & |
| 1195 |
qxx_i*(6.0_dp*cx_i*ux_i(2) - 2.0_dp*yhat) + & |
| 1196 |
qyy_i*(6.0_dp*cy_i*uy_i(2) - 2.0_dp*yhat) + & |
| 1197 |
qzz_i*(6.0_dp*cz_i*uz_i(2) - 2.0_dp*yhat) ) |
| 1198 |
dudz = dudz - 5.0_dp*sw*vterm*riji*zhat + sw*pref*ri4 * ( & |
| 1199 |
qxx_i*(6.0_dp*cx_i*ux_i(3) - 2.0_dp*zhat) + & |
| 1200 |
qyy_i*(6.0_dp*cy_i*uy_i(3) - 2.0_dp*zhat) + & |
| 1201 |
qzz_i*(6.0_dp*cz_i*uz_i(3) - 2.0_dp*zhat) ) |
| 1202 |
|
| 1203 |
dudux_i(1) = dudux_i(1) + sw*pref*ri3*(qxx_i*6.0_dp*cx_i*xhat) |
| 1204 |
dudux_i(2) = dudux_i(2) + sw*pref*ri3*(qxx_i*6.0_dp*cx_i*yhat) |
| 1205 |
dudux_i(3) = dudux_i(3) + sw*pref*ri3*(qxx_i*6.0_dp*cx_i*zhat) |
| 1206 |
|
| 1207 |
duduy_i(1) = duduy_i(1) + sw*pref*ri3*(qyy_i*6.0_dp*cy_i*xhat) |
| 1208 |
duduy_i(2) = duduy_i(2) + sw*pref*ri3*(qyy_i*6.0_dp*cy_i*yhat) |
| 1209 |
duduy_i(3) = duduy_i(3) + sw*pref*ri3*(qyy_i*6.0_dp*cy_i*zhat) |
| 1210 |
|
| 1211 |
duduz_i(1) = duduz_i(1) + sw*pref*ri3*(qzz_i*6.0_dp*cz_i*xhat) |
| 1212 |
duduz_i(2) = duduz_i(2) + sw*pref*ri3*(qzz_i*6.0_dp*cz_i*yhat) |
| 1213 |
duduz_i(3) = duduz_i(3) + sw*pref*ri3*(qzz_i*6.0_dp*cz_i*zhat) |
| 1214 |
!!$ endif |
| 1215 |
endif |
| 1216 |
endif |
| 1217 |
|
| 1218 |
|
| 1219 |
if (do_pot) then |
| 1220 |
#ifdef IS_MPI |
| 1221 |
pot_row(ELECTROSTATIC_POT,atom1) = pot_row(ELECTROSTATIC_POT,atom1) + 0.5d0*epot |
| 1222 |
pot_col(ELECTROSTATIC_POT,atom2) = pot_col(ELECTROSTATIC_POT,atom2) + 0.5d0*epot |
| 1223 |
#else |
| 1224 |
pot = pot + epot |
| 1225 |
#endif |
| 1226 |
endif |
| 1227 |
|
| 1228 |
#ifdef IS_MPI |
| 1229 |
f_Row(1,atom1) = f_Row(1,atom1) + dudx |
| 1230 |
f_Row(2,atom1) = f_Row(2,atom1) + dudy |
| 1231 |
f_Row(3,atom1) = f_Row(3,atom1) + dudz |
| 1232 |
|
| 1233 |
f_Col(1,atom2) = f_Col(1,atom2) - dudx |
| 1234 |
f_Col(2,atom2) = f_Col(2,atom2) - dudy |
| 1235 |
f_Col(3,atom2) = f_Col(3,atom2) - dudz |
| 1236 |
|
| 1237 |
if (i_is_Dipole .or. i_is_Quadrupole) then |
| 1238 |
t_Row(1,atom1)=t_Row(1,atom1) - uz_i(2)*duduz_i(3) + uz_i(3)*duduz_i(2) |
| 1239 |
t_Row(2,atom1)=t_Row(2,atom1) - uz_i(3)*duduz_i(1) + uz_i(1)*duduz_i(3) |
| 1240 |
t_Row(3,atom1)=t_Row(3,atom1) - uz_i(1)*duduz_i(2) + uz_i(2)*duduz_i(1) |
| 1241 |
endif |
| 1242 |
if (i_is_Quadrupole) then |
| 1243 |
t_Row(1,atom1)=t_Row(1,atom1) - ux_i(2)*dudux_i(3) + ux_i(3)*dudux_i(2) |
| 1244 |
t_Row(2,atom1)=t_Row(2,atom1) - ux_i(3)*dudux_i(1) + ux_i(1)*dudux_i(3) |
| 1245 |
t_Row(3,atom1)=t_Row(3,atom1) - ux_i(1)*dudux_i(2) + ux_i(2)*dudux_i(1) |
| 1246 |
|
| 1247 |
t_Row(1,atom1)=t_Row(1,atom1) - uy_i(2)*duduy_i(3) + uy_i(3)*duduy_i(2) |
| 1248 |
t_Row(2,atom1)=t_Row(2,atom1) - uy_i(3)*duduy_i(1) + uy_i(1)*duduy_i(3) |
| 1249 |
t_Row(3,atom1)=t_Row(3,atom1) - uy_i(1)*duduy_i(2) + uy_i(2)*duduy_i(1) |
| 1250 |
endif |
| 1251 |
|
| 1252 |
if (j_is_Dipole .or. j_is_Quadrupole) then |
| 1253 |
t_Col(1,atom2)=t_Col(1,atom2) - uz_j(2)*duduz_j(3) + uz_j(3)*duduz_j(2) |
| 1254 |
t_Col(2,atom2)=t_Col(2,atom2) - uz_j(3)*duduz_j(1) + uz_j(1)*duduz_j(3) |
| 1255 |
t_Col(3,atom2)=t_Col(3,atom2) - uz_j(1)*duduz_j(2) + uz_j(2)*duduz_j(1) |
| 1256 |
endif |
| 1257 |
if (j_is_Quadrupole) then |
| 1258 |
t_Col(1,atom2)=t_Col(1,atom2) - ux_j(2)*dudux_j(3) + ux_j(3)*dudux_j(2) |
| 1259 |
t_Col(2,atom2)=t_Col(2,atom2) - ux_j(3)*dudux_j(1) + ux_j(1)*dudux_j(3) |
| 1260 |
t_Col(3,atom2)=t_Col(3,atom2) - ux_j(1)*dudux_j(2) + ux_j(2)*dudux_j(1) |
| 1261 |
|
| 1262 |
t_Col(1,atom2)=t_Col(1,atom2) - uy_j(2)*duduy_j(3) + uy_j(3)*duduy_j(2) |
| 1263 |
t_Col(2,atom2)=t_Col(2,atom2) - uy_j(3)*duduy_j(1) + uy_j(1)*duduy_j(3) |
| 1264 |
t_Col(3,atom2)=t_Col(3,atom2) - uy_j(1)*duduy_j(2) + uy_j(2)*duduy_j(1) |
| 1265 |
endif |
| 1266 |
|
| 1267 |
#else |
| 1268 |
f(1,atom1) = f(1,atom1) + dudx |
| 1269 |
f(2,atom1) = f(2,atom1) + dudy |
| 1270 |
f(3,atom1) = f(3,atom1) + dudz |
| 1271 |
|
| 1272 |
f(1,atom2) = f(1,atom2) - dudx |
| 1273 |
f(2,atom2) = f(2,atom2) - dudy |
| 1274 |
f(3,atom2) = f(3,atom2) - dudz |
| 1275 |
|
| 1276 |
if (i_is_Dipole .or. i_is_Quadrupole) then |
| 1277 |
t(1,atom1)=t(1,atom1) - uz_i(2)*duduz_i(3) + uz_i(3)*duduz_i(2) |
| 1278 |
t(2,atom1)=t(2,atom1) - uz_i(3)*duduz_i(1) + uz_i(1)*duduz_i(3) |
| 1279 |
t(3,atom1)=t(3,atom1) - uz_i(1)*duduz_i(2) + uz_i(2)*duduz_i(1) |
| 1280 |
endif |
| 1281 |
if (i_is_Quadrupole) then |
| 1282 |
t(1,atom1)=t(1,atom1) - ux_i(2)*dudux_i(3) + ux_i(3)*dudux_i(2) |
| 1283 |
t(2,atom1)=t(2,atom1) - ux_i(3)*dudux_i(1) + ux_i(1)*dudux_i(3) |
| 1284 |
t(3,atom1)=t(3,atom1) - ux_i(1)*dudux_i(2) + ux_i(2)*dudux_i(1) |
| 1285 |
|
| 1286 |
t(1,atom1)=t(1,atom1) - uy_i(2)*duduy_i(3) + uy_i(3)*duduy_i(2) |
| 1287 |
t(2,atom1)=t(2,atom1) - uy_i(3)*duduy_i(1) + uy_i(1)*duduy_i(3) |
| 1288 |
t(3,atom1)=t(3,atom1) - uy_i(1)*duduy_i(2) + uy_i(2)*duduy_i(1) |
| 1289 |
endif |
| 1290 |
|
| 1291 |
if (j_is_Dipole .or. j_is_Quadrupole) then |
| 1292 |
t(1,atom2)=t(1,atom2) - uz_j(2)*duduz_j(3) + uz_j(3)*duduz_j(2) |
| 1293 |
t(2,atom2)=t(2,atom2) - uz_j(3)*duduz_j(1) + uz_j(1)*duduz_j(3) |
| 1294 |
t(3,atom2)=t(3,atom2) - uz_j(1)*duduz_j(2) + uz_j(2)*duduz_j(1) |
| 1295 |
endif |
| 1296 |
if (j_is_Quadrupole) then |
| 1297 |
t(1,atom2)=t(1,atom2) - ux_j(2)*dudux_j(3) + ux_j(3)*dudux_j(2) |
| 1298 |
t(2,atom2)=t(2,atom2) - ux_j(3)*dudux_j(1) + ux_j(1)*dudux_j(3) |
| 1299 |
t(3,atom2)=t(3,atom2) - ux_j(1)*dudux_j(2) + ux_j(2)*dudux_j(1) |
| 1300 |
|
| 1301 |
t(1,atom2)=t(1,atom2) - uy_j(2)*duduy_j(3) + uy_j(3)*duduy_j(2) |
| 1302 |
t(2,atom2)=t(2,atom2) - uy_j(3)*duduy_j(1) + uy_j(1)*duduy_j(3) |
| 1303 |
t(3,atom2)=t(3,atom2) - uy_j(1)*duduy_j(2) + uy_j(2)*duduy_j(1) |
| 1304 |
endif |
| 1305 |
|
| 1306 |
#endif |
| 1307 |
|
| 1308 |
#ifdef IS_MPI |
| 1309 |
id1 = AtomRowToGlobal(atom1) |
| 1310 |
id2 = AtomColToGlobal(atom2) |
| 1311 |
#else |
| 1312 |
id1 = atom1 |
| 1313 |
id2 = atom2 |
| 1314 |
#endif |
| 1315 |
|
| 1316 |
if (molMembershipList(id1) .ne. molMembershipList(id2)) then |
| 1317 |
|
| 1318 |
fpair(1) = fpair(1) + dudx |
| 1319 |
fpair(2) = fpair(2) + dudy |
| 1320 |
fpair(3) = fpair(3) + dudz |
| 1321 |
|
| 1322 |
endif |
| 1323 |
|
| 1324 |
return |
| 1325 |
end subroutine doElectrostaticPair |
| 1326 |
|
| 1327 |
subroutine destroyElectrostaticTypes() |
| 1328 |
|
| 1329 |
if(allocated(ElectrostaticMap)) deallocate(ElectrostaticMap) |
| 1330 |
|
| 1331 |
end subroutine destroyElectrostaticTypes |
| 1332 |
|
| 1333 |
subroutine self_self(atom1, eFrame, mypot, t, do_pot) |
| 1334 |
logical, intent(in) :: do_pot |
| 1335 |
integer, intent(in) :: atom1 |
| 1336 |
integer :: atid1 |
| 1337 |
real(kind=dp), dimension(9,nLocal) :: eFrame |
| 1338 |
real(kind=dp), dimension(3,nLocal) :: t |
| 1339 |
real(kind=dp) :: mu1, c1 |
| 1340 |
real(kind=dp) :: preVal, epot, mypot |
| 1341 |
real(kind=dp) :: eix, eiy, eiz |
| 1342 |
|
| 1343 |
! this is a local only array, so we use the local atom type id's: |
| 1344 |
atid1 = atid(atom1) |
| 1345 |
|
| 1346 |
if (.not.summationMethodChecked) then |
| 1347 |
call checkSummationMethod() |
| 1348 |
endif |
| 1349 |
|
| 1350 |
if (summationMethod .eq. REACTION_FIELD) then |
| 1351 |
if (ElectrostaticMap(atid1)%is_Dipole) then |
| 1352 |
mu1 = getDipoleMoment(atid1) |
| 1353 |
|
| 1354 |
preVal = pre22 * preRF2 * mu1*mu1 |
| 1355 |
mypot = mypot - 0.5d0*preVal |
| 1356 |
|
| 1357 |
! The self-correction term adds into the reaction field vector |
| 1358 |
|
| 1359 |
eix = preVal * eFrame(3,atom1) |
| 1360 |
eiy = preVal * eFrame(6,atom1) |
| 1361 |
eiz = preVal * eFrame(9,atom1) |
| 1362 |
|
| 1363 |
! once again, this is self-self, so only the local arrays are needed |
| 1364 |
! even for MPI jobs: |
| 1365 |
|
| 1366 |
t(1,atom1)=t(1,atom1) - eFrame(6,atom1)*eiz + & |
| 1367 |
eFrame(9,atom1)*eiy |
| 1368 |
t(2,atom1)=t(2,atom1) - eFrame(9,atom1)*eix + & |
| 1369 |
eFrame(3,atom1)*eiz |
| 1370 |
t(3,atom1)=t(3,atom1) - eFrame(3,atom1)*eiy + & |
| 1371 |
eFrame(6,atom1)*eix |
| 1372 |
|
| 1373 |
endif |
| 1374 |
|
| 1375 |
elseif (summationMethod .eq. SHIFTED_FORCE) then |
| 1376 |
if (ElectrostaticMap(atid1)%is_Charge) then |
| 1377 |
c1 = getCharge(atid1) |
| 1378 |
|
| 1379 |
if (screeningMethod .eq. DAMPED) then |
| 1380 |
mypot = mypot - (f0c * rcuti * 0.5_dp + & |
| 1381 |
dampingAlpha*invRootPi) * c1 * c1 |
| 1382 |
|
| 1383 |
else |
| 1384 |
mypot = mypot - (rcuti * 0.5_dp * c1 * c1) |
| 1385 |
|
| 1386 |
endif |
| 1387 |
endif |
| 1388 |
endif |
| 1389 |
|
| 1390 |
return |
| 1391 |
end subroutine self_self |
| 1392 |
|
| 1393 |
subroutine rf_self_excludes(atom1, atom2, sw, eFrame, d, rij, vpair, myPot, & |
| 1394 |
f, t, do_pot) |
| 1395 |
logical, intent(in) :: do_pot |
| 1396 |
integer, intent(in) :: atom1 |
| 1397 |
integer, intent(in) :: atom2 |
| 1398 |
logical :: i_is_Charge, j_is_Charge |
| 1399 |
logical :: i_is_Dipole, j_is_Dipole |
| 1400 |
integer :: atid1 |
| 1401 |
integer :: atid2 |
| 1402 |
real(kind=dp), intent(in) :: rij |
| 1403 |
real(kind=dp), intent(in) :: sw |
| 1404 |
real(kind=dp), intent(in), dimension(3) :: d |
| 1405 |
real(kind=dp), intent(inout) :: vpair |
| 1406 |
real(kind=dp), dimension(9,nLocal) :: eFrame |
| 1407 |
real(kind=dp), dimension(3,nLocal) :: f |
| 1408 |
real(kind=dp), dimension(3,nLocal) :: t |
| 1409 |
real (kind = dp), dimension(3) :: duduz_i |
| 1410 |
real (kind = dp), dimension(3) :: duduz_j |
| 1411 |
real (kind = dp), dimension(3) :: uz_i |
| 1412 |
real (kind = dp), dimension(3) :: uz_j |
| 1413 |
real(kind=dp) :: q_i, q_j, mu_i, mu_j |
| 1414 |
real(kind=dp) :: xhat, yhat, zhat |
| 1415 |
real(kind=dp) :: ct_i, ct_j |
| 1416 |
real(kind=dp) :: ri2, ri3, riji, vterm |
| 1417 |
real(kind=dp) :: pref, preVal, rfVal, myPot |
| 1418 |
real(kind=dp) :: dudx, dudy, dudz, dudr |
| 1419 |
|
| 1420 |
if (.not.summationMethodChecked) then |
| 1421 |
call checkSummationMethod() |
| 1422 |
endif |
| 1423 |
|
| 1424 |
dudx = 0.0d0 |
| 1425 |
dudy = 0.0d0 |
| 1426 |
dudz = 0.0d0 |
| 1427 |
|
| 1428 |
riji = 1.0d0/rij |
| 1429 |
|
| 1430 |
xhat = d(1) * riji |
| 1431 |
yhat = d(2) * riji |
| 1432 |
zhat = d(3) * riji |
| 1433 |
|
| 1434 |
! this is a local only array, so we use the local atom type id's: |
| 1435 |
atid1 = atid(atom1) |
| 1436 |
atid2 = atid(atom2) |
| 1437 |
i_is_Charge = ElectrostaticMap(atid1)%is_Charge |
| 1438 |
j_is_Charge = ElectrostaticMap(atid2)%is_Charge |
| 1439 |
i_is_Dipole = ElectrostaticMap(atid1)%is_Dipole |
| 1440 |
j_is_Dipole = ElectrostaticMap(atid2)%is_Dipole |
| 1441 |
|
| 1442 |
if (i_is_Charge.and.j_is_Charge) then |
| 1443 |
q_i = ElectrostaticMap(atid1)%charge |
| 1444 |
q_j = ElectrostaticMap(atid2)%charge |
| 1445 |
|
| 1446 |
preVal = pre11 * q_i * q_j |
| 1447 |
rfVal = preRF*rij*rij |
| 1448 |
vterm = preVal * rfVal |
| 1449 |
|
| 1450 |
myPot = myPot + sw*vterm |
| 1451 |
|
| 1452 |
dudr = sw*preVal * 2.0d0*rfVal*riji |
| 1453 |
|
| 1454 |
dudx = dudx + dudr * xhat |
| 1455 |
dudy = dudy + dudr * yhat |
| 1456 |
dudz = dudz + dudr * zhat |
| 1457 |
|
| 1458 |
elseif (i_is_Charge.and.j_is_Dipole) then |
| 1459 |
q_i = ElectrostaticMap(atid1)%charge |
| 1460 |
mu_j = ElectrostaticMap(atid2)%dipole_moment |
| 1461 |
uz_j(1) = eFrame(3,atom2) |
| 1462 |
uz_j(2) = eFrame(6,atom2) |
| 1463 |
uz_j(3) = eFrame(9,atom2) |
| 1464 |
ct_j = uz_j(1)*xhat + uz_j(2)*yhat + uz_j(3)*zhat |
| 1465 |
|
| 1466 |
ri2 = riji * riji |
| 1467 |
ri3 = ri2 * riji |
| 1468 |
|
| 1469 |
pref = pre12 * q_i * mu_j |
| 1470 |
vterm = - pref * ct_j * ( ri2 - preRF2*rij ) |
| 1471 |
myPot = myPot + sw*vterm |
| 1472 |
|
| 1473 |
dudx = dudx - sw*pref*( ri3*(uz_j(1)-3.0d0*ct_j*xhat) & |
| 1474 |
- preRF2*uz_j(1) ) |
| 1475 |
dudy = dudy - sw*pref*( ri3*(uz_j(2)-3.0d0*ct_j*yhat) & |
| 1476 |
- preRF2*uz_j(2) ) |
| 1477 |
dudz = dudz - sw*pref*( ri3*(uz_j(3)-3.0d0*ct_j*zhat) & |
| 1478 |
- preRF2*uz_j(3) ) |
| 1479 |
|
| 1480 |
duduz_j(1) = duduz_j(1) - sw * pref * xhat * ( ri2 - preRF2*rij ) |
| 1481 |
duduz_j(2) = duduz_j(2) - sw * pref * yhat * ( ri2 - preRF2*rij ) |
| 1482 |
duduz_j(3) = duduz_j(3) - sw * pref * zhat * ( ri2 - preRF2*rij ) |
| 1483 |
|
| 1484 |
elseif (i_is_Dipole.and.j_is_Charge) then |
| 1485 |
mu_i = ElectrostaticMap(atid1)%dipole_moment |
| 1486 |
q_j = ElectrostaticMap(atid2)%charge |
| 1487 |
uz_i(1) = eFrame(3,atom1) |
| 1488 |
uz_i(2) = eFrame(6,atom1) |
| 1489 |
uz_i(3) = eFrame(9,atom1) |
| 1490 |
ct_i = uz_i(1)*xhat + uz_i(2)*yhat + uz_i(3)*zhat |
| 1491 |
|
| 1492 |
ri2 = riji * riji |
| 1493 |
ri3 = ri2 * riji |
| 1494 |
|
| 1495 |
pref = pre12 * q_j * mu_i |
| 1496 |
vterm = pref * ct_i * ( ri2 - preRF2*rij ) |
| 1497 |
myPot = myPot + sw*vterm |
| 1498 |
|
| 1499 |
dudx = dudx + sw*pref*( ri3*(uz_i(1)-3.0d0*ct_i*xhat) & |
| 1500 |
- preRF2*uz_i(1) ) |
| 1501 |
dudy = dudy + sw*pref*( ri3*(uz_i(2)-3.0d0*ct_i*yhat) & |
| 1502 |
- preRF2*uz_i(2) ) |
| 1503 |
dudz = dudz + sw*pref*( ri3*(uz_i(3)-3.0d0*ct_i*zhat) & |
| 1504 |
- preRF2*uz_i(3) ) |
| 1505 |
|
| 1506 |
duduz_i(1) = duduz_i(1) + sw * pref * xhat * ( ri2 - preRF2*rij ) |
| 1507 |
duduz_i(2) = duduz_i(2) + sw * pref * yhat * ( ri2 - preRF2*rij ) |
| 1508 |
duduz_i(3) = duduz_i(3) + sw * pref * zhat * ( ri2 - preRF2*rij ) |
| 1509 |
|
| 1510 |
endif |
| 1511 |
|
| 1512 |
|
| 1513 |
! accumulate the forces and torques resulting from the self term |
| 1514 |
f(1,atom1) = f(1,atom1) + dudx |
| 1515 |
f(2,atom1) = f(2,atom1) + dudy |
| 1516 |
f(3,atom1) = f(3,atom1) + dudz |
| 1517 |
|
| 1518 |
f(1,atom2) = f(1,atom2) - dudx |
| 1519 |
f(2,atom2) = f(2,atom2) - dudy |
| 1520 |
f(3,atom2) = f(3,atom2) - dudz |
| 1521 |
|
| 1522 |
if (i_is_Dipole) then |
| 1523 |
t(1,atom1)=t(1,atom1) - uz_i(2)*duduz_i(3) + uz_i(3)*duduz_i(2) |
| 1524 |
t(2,atom1)=t(2,atom1) - uz_i(3)*duduz_i(1) + uz_i(1)*duduz_i(3) |
| 1525 |
t(3,atom1)=t(3,atom1) - uz_i(1)*duduz_i(2) + uz_i(2)*duduz_i(1) |
| 1526 |
elseif (j_is_Dipole) then |
| 1527 |
t(1,atom2)=t(1,atom2) - uz_j(2)*duduz_j(3) + uz_j(3)*duduz_j(2) |
| 1528 |
t(2,atom2)=t(2,atom2) - uz_j(3)*duduz_j(1) + uz_j(1)*duduz_j(3) |
| 1529 |
t(3,atom2)=t(3,atom2) - uz_j(1)*duduz_j(2) + uz_j(2)*duduz_j(1) |
| 1530 |
endif |
| 1531 |
|
| 1532 |
return |
| 1533 |
end subroutine rf_self_excludes |
| 1534 |
|
| 1535 |
end module electrostatic_module |
