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Comparing trunk/OOPSE-4/src/UseTheForce/DarkSide/gb.F90 (file contents):
Revision 2361 by gezelter, Wed Oct 12 21:00:50 2005 UTC vs.
Revision 2958 by xsun, Mon Jul 24 14:51:09 2006 UTC

# Line 40 | Line 40 | module gb_pair
40   !!
41  
42  
43 < module gb_pair
43 > module gayberne
44    use force_globals
45    use definitions
46    use simulation
47 +  use atype_module
48 +  use vector_class
49 +  use linearalgebra
50 +  use status
51 +  use lj
52 +  use fForceOptions
53   #ifdef IS_MPI
54    use mpiSimulation
55   #endif
56    
57    implicit none
58  
59 <  PRIVATE
59 >  private
60 >
61   #define __FORTRAN90
62   #include "UseTheForce/DarkSide/fInteractionMap.h"
63  
64 <  logical, save :: gb_pair_initialized = .false.
65 <  real(kind=dp), save :: gb_sigma
66 <  real(kind=dp), save :: gb_l2b_ratio
67 <  real(kind=dp), save :: gb_eps
61 <  real(kind=dp), save :: gb_eps_ratio
62 <  real(kind=dp), save :: gb_mu
63 <  real(kind=dp), save :: gb_nu
64 >  logical, save :: haveGBMap = .false.
65 >  logical, save :: haveMixingMap = .false.
66 >  real(kind=dp), save :: mu = 2.0_dp
67 >  real(kind=dp), save :: nu = 1.0_dp
68  
69 <  public :: check_gb_pair_FF
70 <  public :: set_gb_pair_params
69 >
70 >  public :: newGBtype
71 >  public :: complete_GB_FF
72    public :: do_gb_pair
73    public :: getGayBerneCut
74 +  public :: destroyGBtypes
75  
76 +  type :: GBtype
77 +     integer          :: atid
78 +     real(kind = dp ) :: d
79 +     real(kind = dp ) :: l
80 +     real(kind = dp ) :: eps
81 +     real(kind = dp ) :: eps_ratio
82 +     real(kind = dp ) :: dw
83 +     logical          :: isLJ
84 +  end type GBtype
85 +  
86 +  type, private :: GBList
87 +     integer               :: nGBtypes = 0
88 +     integer               :: currentGBtype = 0
89 +     type(GBtype), pointer :: GBtypes(:)      => null()
90 +     integer, pointer      :: atidToGBtype(:) => null()
91 +  end type GBList
92 +  
93 +  type(GBList), save :: GBMap
94 +  
95 +  type :: GBMixParameters
96 +     real(kind=DP) :: sigma0
97 +     real(kind=DP) :: eps0
98 +     real(kind=DP) :: dw
99 +     real(kind=DP) :: x2
100 +     real(kind=DP) :: xa2
101 +     real(kind=DP) :: xai2
102 +     real(kind=DP) :: xp2
103 +     real(kind=DP) :: xpap2
104 +     real(kind=DP) :: xpapi2
105 +  end type GBMixParameters
106 +  
107 +  type(GBMixParameters), dimension(:,:), allocatable :: GBMixingMap
108 +  
109   contains
110 <
111 <  subroutine check_gb_pair_FF(status)
112 <    integer :: status
113 <    status = -1
114 <    if (gb_pair_initialized) status = 0
110 >  
111 >  subroutine newGBtype(c_ident, d, l, eps, eps_ratio, dw, status)
112 >    
113 >    integer, intent(in) :: c_ident
114 >    real( kind = dp ), intent(in) :: d, l, eps, eps_ratio, dw
115 >    integer, intent(out) :: status
116 >    
117 >    integer :: nGBTypes, nLJTypes, ntypes, myATID
118 >    integer, pointer :: MatchList(:) => null()
119 >    integer :: current, i
120 >    status = 0
121 >    
122 >    if (.not.associated(GBMap%GBtypes)) then
123 >      
124 >       call getMatchingElementList(atypes, "is_GayBerne", .true., &
125 >            nGBtypes, MatchList)
126 >      
127 >       call getMatchingElementList(atypes, "is_LennardJones", .true., &
128 >            nLJTypes, MatchList)
129 >      
130 >       GBMap%nGBtypes = nGBtypes + nLJTypes
131 >      
132 >       allocate(GBMap%GBtypes(nGBtypes + nLJTypes))
133 >      
134 >       ntypes = getSize(atypes)
135 >      
136 >       allocate(GBMap%atidToGBtype(ntypes))      
137 >    endif
138 >    
139 >    GBMap%currentGBtype = GBMap%currentGBtype + 1
140 >    current = GBMap%currentGBtype
141 >    
142 >    myATID = getFirstMatchingElement(atypes, "c_ident", c_ident)
143 >    
144 >    GBMap%atidToGBtype(myATID)       = current
145 >    GBMap%GBtypes(current)%atid      = myATID
146 >    GBMap%GBtypes(current)%d         = d
147 >    GBMap%GBtypes(current)%l         = l
148 >    GBMap%GBtypes(current)%eps       = eps
149 >    GBMap%GBtypes(current)%eps_ratio = eps_ratio
150 >    GBMap%GBtypes(current)%dw        = dw
151 >    GBMap%GBtypes(current)%isLJ      = .false.
152 >    
153      return
154 <  end subroutine check_gb_pair_FF
154 >  end subroutine newGBtype
155 >  
156 >  subroutine complete_GB_FF(status)
157 >    integer :: status
158 >    integer :: i, j, l, m, lm, function_type
159 >    real(kind=dp) :: thisDP, sigma
160 >    integer :: alloc_stat, iTheta, iPhi, nSteps, nAtypes, myATID, current
161 >    logical :: thisProperty
162 >    
163 >    status = 0
164 >    if (GBMap%currentGBtype == 0) then
165 >       call handleError("complete_GB_FF", "No members in GBMap")
166 >       status = -1
167 >       return
168 >    end if
169 >    
170 >    nAtypes = getSize(atypes)
171 >    
172 >    if (nAtypes == 0) then
173 >       status = -1
174 >       return
175 >    end if
176 >    
177 >    ! atypes comes from c side
178 >    do i = 1, nAtypes
179 >      
180 >       myATID = getFirstMatchingElement(atypes, 'c_ident', i)
181 >       call getElementProperty(atypes, myATID, "is_LennardJones", thisProperty)
182 >      
183 >       if (thisProperty) then
184 >          GBMap%currentGBtype = GBMap%currentGBtype + 1
185 >          current = GBMap%currentGBtype
186 >          
187 >          GBMap%atidToGBtype(myATID) = current
188 >          GBMap%GBtypes(current)%atid      = myATID      
189 >          GBMap%GBtypes(current)%isLJ      = .true.          
190 >          GBMap%GBtypes(current)%d         = getSigma(myATID) / sqrt(2.0_dp)
191 >          GBMap%GBtypes(current)%l         = GBMap%GBtypes(current)%d
192 >          GBMap%GBtypes(current)%eps       = getEpsilon(myATID)
193 >          GBMap%GBtypes(current)%eps_ratio = 1.0_dp
194 >          GBMap%GBtypes(current)%dw        = 1.0_dp
195 >          
196 >       endif
197 >      
198 >    end do
199 >    
200 >    haveGBMap = .true.
201  
202 <  subroutine set_gb_pair_params(sigma, l2b_ratio, eps, eps_ratio, mu, nu)
203 <    real( kind = dp ), intent(in) :: sigma, l2b_ratio, eps, eps_ratio
81 <    real( kind = dp ), intent(in) :: mu, nu
82 <  
83 <    gb_sigma = sigma
84 <    gb_l2b_ratio = l2b_ratio
85 <    gb_eps = eps
86 <    gb_eps_ratio = eps_ratio
87 <    gb_mu = mu
88 <    gb_nu = nu
202 >    
203 >  end subroutine complete_GB_FF
204  
205 <    gb_pair_initialized = .true.
206 <    return
207 <  end subroutine set_gb_pair_params
205 >  subroutine createGBMixingMap()
206 >    integer :: nGBtypes, i, j
207 >    real (kind = dp) :: d1, l1, e1, er1, dw1
208 >    real (kind = dp) :: d2, l2, e2, er2, dw2
209 >    real (kind = dp) :: er, ermu, xp, ap2
210  
211 +    if (GBMap%currentGBtype == 0) then
212 +       call handleError("GB", "No members in GBMap")
213 +       return
214 +    end if
215 +    
216 +    nGBtypes = GBMap%nGBtypes
217 +
218 +    if (.not. allocated(GBMixingMap)) then
219 +       allocate(GBMixingMap(nGBtypes, nGBtypes))
220 +    endif
221 +
222 +    do i = 1, nGBtypes
223 +
224 +       d1 = GBMap%GBtypes(i)%d
225 +       l1 = GBMap%GBtypes(i)%l
226 +       e1 = GBMap%GBtypes(i)%eps
227 +       er1 = GBMap%GBtypes(i)%eps_ratio
228 +       dw1 = GBMap%GBtypes(i)%dw
229 +
230 +       do j = 1, nGBtypes
231 +
232 +          d2 = GBMap%GBtypes(j)%d
233 +          l2 = GBMap%GBtypes(j)%l
234 +          e2 = GBMap%GBtypes(j)%eps
235 +          er2 = GBMap%GBtypes(j)%eps_ratio
236 +          dw2 = GBMap%GBtypes(j)%dw
237 +
238 + !  Cleaver paper uses sqrt of squares to get sigma0 for
239 + !  mixed interactions.
240 +            
241 +          GBMixingMap(i,j)%sigma0 = sqrt(d1*d1 + d2*d2)
242 +          GBMixingMap(i,j)%xa2 = (l1*l1 - d1*d1)/(l1*l1 + d2*d2)
243 +          GBMixingMap(i,j)%xai2 = (l2*l2 - d2*d2)/(l2*l2 + d1*d1)
244 +          GBMixingMap(i,j)%x2 = (l1*l1 - d1*d1) * (l2*l2 - d2*d2) / &
245 +               ((l2*l2 + d1*d1) * (l1*l1 + d2*d2))
246 +
247 +          ! assumed LB mixing rules for now:
248 +
249 +          GBMixingMap(i,j)%dw = 0.5_dp * (dw1 + dw2)
250 +          GBMixingMap(i,j)%eps0 = sqrt(e1 * e2)
251 +
252 +          er = sqrt(er1 * er2)
253 +          ermu = er**(1.0_dp / mu)
254 +          xp = (1.0_dp - ermu) / (1.0_dp + ermu)
255 +          ap2 = 1.0_dp / (1.0_dp + ermu)
256 +
257 +          GBMixingMap(i,j)%xp2 = xp*xp
258 +          GBMixingMap(i,j)%xpap2 = xp*ap2
259 +          GBMixingMap(i,j)%xpapi2 = xp/ap2
260 +       enddo
261 +    enddo
262 +    haveMixingMap = .true.
263 +    mu = getGayBerneMu()
264 +    nu = getGayBerneNu()    
265 +  end subroutine createGBMixingMap
266 +  
267 +
268    !! gay berne cutoff should be a parameter in globals, this is a temporary
269    !! work around - this should be fixed when gay berne is up and running
270 +
271    function getGayBerneCut(atomID) result(cutValue)
272 <    integer, intent(in) :: atomID !! nah... we don't need to use this...
273 <    real(kind=dp) :: cutValue
272 >    integer, intent(in) :: atomID
273 >    integer :: gbt1
274 >    real(kind=dp) :: cutValue, l, d
275  
276 <    cutValue = gb_l2b_ratio*gb_sigma*2.5_dp
276 >    if (GBMap%currentGBtype == 0) then
277 >       call handleError("GB", "No members in GBMap")
278 >       return
279 >    end if
280 >
281 >    gbt1 = GBMap%atidToGBtype(atomID)
282 >    l = GBMap%GBtypes(gbt1)%l
283 >    d = GBMap%GBtypes(gbt1)%d  
284 >
285 >    ! sigma is actually sqrt(2)*l  for prolate ellipsoids
286 >    
287 >    cutValue = 2.5_dp*sqrt(2.0_dp)*max(l,d)
288 >
289    end function getGayBerneCut
290  
291    subroutine do_gb_pair(atom1, atom2, d, r, r2, sw, vpair, fpair, &
292 <       pot, A, f, t, do_pot)
292 >       pot, Amat, f, t, do_pot)
293      
294      integer, intent(in) :: atom1, atom2
295 <    integer :: id1, id2
295 >    integer :: atid1, atid2, gbt1, gbt2, id1, id2
296      real (kind=dp), intent(inout) :: r, r2
297      real (kind=dp), dimension(3), intent(in) :: d
298      real (kind=dp), dimension(3), intent(inout) :: fpair
299      real (kind=dp) :: pot, sw, vpair
300 <    real (kind=dp), dimension(9,nLocal) :: A
300 >    real (kind=dp), dimension(9,nLocal) :: Amat
301      real (kind=dp), dimension(3,nLocal) :: f
302      real (kind=dp), dimension(3,nLocal) :: t
303      logical, intent(in) :: do_pot
304 <    real (kind = dp), dimension(3) :: ul1
117 <    real (kind = dp), dimension(3) :: ul2
304 >    real (kind = dp), dimension(3) :: ul1, ul2, rxu1, rxu2, uxu, rhat
305  
306 <    real(kind=dp) :: chi, chiprime, emu, s2
307 <    real(kind=dp) :: r4, rdotu1, rdotu2, u1dotu2, g, gp, gpi, gmu, gmum
308 <    real(kind=dp) :: curlyE, enu, enum, eps, dotsum, dotdiff, ds2, dd2
309 <    real(kind=dp) :: opXdot, omXdot, opXpdot, omXpdot, pref, gfact
310 <    real(kind=dp) :: BigR, Ri, Ri2, Ri6, Ri7, Ri12, Ri13, R126, R137
124 <    real(kind=dp) :: dru1dx, dru1dy, dru1dz
125 <    real(kind=dp) :: dru2dx, dru2dy, dru2dz
126 <    real(kind=dp) :: dBigRdx, dBigRdy, dBigRdz
127 <    real(kind=dp) :: dBigRdu1x, dBigRdu1y, dBigRdu1z
128 <    real(kind=dp) :: dBigRdu2x, dBigRdu2y, dBigRdu2z
129 <    real(kind=dp) :: dUdx, dUdy, dUdz
130 <    real(kind=dp) :: dUdu1x, dUdu1y, dUdu1z, dUdu2x, dUdu2y, dUdu2z
131 <    real(kind=dp) :: dcE, dcEdu1x, dcEdu1y, dcEdu1z, dcEdu2x, dcEdu2y, dcEdu2z
132 <    real(kind=dp) :: depsdu1x, depsdu1y, depsdu1z, depsdu2x, depsdu2y, depsdu2z
133 <    real(kind=dp) :: drdx, drdy, drdz
134 <    real(kind=dp) :: dgdx, dgdy, dgdz
135 <    real(kind=dp) :: dgdu1x, dgdu1y, dgdu1z, dgdu2x, dgdu2y, dgdu2z
136 <    real(kind=dp) :: dgpdx, dgpdy, dgpdz
137 <    real(kind=dp) :: dgpdu1x, dgpdu1y, dgpdu1z, dgpdu2x, dgpdu2y, dgpdu2z
138 <    real(kind=dp) :: line1a, line1bx, line1by, line1bz
139 <    real(kind=dp) :: line2a, line2bx, line2by, line2bz
140 <    real(kind=dp) :: line3a, line3b, line3, line3x, line3y, line3z
141 <    real(kind=dp) :: term1x, term1y, term1z, term1u1x, term1u1y, term1u1z
142 <    real(kind=dp) :: term1u2x, term1u2y, term1u2z
143 <    real(kind=dp) :: term2a, term2b, term2u1x, term2u1y, term2u1z
144 <    real(kind=dp) :: term2u2x, term2u2y, term2u2z
145 <    real(kind=dp) :: yick1, yick2, mess1, mess2
146 <    
147 <    s2 = (gb_l2b_ratio)**2
148 <    emu = (gb_eps_ratio)**(1.0d0/gb_mu)
306 >    real (kind = dp) :: sigma0, dw, eps0, x2, xa2, xai2, xp2, xpap2, xpapi2
307 >    real (kind = dp) :: e1, e2, eps, sigma, s3, s03, au2, bu2, au, bu, a, b, g, g2
308 >    real (kind = dp) :: U, BigR, R3, R6, R7, R12, R13, H, Hp, fx, fy, fz
309 >    real (kind = dp) :: dUdr, dUda, dUdb, dUdg, pref1, pref2
310 >    logical :: i_is_lj, j_is_lj
311  
312 <    chi = (s2 - 1.0d0)/(s2 + 1.0d0)
313 <    chiprime = (1.0d0 - emu)/(1.0d0 + emu)
312 >    if (.not.haveMixingMap) then
313 >       call createGBMixingMap()
314 >    endif
315  
316 <    r4 = r2*r2
316 > #ifdef IS_MPI
317 >    atid1 = atid_Row(atom1)
318 >    atid2 = atid_Col(atom2)
319 > #else
320 >    atid1 = atid(atom1)
321 >    atid2 = atid(atom2)
322 > #endif
323  
324 +    gbt1 = GBMap%atidToGBtype(atid1)
325 +    gbt2 = GBMap%atidToGBtype(atid2)    
326 +
327 +    i_is_LJ = GBMap%GBTypes(gbt1)%isLJ
328 +    j_is_LJ = GBMap%GBTypes(gbt2)%isLJ
329 +
330 +    sigma0 = GBMixingMap(gbt1, gbt2)%sigma0
331 +    dw     = GBMixingMap(gbt1, gbt2)%dw    
332 +    eps0   = GBMixingMap(gbt1, gbt2)%eps0  
333 +    x2     = GBMixingMap(gbt1, gbt2)%x2    
334 +    xa2    = GBMixingMap(gbt1, gbt2)%xa2  
335 +    xai2   = GBMixingMap(gbt1, gbt2)%xai2  
336 +    xp2    = GBMixingMap(gbt1, gbt2)%xp2  
337 +    xpap2  = GBMixingMap(gbt1, gbt2)%xpap2
338 +    xpapi2 = GBMixingMap(gbt1, gbt2)%xpapi2
339 +    
340   #ifdef IS_MPI
341 <    ul1(1) = A_Row(3,atom1)
342 <    ul1(2) = A_Row(6,atom1)
341 >    ul1(1) = A_Row(7,atom1)
342 >    ul1(2) = A_Row(8,atom1)
343      ul1(3) = A_Row(9,atom1)
344  
345 <    ul2(1) = A_Col(3,atom2)
346 <    ul2(2) = A_Col(6,atom2)
345 >    ul2(1) = A_Col(7,atom2)
346 >    ul2(2) = A_Col(8,atom2)
347      ul2(3) = A_Col(9,atom2)
348   #else
349 <    ul1(1) = A(3,atom1)
350 <    ul1(2) = A(6,atom1)
351 <    ul1(3) = A(9,atom1)
349 >    ul1(1) = Amat(7,atom1)
350 >    ul1(2) = Amat(8,atom1)
351 >    ul1(3) = Amat(9,atom1)
352  
353 <    ul2(1) = A(3,atom2)
354 <    ul2(2) = A(6,atom2)
355 <    ul2(3) = A(9,atom2)
353 >    ul2(1) = Amat(7,atom2)
354 >    ul2(2) = Amat(8,atom2)
355 >    ul2(3) = Amat(9,atom2)
356   #endif
357      
358 <    dru1dx = ul1(1)
359 <    dru2dx = ul2(1)
360 <    dru1dy = ul1(2)
361 <    dru2dy = ul2(2)
362 <    dru1dz = ul1(3)
363 <    dru2dz = ul2(3)
179 <    
180 <    drdx = d(1) / r
181 <    drdy = d(2) / r
182 <    drdz = d(3) / r
183 <    
184 <    ! do some dot products:
185 <    ! NB the r in these dot products is the actual intermolecular vector,
186 <    ! and is not the unit vector in that direction.
187 <    
188 <    rdotu1 = d(1)*ul1(1) + d(2)*ul1(2) + d(3)*ul1(3)
189 <    rdotu2 = d(1)*ul2(1) + d(2)*ul2(2) + d(3)*ul2(3)
190 <    u1dotu2 = ul1(1)*ul2(1) + ul1(2)*ul2(2) +  ul1(3)*ul2(3)
191 <
192 <    ! This stuff is all for the calculation of g(Chi) and dgdx
193 <    ! Line numbers roughly follow the lines in equation A25 of Luckhurst
194 <    !   et al. Liquid Crystals 8, 451-464 (1990).
195 <    ! We note however, that there are some major typos in that Appendix
196 <    ! of the Luckhurst paper, particularly in equations A23, A29 and A31
197 <    ! We have attempted to correct them below.
198 <    
199 <    dotsum = rdotu1+rdotu2
200 <    dotdiff = rdotu1-rdotu2
201 <    ds2 = dotsum*dotsum
202 <    dd2 = dotdiff*dotdiff
203 <  
204 <    opXdot = 1.0d0 + Chi*u1dotu2
205 <    omXdot = 1.0d0 - Chi*u1dotu2
206 <    opXpdot = 1.0d0 + ChiPrime*u1dotu2
207 <    omXpdot = 1.0d0 - ChiPrime*u1dotu2
208 <  
209 <    line1a = dotsum/opXdot
210 <    line1bx = dru1dx + dru2dx
211 <    line1by = dru1dy + dru2dy
212 <    line1bz = dru1dz + dru2dz
213 <    
214 <    line2a = dotdiff/omXdot
215 <    line2bx = dru1dx - dru2dx
216 <    line2by = dru1dy - dru2dy
217 <    line2bz = dru1dz - dru2dz
218 <    
219 <    term1x = -Chi*(line1a*line1bx + line2a*line2bx)/r2
220 <    term1y = -Chi*(line1a*line1by + line2a*line2by)/r2
221 <    term1z = -Chi*(line1a*line1bz + line2a*line2bz)/r2
222 <    
223 <    line3a = ds2/opXdot
224 <    line3b = dd2/omXdot
225 <    line3 = Chi*(line3a + line3b)/r4
226 <    line3x = d(1)*line3
227 <    line3y = d(2)*line3
228 <    line3z = d(3)*line3
229 <    
230 <    dgdx = term1x + line3x
231 <    dgdy = term1y + line3y
232 <    dgdz = term1z + line3z
358 >    if (i_is_LJ) then
359 >       a = 0.0_dp
360 >       ul1 = 0.0_dp
361 >    else
362 >       a = d(1)*ul1(1)   + d(2)*ul1(2)   + d(3)*ul1(3)
363 >    endif
364  
365 <    term1u1x = (line1a+line2a)*dru1dx
366 <    term1u1y = (line1a+line2a)*dru1dy
367 <    term1u1z = (line1a+line2a)*dru1dz
368 <    term1u2x = (line1a-line2a)*dru2dx
369 <    term1u2y = (line1a-line2a)*dru2dy
370 <    term1u2z = (line1a-line2a)*dru2dz
240 <    
241 <    term2a = -line3a/opXdot
242 <    term2b =  line3b/omXdot
243 <    
244 <    term2u1x = Chi*ul2(1)*(term2a + term2b)
245 <    term2u1y = Chi*ul2(2)*(term2a + term2b)
246 <    term2u1z = Chi*ul2(3)*(term2a + term2b)
247 <    term2u2x = Chi*ul1(1)*(term2a + term2b)
248 <    term2u2y = Chi*ul1(2)*(term2a + term2b)
249 <    term2u2z = Chi*ul1(3)*(term2a + term2b)
250 <    
251 <    pref = -Chi*0.5d0/r2
365 >    if (j_is_LJ) then
366 >       b = 0.0_dp
367 >       ul2 = 0.0_dp
368 >    else      
369 >       b = d(1)*ul2(1)   + d(2)*ul2(2)   + d(3)*ul2(3)
370 >    endif
371  
372 <    dgdu1x = pref*(term1u1x+term2u1x)
373 <    dgdu1y = pref*(term1u1y+term2u1y)
374 <    dgdu1z = pref*(term1u1z+term2u1z)
375 <    dgdu2x = pref*(term1u2x+term2u2x)
376 <    dgdu2y = pref*(term1u2y+term2u2y)
258 <    dgdu2z = pref*(term1u2z+term2u2z)
372 >    if (i_is_LJ.or.j_is_LJ) then
373 >       g = 0.0_dp
374 >    else
375 >       g = ul1(1)*ul2(1) + ul1(2)*ul2(2) + ul1(3)*ul2(3)
376 >    endif
377  
378 <    g = 1.0d0 - Chi*(line3a + line3b)/(2.0d0*r2)
379 <  
262 <    BigR = (r - gb_sigma*(g**(-0.5d0)) + gb_sigma)/gb_sigma
263 <    Ri = 1.0d0/BigR
264 <    Ri2 = Ri*Ri
265 <    Ri6 = Ri2*Ri2*Ri2
266 <    Ri7 = Ri6*Ri
267 <    Ri12 = Ri6*Ri6
268 <    Ri13 = Ri6*Ri7
378 >    au = a / r
379 >    bu = b / r
380  
381 <    gfact = (g**(-1.5d0))*0.5d0
381 >    au2 = au * au
382 >    bu2 = bu * bu
383 >    g2 = g * g
384  
385 <    dBigRdx = drdx/gb_sigma + dgdx*gfact
386 <    dBigRdy = drdy/gb_sigma + dgdy*gfact
274 <    dBigRdz = drdz/gb_sigma + dgdz*gfact
385 >    H  = (xa2 * au2 + xai2 * bu2 - 2.0_dp*x2*au*bu*g)  / (1.0_dp - x2*g2)
386 >    Hp = (xpap2*au2 + xpapi2*bu2 - 2.0_dp*xp2*au*bu*g) / (1.0_dp - xp2*g2)
387  
388 <    dBigRdu1x = dgdu1x*gfact
389 <    dBigRdu1y = dgdu1y*gfact
390 <    dBigRdu1z = dgdu1z*gfact
391 <    dBigRdu2x = dgdu2x*gfact
392 <    dBigRdu2y = dgdu2y*gfact
393 <    dBigRdu2z = dgdu2z*gfact
388 >    sigma = sigma0 / sqrt(1.0_dp - H)
389 >    e1 = 1.0_dp / sqrt(1.0_dp - x2*g2)
390 >    e2 = 1.0_dp - Hp
391 >    eps = eps0 * (e1**nu) * (e2**mu)
392 >    BigR = dw*sigma0 / (r - sigma + dw*sigma0)
393 >    
394 >    R3 = BigR*BigR*BigR
395 >    R6 = R3*R3
396 >    R7 = R6 * BigR
397 >    R12 = R6*R6
398 >    R13 = R6*R7
399  
400 <    ! Now, we must do it again for g(ChiPrime) and dgpdx
400 >    U = 4.0_dp * eps * (R12 - R6)
401  
402 <    line1a = dotsum/opXpdot
403 <    line2a = dotdiff/omXpdot
287 <    term1x = -ChiPrime*(line1a*line1bx + line2a*line2bx)/r2
288 <    term1y = -ChiPrime*(line1a*line1by + line2a*line2by)/r2
289 <    term1z = -ChiPrime*(line1a*line1bz + line2a*line2bz)/r2
290 <    line3a = ds2/opXpdot
291 <    line3b = dd2/omXpdot
292 <    line3 = ChiPrime*(line3a + line3b)/r4
293 <    line3x = d(1)*line3
294 <    line3y = d(2)*line3
295 <    line3z = d(3)*line3
296 <    
297 <    dgpdx = term1x + line3x
298 <    dgpdy = term1y + line3y
299 <    dgpdz = term1z + line3z
300 <    
301 <    term1u1x = (line1a+line2a)*dru1dx
302 <    term1u1y = (line1a+line2a)*dru1dy
303 <    term1u1z = (line1a+line2a)*dru1dz
304 <    term1u2x = (line1a-line2a)*dru2dx
305 <    term1u2y = (line1a-line2a)*dru2dy
306 <    term1u2z = (line1a-line2a)*dru2dz
402 >    s3 = sigma*sigma*sigma
403 >    s03 = sigma0*sigma0*sigma0
404  
405 <    term2a = -line3a/opXpdot
309 <    term2b =  line3b/omXpdot
310 <    
311 <    term2u1x = ChiPrime*ul2(1)*(term2a + term2b)
312 <    term2u1y = ChiPrime*ul2(2)*(term2a + term2b)
313 <    term2u1z = ChiPrime*ul2(3)*(term2a + term2b)
314 <    term2u2x = ChiPrime*ul1(1)*(term2a + term2b)
315 <    term2u2y = ChiPrime*ul1(2)*(term2a + term2b)
316 <    term2u2z = ChiPrime*ul1(3)*(term2a + term2b)
317 <  
318 <    pref = -ChiPrime*0.5d0/r2
319 <    
320 <    dgpdu1x = pref*(term1u1x+term2u1x)
321 <    dgpdu1y = pref*(term1u1y+term2u1y)
322 <    dgpdu1z = pref*(term1u1z+term2u1z)
323 <    dgpdu2x = pref*(term1u2x+term2u2x)
324 <    dgpdu2y = pref*(term1u2y+term2u2y)
325 <    dgpdu2z = pref*(term1u2z+term2u2z)
326 <    
327 <    gp = 1.0d0 - ChiPrime*(line3a + line3b)/(2.0d0*r2)
328 <    gmu = gp**gb_mu
329 <    gpi = 1.0d0 / gp
330 <    gmum = gmu*gpi
405 >    pref1 = - 8.0_dp * eps * mu * (R12 - R6) / (e2 * r)
406  
407 <    curlyE = 1.0d0/dsqrt(1.0d0 - Chi*Chi*u1dotu2*u1dotu2)
407 >    pref2 = 8.0_dp * eps * s3 * (6.0_dp*R13 - 3.0_dp*R7) / (dw*r*s03)
408  
409 <    dcE = (curlyE**3)*Chi*Chi*u1dotu2
335 <  
336 <    dcEdu1x = dcE*ul2(1)
337 <    dcEdu1y = dcE*ul2(2)
338 <    dcEdu1z = dcE*ul2(3)
339 <    dcEdu2x = dcE*ul1(1)
340 <    dcEdu2y = dcE*ul1(2)
341 <    dcEdu2z = dcE*ul1(3)
409 >    dUdr = - (pref1 * Hp + pref2 * (sigma0*sigma0*r/s3 + H))
410      
411 <    enu = curlyE**gb_nu
412 <    enum = enu/curlyE
345 <  
346 <    eps = gb_eps*enu*gmu
411 >    dUda = pref1 * (xpap2*au - xp2*bu*g) / (1.0_dp - xp2 * g2) &
412 >         + pref2 * (xa2 * au - x2 *bu*g) / (1.0_dp - x2 * g2)
413  
414 <    yick1 = gb_eps*enu*gb_mu*gmum
415 <    yick2 = gb_eps*gmu*gb_nu*enum
414 >    dUdb = pref1 * (xpapi2*bu - xp2*au*g) / (1.0_dp - xp2 * g2) &
415 >         + pref2 * (xai2 * bu - x2 *au*g) / (1.0_dp - x2 * g2)
416  
417 <    depsdu1x = yick1*dgpdu1x + yick2*dcEdu1x
418 <    depsdu1y = yick1*dgpdu1y + yick2*dcEdu1y
419 <    depsdu1z = yick1*dgpdu1z + yick2*dcEdu1z
420 <    depsdu2x = yick1*dgpdu2x + yick2*dcEdu2x
421 <    depsdu2y = yick1*dgpdu2y + yick2*dcEdu2y
422 <    depsdu2z = yick1*dgpdu2z + yick2*dcEdu2z
417 >    dUdg = 4.0_dp * eps * nu * (R12 - R6) * x2 * g / (1.0_dp - x2*g2) &
418 >         + 8.0_dp * eps * mu * (R12 - R6) * (xp2*au*bu - Hp*xp2*g) / &
419 >         (1.0_dp - xp2 * g2) / e2 &
420 >         + 8.0_dp * eps * s3 * (3.0_dp * R7 - 6.0_dp * R13) * &  
421 >         (x2 * au * bu - H * x2 * g) / (1.0_dp - x2 * g2) / (dw * s03)
422 >
423 >            
424 >    rhat = d / r
425 >
426 >    fx = dUdr * rhat(1) + dUda * ul1(1) + dUdb * ul2(1)
427 >    fy = dUdr * rhat(2) + dUda * ul1(2) + dUdb * ul2(2)
428 >    fz = dUdr * rhat(3) + dUda * ul1(3) + dUdb * ul2(3)    
429 >
430 >    rxu1 = cross_product(d, ul1)
431 >    rxu2 = cross_product(d, ul2)    
432 >    uxu = cross_product(ul1, ul2)
433      
434 <    R126 = Ri12 - Ri6
435 <    R137 = 6.0d0*Ri7 - 12.0d0*Ri13
436 <    
437 <    mess1 = gmu*R137
438 <    mess2 = R126*gb_mu*gmum
439 <    
440 <    dUdx = 4.0d0*gb_eps*enu*(mess1*dBigRdx + mess2*dgpdx)*sw
441 <    dUdy = 4.0d0*gb_eps*enu*(mess1*dBigRdy + mess2*dgpdy)*sw
442 <    dUdz = 4.0d0*gb_eps*enu*(mess1*dBigRdz + mess2*dgpdz)*sw
443 <    
444 <    dUdu1x = 4.0d0*(R126*depsdu1x + eps*R137*dBigRdu1x)*sw
445 <    dUdu1y = 4.0d0*(R126*depsdu1y + eps*R137*dBigRdu1y)*sw
446 <    dUdu1z = 4.0d0*(R126*depsdu1z + eps*R137*dBigRdu1z)*sw
447 <    dUdu2x = 4.0d0*(R126*depsdu2x + eps*R137*dBigRdu2x)*sw
448 <    dUdu2y = 4.0d0*(R126*depsdu2y + eps*R137*dBigRdu2y)*sw
373 <    dUdu2z = 4.0d0*(R126*depsdu2z + eps*R137*dBigRdu2z)*sw
374 <      
434 > !!$    write(*,*) 'pref = ' , pref1, pref2
435 > !!$    write(*,*) 'rxu1 = ' , rxu1(1), rxu1(2), rxu1(3)
436 > !!$    write(*,*) 'rxu2 = ' , rxu2(1), rxu2(2), rxu2(3)
437 > !!$    write(*,*) 'uxu = ' , uxu(1), uxu(2), uxu(3)
438 > !!$    write(*,*) 'dUda = ', dUda, dudb, dudg, dudr
439 > !!$    write(*,*) 'H = ', H,hp,sigma, e1, e2, BigR
440 > !!$    write(*,*) 'chi = ', xa2, xai2, x2
441 > !!$    write(*,*) 'chip = ', xpap2, xpapi2, xp2
442 > !!$    write(*,*) 'eps = ', eps0, e1, e2, eps
443 > !!$    write(*,*) 'U =', U, pref1, pref2
444 > !!$    write(*,*) 'f =', fx, fy, fz
445 > !!$    write(*,*) 'au =', au, bu, g
446 > !!$    
447 >        
448 >  
449   #ifdef IS_MPI
450 <    f_Row(1,atom1) = f_Row(1,atom1) + dUdx
451 <    f_Row(2,atom1) = f_Row(2,atom1) + dUdy
452 <    f_Row(3,atom1) = f_Row(3,atom1) + dUdz
450 >    f_Row(1,atom1) = f_Row(1,atom1) + fx
451 >    f_Row(2,atom1) = f_Row(2,atom1) + fy
452 >    f_Row(3,atom1) = f_Row(3,atom1) + fz
453      
454 <    f_Col(1,atom2) = f_Col(1,atom2) - dUdx
455 <    f_Col(2,atom2) = f_Col(2,atom2) - dUdy
456 <    f_Col(3,atom2) = f_Col(3,atom2) - dUdz
454 >    f_Col(1,atom2) = f_Col(1,atom2) - fx
455 >    f_Col(2,atom2) = f_Col(2,atom2) - fy
456 >    f_Col(3,atom2) = f_Col(3,atom2) - fz
457      
458 <    t_Row(1,atom1) = t_Row(1,atom1) - ul1(2)*dUdu1z + ul1(3)*dUdu1y
459 <    t_Row(2,atom1) = t_Row(2,atom1) - ul1(3)*dUdu1x + ul1(1)*dUdu1z
460 <    t_Row(3,atom1) = t_Row(3,atom1) - ul1(1)*dUdu1y + ul1(2)*dUdu1x
461 <    
462 <    t_Col(1,atom2) = t_Col(1,atom2) - ul2(2)*dUdu2z + ul2(3)*dUdu2y
463 <    t_Col(2,atom2) = t_Col(2,atom2) - ul2(3)*dUdu2x + ul2(1)*dUdu2z
464 <    t_Col(3,atom2) = t_Col(3,atom2) - ul2(1)*dUdu2y + ul2(2)*dUdu2x
458 >    t_Row(1,atom1) = t_Row(1,atom1) + dUda*rxu1(1) - dUdg*uxu(1)
459 >    t_Row(2,atom1) = t_Row(2,atom1) + dUda*rxu1(2) - dUdg*uxu(2)
460 >    t_Row(3,atom1) = t_Row(3,atom1) + dUda*rxu1(3) - dUdg*uxu(3)
461 >                                                                
462 >    t_Col(1,atom2) = t_Col(1,atom2) + dUdb*rxu2(1) + dUdg*uxu(1)
463 >    t_Col(2,atom2) = t_Col(2,atom2) + dUdb*rxu2(2) + dUdg*uxu(2)
464 >    t_Col(3,atom2) = t_Col(3,atom2) + dUdb*rxu2(3) + dUdg*uxu(3)
465   #else
466 <    f(1,atom1) = f(1,atom1) + dUdx
467 <    f(2,atom1) = f(2,atom1) + dUdy
468 <    f(3,atom1) = f(3,atom1) + dUdz
466 >    f(1,atom1) = f(1,atom1) + fx
467 >    f(2,atom1) = f(2,atom1) + fy
468 >    f(3,atom1) = f(3,atom1) + fz
469      
470 <    f(1,atom2) = f(1,atom2) - dUdx
471 <    f(2,atom2) = f(2,atom2) - dUdy
472 <    f(3,atom2) = f(3,atom2) - dUdz
470 >    f(1,atom2) = f(1,atom2) - fx
471 >    f(2,atom2) = f(2,atom2) - fy
472 >    f(3,atom2) = f(3,atom2) - fz
473      
474 <    t(1,atom1) = t(1,atom1) - ul1(2)*dUdu1z + ul1(3)*dUdu1y
475 <    t(2,atom1) = t(2,atom1) - ul1(3)*dUdu1x + ul1(1)*dUdu1z
476 <    t(3,atom1) = t(3,atom1) - ul1(1)*dUdu1y + ul1(2)*dUdu1x
477 <    
478 <    t(1,atom2) = t(1,atom2) - ul2(2)*dUdu2z + ul2(3)*dUdu2y
479 <    t(2,atom2) = t(2,atom2) - ul2(3)*dUdu2x + ul2(1)*dUdu2z
480 <    t(3,atom2) = t(3,atom2) - ul2(1)*dUdu2y + ul2(2)*dUdu2x
474 >    t(1,atom1) = t(1,atom1) +  dUda*rxu1(1) - dUdg*uxu(1)
475 >    t(2,atom1) = t(2,atom1) +  dUda*rxu1(2) - dUdg*uxu(2)
476 >    t(3,atom1) = t(3,atom1) +  dUda*rxu1(3) - dUdg*uxu(3)
477 >                                                        
478 >    t(1,atom2) = t(1,atom2) +  dUdb*rxu2(1) + dUdg*uxu(1)
479 >    t(2,atom2) = t(2,atom2) +  dUdb*rxu2(2) + dUdg*uxu(2)
480 >    t(3,atom2) = t(3,atom2) +  dUdb*rxu2(3) + dUdg*uxu(3)
481   #endif
482 <            
482 >  
483      if (do_pot) then
484   #ifdef IS_MPI
485 <       pot_row(VDW_POT,atom1) = pot_row(VDW_POT,atom1) + 2.0d0*eps*R126*sw
486 <       pot_col(VDW_POT,atom2) = pot_col(VDW_POT,atom2) + 2.0d0*eps*R126*sw
485 >       pot_row(VDW_POT,atom1) = pot_row(VDW_POT,atom1) + 0.5d0*U*sw
486 >       pot_col(VDW_POT,atom2) = pot_col(VDW_POT,atom2) + 0.5d0*U*sw
487   #else
488 <       pot = pot + 4.0*eps*R126*sw
488 >       pot = pot + U*sw
489   #endif
490      endif
491 <
492 <    vpair = vpair + 4.0*eps*R126
491 >    
492 >    vpair = vpair + U*sw
493   #ifdef IS_MPI
494      id1 = AtomRowToGlobal(atom1)
495      id2 = AtomColToGlobal(atom2)
# Line 426 | Line 500 | contains
500      
501      if (molMembershipList(id1) .ne. molMembershipList(id2)) then
502        
503 <       fpair(1) = fpair(1) + dUdx
504 <       fpair(2) = fpair(2) + dUdy
505 <       fpair(3) = fpair(3) + dUdz
503 >       fpair(1) = fpair(1) + fx
504 >       fpair(2) = fpair(2) + fy
505 >       fpair(3) = fpair(3) + fz
506        
507      endif
508      
509      return
510    end subroutine do_gb_pair
511 +  
512 +  subroutine destroyGBTypes()
513  
514 < end module gb_pair
514 >    GBMap%nGBtypes = 0
515 >    GBMap%currentGBtype = 0
516 >    
517 >    if (associated(GBMap%GBtypes)) then
518 >       deallocate(GBMap%GBtypes)
519 >       GBMap%GBtypes => null()
520 >    end if
521 >    
522 >    if (associated(GBMap%atidToGBtype)) then
523 >       deallocate(GBMap%atidToGBtype)
524 >       GBMap%atidToGBtype => null()
525 >    end if
526 >    
527 >    haveMixingMap = .false.
528 >    
529 >  end subroutine destroyGBTypes
530 >
531 > end module gayberne
532 >    

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