47 |
|
#ifdef IS_MPI |
48 |
|
use mpiSimulation |
49 |
|
#endif |
50 |
< |
|
50 |
> |
|
51 |
|
implicit none |
52 |
|
|
53 |
|
PRIVATE |
54 |
+ |
#define __FORTRAN90 |
55 |
+ |
#include "UseTheForce/DarkSide/fInteractionMap.h" |
56 |
|
|
57 |
|
logical, save :: gb_pair_initialized = .false. |
58 |
|
real(kind=dp), save :: gb_sigma |
65 |
|
public :: check_gb_pair_FF |
66 |
|
public :: set_gb_pair_params |
67 |
|
public :: do_gb_pair |
68 |
+ |
public :: getGayBerneCut |
69 |
|
|
70 |
|
contains |
71 |
|
|
79 |
|
subroutine set_gb_pair_params(sigma, l2b_ratio, eps, eps_ratio, mu, nu) |
80 |
|
real( kind = dp ), intent(in) :: sigma, l2b_ratio, eps, eps_ratio |
81 |
|
real( kind = dp ), intent(in) :: mu, nu |
82 |
< |
|
82 |
> |
|
83 |
|
gb_sigma = sigma |
84 |
|
gb_l2b_ratio = l2b_ratio |
85 |
|
gb_eps = eps |
91 |
|
return |
92 |
|
end subroutine set_gb_pair_params |
93 |
|
|
94 |
+ |
!! gay berne cutoff should be a parameter in globals, this is a temporary |
95 |
+ |
!! work around - this should be fixed when gay berne is up and running |
96 |
+ |
function getGayBerneCut(atomID) result(cutValue) |
97 |
+ |
integer, intent(in) :: atomID !! nah... we don't need to use this... |
98 |
+ |
real(kind=dp) :: cutValue |
99 |
|
|
100 |
+ |
cutValue = gb_l2b_ratio*gb_sigma*2.5_dp |
101 |
+ |
end function getGayBerneCut |
102 |
+ |
|
103 |
|
subroutine do_gb_pair(atom1, atom2, d, r, r2, sw, vpair, fpair, & |
104 |
|
pot, A, f, t, do_pot) |
105 |
< |
|
105 |
> |
|
106 |
|
integer, intent(in) :: atom1, atom2 |
107 |
|
integer :: id1, id2 |
108 |
|
real (kind=dp), intent(inout) :: r, r2 |
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 |
< |
|
146 |
> |
|
147 |
|
s2 = (gb_l2b_ratio)**2 |
148 |
|
emu = (gb_eps_ratio)**(1.0d0/gb_mu) |
149 |
|
|
169 |
|
ul2(2) = A(6,atom2) |
170 |
|
ul2(3) = A(9,atom2) |
171 |
|
#endif |
172 |
< |
|
172 |
> |
|
173 |
|
dru1dx = ul1(1) |
174 |
|
dru2dx = ul2(1) |
175 |
|
dru1dy = ul1(2) |
176 |
|
dru2dy = ul2(2) |
177 |
|
dru1dz = ul1(3) |
178 |
|
dru2dz = ul2(3) |
179 |
< |
|
179 |
> |
|
180 |
|
drdx = d(1) / r |
181 |
|
drdy = d(2) / r |
182 |
|
drdz = d(3) / r |
183 |
< |
|
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 |
< |
|
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) |
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 |
< |
|
198 |
> |
|
199 |
|
dotsum = rdotu1+rdotu2 |
200 |
|
dotdiff = rdotu1-rdotu2 |
201 |
|
ds2 = dotsum*dotsum |
202 |
|
dd2 = dotdiff*dotdiff |
203 |
< |
|
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 |
< |
|
208 |
> |
|
209 |
|
line1a = dotsum/opXdot |
210 |
|
line1bx = dru1dx + dru2dx |
211 |
|
line1by = dru1dy + dru2dy |
212 |
|
line1bz = dru1dz + dru2dz |
213 |
< |
|
213 |
> |
|
214 |
|
line2a = dotdiff/omXdot |
215 |
|
line2bx = dru1dx - dru2dx |
216 |
|
line2by = dru1dy - dru2dy |
217 |
|
line2bz = dru1dz - dru2dz |
218 |
< |
|
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 |
< |
|
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 |
< |
|
229 |
> |
|
230 |
|
dgdx = term1x + line3x |
231 |
|
dgdy = term1y + line3y |
232 |
|
dgdz = term1z + line3z |
233 |
|
|
234 |
< |
term1u1x = 2.0d0*(line1a+line2a)*d(1) |
235 |
< |
term1u1y = 2.0d0*(line1a+line2a)*d(2) |
236 |
< |
term1u1z = 2.0d0*(line1a+line2a)*d(3) |
237 |
< |
term1u2x = 2.0d0*(line1a-line2a)*d(1) |
238 |
< |
term1u2y = 2.0d0*(line1a-line2a)*d(2) |
239 |
< |
term1u2z = 2.0d0*(line1a-line2a)*d(3) |
240 |
< |
|
234 |
> |
term1u1x = (line1a+line2a)*dru1dx |
235 |
> |
term1u1y = (line1a+line2a)*dru1dy |
236 |
> |
term1u1z = (line1a+line2a)*dru1dz |
237 |
> |
term1u2x = (line1a-line2a)*dru2dx |
238 |
> |
term1u2y = (line1a-line2a)*dru2dy |
239 |
> |
term1u2z = (line1a-line2a)*dru2dz |
240 |
> |
|
241 |
|
term2a = -line3a/opXdot |
242 |
|
term2b = line3b/omXdot |
243 |
< |
|
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 |
< |
|
250 |
> |
|
251 |
|
pref = -Chi*0.5d0/r2 |
252 |
|
|
253 |
|
dgdu1x = pref*(term1u1x+term2u1x) |
258 |
|
dgdu2z = pref*(term1u2z+term2u2z) |
259 |
|
|
260 |
|
g = 1.0d0 - Chi*(line3a + line3b)/(2.0d0*r2) |
261 |
< |
|
261 |
> |
|
262 |
|
BigR = (r - gb_sigma*(g**(-0.5d0)) + gb_sigma)/gb_sigma |
263 |
|
Ri = 1.0d0/BigR |
264 |
|
Ri2 = Ri*Ri |
272 |
|
dBigRdx = drdx/gb_sigma + dgdx*gfact |
273 |
|
dBigRdy = drdy/gb_sigma + dgdy*gfact |
274 |
|
dBigRdz = drdz/gb_sigma + dgdz*gfact |
275 |
+ |
|
276 |
|
dBigRdu1x = dgdu1x*gfact |
277 |
|
dBigRdu1y = dgdu1y*gfact |
278 |
|
dBigRdu1z = dgdu1z*gfact |
293 |
|
line3x = d(1)*line3 |
294 |
|
line3y = d(2)*line3 |
295 |
|
line3z = d(3)*line3 |
296 |
< |
|
296 |
> |
|
297 |
|
dgpdx = term1x + line3x |
298 |
|
dgpdy = term1y + line3y |
299 |
|
dgpdz = term1z + line3z |
300 |
< |
|
301 |
< |
term1u1x = 2.0d0*(line1a+line2a)*d(1) |
302 |
< |
term1u1y = 2.0d0*(line1a+line2a)*d(2) |
303 |
< |
term1u1z = 2.0d0*(line1a+line2a)*d(3) |
304 |
< |
term1u2x = 2.0d0*(line1a-line2a)*d(1) |
305 |
< |
term1u2y = 2.0d0*(line1a-line2a)*d(2) |
306 |
< |
term1u2z = 2.0d0*(line1a-line2a)*d(3) |
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 |
307 |
|
|
308 |
|
term2a = -line3a/opXpdot |
309 |
|
term2b = line3b/omXpdot |
310 |
< |
|
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 |
< |
|
317 |
> |
|
318 |
|
pref = -ChiPrime*0.5d0/r2 |
319 |
< |
|
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 |
< |
|
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 |
331 |
|
|
320 |
– |
! write(*,*) atom1, atom2, Chi, u1dotu2 |
332 |
|
curlyE = 1.0d0/dsqrt(1.0d0 - Chi*Chi*u1dotu2*u1dotu2) |
333 |
|
|
334 |
|
dcE = (curlyE**3)*Chi*Chi*u1dotu2 |
335 |
< |
|
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) |
342 |
< |
|
342 |
> |
|
343 |
|
enu = curlyE**gb_nu |
344 |
|
enum = enu/curlyE |
345 |
< |
|
345 |
> |
|
346 |
|
eps = gb_eps*enu*gmu |
347 |
|
|
348 |
|
yick1 = gb_eps*enu*gb_mu*gmum |
354 |
|
depsdu2x = yick1*dgpdu2x + yick2*dcEdu2x |
355 |
|
depsdu2y = yick1*dgpdu2y + yick2*dcEdu2y |
356 |
|
depsdu2z = yick1*dgpdu2z + yick2*dcEdu2z |
357 |
< |
|
357 |
> |
|
358 |
|
R126 = Ri12 - Ri6 |
359 |
|
R137 = 6.0d0*Ri7 - 12.0d0*Ri13 |
360 |
< |
|
360 |
> |
|
361 |
|
mess1 = gmu*R137 |
362 |
|
mess2 = R126*gb_mu*gmum |
363 |
< |
|
363 |
> |
|
364 |
|
dUdx = 4.0d0*gb_eps*enu*(mess1*dBigRdx + mess2*dgpdx)*sw |
365 |
|
dUdy = 4.0d0*gb_eps*enu*(mess1*dBigRdy + mess2*dgpdy)*sw |
366 |
|
dUdz = 4.0d0*gb_eps*enu*(mess1*dBigRdz + mess2*dgpdz)*sw |
367 |
< |
|
367 |
> |
|
368 |
|
dUdu1x = 4.0d0*(R126*depsdu1x + eps*R137*dBigRdu1x)*sw |
369 |
|
dUdu1y = 4.0d0*(R126*depsdu1y + eps*R137*dBigRdu1y)*sw |
370 |
|
dUdu1z = 4.0d0*(R126*depsdu1z + eps*R137*dBigRdu1z)*sw |
371 |
|
dUdu2x = 4.0d0*(R126*depsdu2x + eps*R137*dBigRdu2x)*sw |
372 |
|
dUdu2y = 4.0d0*(R126*depsdu2y + eps*R137*dBigRdu2y)*sw |
373 |
|
dUdu2z = 4.0d0*(R126*depsdu2z + eps*R137*dBigRdu2z)*sw |
374 |
< |
|
374 |
> |
|
375 |
|
#ifdef IS_MPI |
376 |
|
f_Row(1,atom1) = f_Row(1,atom1) + dUdx |
377 |
|
f_Row(2,atom1) = f_Row(2,atom1) + dUdy |
378 |
|
f_Row(3,atom1) = f_Row(3,atom1) + dUdz |
379 |
< |
|
379 |
> |
|
380 |
|
f_Col(1,atom2) = f_Col(1,atom2) - dUdx |
381 |
|
f_Col(2,atom2) = f_Col(2,atom2) - dUdy |
382 |
|
f_Col(3,atom2) = f_Col(3,atom2) - dUdz |
383 |
< |
|
383 |
> |
|
384 |
|
t_Row(1,atom1) = t_Row(1,atom1) - ul1(2)*dUdu1z + ul1(3)*dUdu1y |
385 |
|
t_Row(2,atom1) = t_Row(2,atom1) - ul1(3)*dUdu1x + ul1(1)*dUdu1z |
386 |
|
t_Row(3,atom1) = t_Row(3,atom1) - ul1(1)*dUdu1y + ul1(2)*dUdu1x |
387 |
< |
|
387 |
> |
|
388 |
|
t_Col(1,atom2) = t_Col(1,atom2) - ul2(2)*dUdu2z + ul2(3)*dUdu2y |
389 |
|
t_Col(2,atom2) = t_Col(2,atom2) - ul2(3)*dUdu2x + ul2(1)*dUdu2z |
390 |
|
t_Col(3,atom2) = t_Col(3,atom2) - ul2(1)*dUdu2y + ul2(2)*dUdu2x |
392 |
|
f(1,atom1) = f(1,atom1) + dUdx |
393 |
|
f(2,atom1) = f(2,atom1) + dUdy |
394 |
|
f(3,atom1) = f(3,atom1) + dUdz |
395 |
< |
|
395 |
> |
|
396 |
|
f(1,atom2) = f(1,atom2) - dUdx |
397 |
|
f(2,atom2) = f(2,atom2) - dUdy |
398 |
|
f(3,atom2) = f(3,atom2) - dUdz |
399 |
< |
|
399 |
> |
|
400 |
|
t(1,atom1) = t(1,atom1) - ul1(2)*dUdu1z + ul1(3)*dUdu1y |
401 |
|
t(2,atom1) = t(2,atom1) - ul1(3)*dUdu1x + ul1(1)*dUdu1z |
402 |
|
t(3,atom1) = t(3,atom1) - ul1(1)*dUdu1y + ul1(2)*dUdu1x |
403 |
< |
|
403 |
> |
|
404 |
|
t(1,atom2) = t(1,atom2) - ul2(2)*dUdu2z + ul2(3)*dUdu2y |
405 |
|
t(2,atom2) = t(2,atom2) - ul2(3)*dUdu2x + ul2(1)*dUdu2z |
406 |
|
t(3,atom2) = t(3,atom2) - ul2(1)*dUdu2y + ul2(2)*dUdu2x |
407 |
|
#endif |
408 |
< |
|
408 |
> |
|
409 |
|
if (do_pot) then |
410 |
|
#ifdef IS_MPI |
411 |
< |
pot_row(atom1) = pot_row(atom1) + 2.0d0*eps*R126*sw |
412 |
< |
pot_col(atom2) = pot_col(atom2) + 2.0d0*eps*R126*sw |
411 |
> |
pot_row(GAYBERNE_POT,atom1) = pot_row(GAYBERNE_POT,atom1) + 2.0d0*eps*R126*sw |
412 |
> |
pot_col(GAYBERNE_POT,atom2) = pot_col(GAYBERNE_POT,atom2) + 2.0d0*eps*R126*sw |
413 |
|
#else |
414 |
|
pot = pot + 4.0*eps*R126*sw |
415 |
|
#endif |
423 |
|
id1 = atom1 |
424 |
|
id2 = atom2 |
425 |
|
#endif |
426 |
< |
|
426 |
> |
|
427 |
|
if (molMembershipList(id1) .ne. molMembershipList(id2)) then |
428 |
< |
|
428 |
> |
|
429 |
|
fpair(1) = fpair(1) + dUdx |
430 |
|
fpair(2) = fpair(2) + dUdy |
431 |
|
fpair(3) = fpair(3) + dUdz |
432 |
< |
|
432 |
> |
|
433 |
|
endif |
434 |
< |
|
434 |
> |
|
435 |
|
return |
436 |
|
end subroutine do_gb_pair |
437 |
|
|