43 |
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!! Calculates Long Range forces Lennard-Jones interactions. |
44 |
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!! @author Charles F. Vardeman II |
45 |
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!! @author Matthew Meineke |
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< |
!! @version $Id: LJ.F90,v 1.10 2005-04-13 20:36:45 chuckv Exp $, $Date: 2005-04-13 20:36:45 $, $Name: not supported by cvs2svn $, $Revision: 1.10 $ |
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> |
!! @version $Id: LJ.F90,v 1.16 2005-09-21 23:45:48 chuckv Exp $, $Date: 2005-09-21 23:45:48 $, $Name: not supported by cvs2svn $, $Revision: 1.16 $ |
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module lj |
50 |
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use atype_module |
51 |
– |
use switcheroo |
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use vector_class |
52 |
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use simulation |
53 |
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use status |
58 |
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|
59 |
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implicit none |
60 |
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PRIVATE |
61 |
< |
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61 |
> |
|
62 |
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integer, parameter :: DP = selected_real_kind(15) |
63 |
< |
|
64 |
< |
type, private :: LjType |
65 |
< |
integer :: c_ident |
66 |
< |
integer :: atid |
63 |
> |
|
64 |
> |
logical, save :: useGeometricDistanceMixing = .false. |
65 |
> |
logical, save :: haveMixingMap = .false. |
66 |
> |
|
67 |
> |
real(kind=DP), save :: defaultCutoff = 0.0_DP |
68 |
> |
logical, save :: defaultShift = .false. |
69 |
> |
logical, save :: haveDefaultCutoff = .false. |
70 |
> |
|
71 |
> |
|
72 |
> |
type, private :: LJtype |
73 |
> |
integer :: atid |
74 |
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real(kind=dp) :: sigma |
75 |
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real(kind=dp) :: epsilon |
76 |
< |
logical :: soft_pot |
77 |
< |
end type LjType |
78 |
< |
|
79 |
< |
type(LjType), dimension(:), allocatable :: ParameterMap |
80 |
< |
|
81 |
< |
logical, save :: haveMixingMap = .false. |
82 |
< |
|
76 |
> |
logical :: isSoftCore = .false. |
77 |
> |
end type LJtype |
78 |
> |
|
79 |
> |
type, private :: LJList |
80 |
> |
integer :: Nljtypes = 0 |
81 |
> |
integer :: currentLJtype = 0 |
82 |
> |
type(LJtype), pointer :: LJtypes(:) => null() |
83 |
> |
integer, pointer :: atidToLJtype(:) => null() |
84 |
> |
end type LJList |
85 |
> |
|
86 |
> |
type(LJList), save :: LJMap |
87 |
> |
|
88 |
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type :: MixParameters |
89 |
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real(kind=DP) :: sigma |
90 |
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real(kind=DP) :: epsilon |
91 |
< |
real(kind=dp) :: sigma6 |
92 |
< |
real(kind=dp) :: tp6 |
93 |
< |
real(kind=dp) :: tp12 |
94 |
< |
real(kind=dp) :: delta |
95 |
< |
logical :: soft_pot |
91 |
> |
real(kind=dp) :: sigma6 |
92 |
> |
real(kind=dp) :: rCut |
93 |
> |
real(kind=dp) :: delta |
94 |
> |
logical :: rCutWasSet = .false. |
95 |
> |
logical :: shiftedPot |
96 |
> |
logical :: isSoftCore = .false. |
97 |
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end type MixParameters |
98 |
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|
98 |
> |
|
99 |
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type(MixParameters), dimension(:,:), allocatable :: MixingMap |
100 |
< |
|
101 |
< |
real(kind=DP), save :: LJ_rcut |
102 |
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logical, save :: have_rcut = .false. |
103 |
< |
logical, save :: LJ_do_shift = .false. |
104 |
< |
logical, save :: useGeometricDistanceMixing = .false. |
93 |
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|
94 |
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!! Public methods and data |
95 |
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|
96 |
< |
public :: setCutoffLJ |
97 |
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public :: useGeometricMixing |
98 |
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public :: do_lj_pair |
99 |
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public :: newLJtype |
100 |
> |
|
101 |
> |
public :: newLJtype |
102 |
> |
public :: setLJDefaultCutoff |
103 |
> |
public :: setLJUniformCutoff |
104 |
> |
public :: setLJCutoffByTypes |
105 |
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public :: getSigma |
106 |
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public :: getEpsilon |
107 |
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public :: destroyLJTypes |
108 |
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|
107 |
> |
public :: useGeometricMixing |
108 |
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public :: do_lj_pair |
109 |
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public :: destroyLJtypes |
110 |
> |
|
111 |
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contains |
112 |
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113 |
< |
subroutine newLJtype(c_ident, sigma, epsilon, soft_pot, status) |
113 |
> |
subroutine newLJtype(c_ident, sigma, epsilon, isSoftCore, status) |
114 |
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integer,intent(in) :: c_ident |
115 |
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real(kind=dp),intent(in) :: sigma |
116 |
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real(kind=dp),intent(in) :: epsilon |
117 |
< |
integer, intent(in) :: soft_pot |
117 |
> |
integer, intent(in) :: isSoftCore |
118 |
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integer,intent(out) :: status |
119 |
< |
integer :: nATypes, myATID |
119 |
> |
integer :: nLJTypes, ntypes, myATID |
120 |
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integer, pointer :: MatchList(:) => null() |
121 |
+ |
integer :: current |
122 |
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|
123 |
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status = 0 |
124 |
< |
|
125 |
< |
myATID = getFirstMatchingElement(atypes, "c_ident", c_ident) |
124 |
> |
! check to see if this is the first time into this routine... |
125 |
> |
if (.not.associated(LJMap%LJtypes)) then |
126 |
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|
127 |
< |
if (.not.allocated(ParameterMap)) then |
127 |
> |
call getMatchingElementList(atypes, "is_LennardJones", .true., & |
128 |
> |
nLJTypes, MatchList) |
129 |
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|
130 |
< |
!call getMatchingElementList(atypes, "is_LennardJones", .true., & |
131 |
< |
! nLJTypes, MatchList) |
132 |
< |
nAtypes = getSize(atypes) |
133 |
< |
if (nAtypes == 0) then |
134 |
< |
status = -1 |
135 |
< |
return |
136 |
< |
end if |
128 |
< |
|
129 |
< |
if (.not. allocated(ParameterMap)) then |
130 |
< |
allocate(ParameterMap(nAtypes)) |
131 |
< |
endif |
132 |
< |
|
130 |
> |
LJMap%nLJtypes = nLJTypes |
131 |
> |
|
132 |
> |
allocate(LJMap%LJtypes(nLJTypes)) |
133 |
> |
|
134 |
> |
ntypes = getSize(atypes) |
135 |
> |
|
136 |
> |
allocate(LJMap%atidToLJtype(ntypes)) |
137 |
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end if |
138 |
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|
139 |
< |
if (myATID .gt. size(ParameterMap)) then |
140 |
< |
status = -1 |
137 |
< |
return |
138 |
< |
endif |
139 |
< |
|
140 |
< |
! set the values for ParameterMap for this atom type: |
139 |
> |
LJMap%currentLJtype = LJMap%currentLJtype + 1 |
140 |
> |
current = LJMap%currentLJtype |
141 |
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|
142 |
< |
ParameterMap(myATID)%c_ident = c_ident |
143 |
< |
ParameterMap(myATID)%atid = myATID |
144 |
< |
ParameterMap(myATID)%epsilon = epsilon |
145 |
< |
ParameterMap(myATID)%sigma = sigma |
146 |
< |
if (soft_pot == 1) then |
147 |
< |
ParameterMap(myATID)%soft_pot = .true. |
142 |
> |
myATID = getFirstMatchingElement(atypes, "c_ident", c_ident) |
143 |
> |
LJMap%atidToLJtype(myATID) = current |
144 |
> |
LJMap%LJtypes(current)%atid = myATID |
145 |
> |
LJMap%LJtypes(current)%sigma = sigma |
146 |
> |
LJMap%LJtypes(current)%epsilon = epsilon |
147 |
> |
if (isSoftCore .eq. 1) then |
148 |
> |
LJMap%LJtypes(current)%isSoftCore = .true. |
149 |
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else |
150 |
< |
ParameterMap(myATID)%soft_pot = .false. |
150 |
> |
LJMap%LJtypes(current)%isSoftCore = .false. |
151 |
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endif |
152 |
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end subroutine newLJtype |
153 |
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|
154 |
+ |
subroutine setLJDefaultCutoff(thisRcut, shiftedPot) |
155 |
+ |
real(kind=dp), intent(in) :: thisRcut |
156 |
+ |
logical, intent(in) :: shiftedPot |
157 |
+ |
defaultCutoff = thisRcut |
158 |
+ |
defaultShift = shiftedPot |
159 |
+ |
haveDefaultCutoff = .true. |
160 |
+ |
!we only want to build LJ Mixing map if LJ is being used. |
161 |
+ |
if(LJMap%nLJTypes /= 0) then |
162 |
+ |
call createMixingMap() |
163 |
+ |
end if |
164 |
+ |
end subroutine setLJDefaultCutoff |
165 |
+ |
|
166 |
+ |
subroutine setLJUniformCutoff(thisRcut, shiftedPot) |
167 |
+ |
real(kind=dp), intent(in) :: thisRcut |
168 |
+ |
logical, intent(in) :: shiftedPot |
169 |
+ |
integer :: nLJtypes, i, j |
170 |
+ |
|
171 |
+ |
if (LJMap%currentLJtype == 0) then |
172 |
+ |
call handleError("LJ", "No members in LJMap") |
173 |
+ |
return |
174 |
+ |
end if |
175 |
+ |
|
176 |
+ |
nLJtypes = LJMap%nLJtypes |
177 |
+ |
if (.not. allocated(MixingMap)) then |
178 |
+ |
allocate(MixingMap(nLJtypes, nLJtypes)) |
179 |
+ |
endif |
180 |
+ |
|
181 |
+ |
do i = 1, nLJtypes |
182 |
+ |
do j = 1, nLJtypes |
183 |
+ |
MixingMap(i,j)%rCut = thisRcut |
184 |
+ |
MixingMap(i,j)%shiftedPot = shiftedPot |
185 |
+ |
MixingMap(i,j)%rCutWasSet = .true. |
186 |
+ |
enddo |
187 |
+ |
enddo |
188 |
+ |
call createMixingMap() |
189 |
+ |
end subroutine setLJUniformCutoff |
190 |
+ |
|
191 |
+ |
subroutine setLJCutoffByTypes(atid1, atid2, thisRcut, shiftedPot) |
192 |
+ |
integer, intent(in) :: atid1, atid2 |
193 |
+ |
real(kind=dp), intent(in) :: thisRcut |
194 |
+ |
logical, intent(in) :: shiftedPot |
195 |
+ |
integer :: nLJtypes, ljt1, ljt2 |
196 |
+ |
|
197 |
+ |
if (LJMap%currentLJtype == 0) then |
198 |
+ |
call handleError("LJ", "No members in LJMap") |
199 |
+ |
return |
200 |
+ |
end if |
201 |
+ |
|
202 |
+ |
nLJtypes = LJMap%nLJtypes |
203 |
+ |
if (.not. allocated(MixingMap)) then |
204 |
+ |
allocate(MixingMap(nLJtypes, nLJtypes)) |
205 |
+ |
endif |
206 |
+ |
|
207 |
+ |
ljt1 = LJMap%atidToLJtype(atid1) |
208 |
+ |
ljt2 = LJMap%atidToLJtype(atid2) |
209 |
+ |
|
210 |
+ |
MixingMap(ljt1,ljt2)%rCut = thisRcut |
211 |
+ |
MixingMap(ljt1,ljt2)%shiftedPot = shiftedPot |
212 |
+ |
MixingMap(ljt1,ljt2)%rCutWasSet = .true. |
213 |
+ |
MixingMap(ljt2,ljt1)%rCut = thisRcut |
214 |
+ |
MixingMap(ljt2,ljt1)%shiftedPot = shiftedPot |
215 |
+ |
MixingMap(ljt2,ljt1)%rCutWasSet = .true. |
216 |
+ |
|
217 |
+ |
call createMixingMap() |
218 |
+ |
end subroutine setLJCutoffByTypes |
219 |
+ |
|
220 |
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function getSigma(atid) result (s) |
221 |
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integer, intent(in) :: atid |
222 |
< |
integer :: localError |
222 |
> |
integer :: ljt1 |
223 |
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real(kind=dp) :: s |
224 |
< |
|
225 |
< |
if (.not.allocated(ParameterMap)) then |
226 |
< |
call handleError("LJ", "no ParameterMap was present before first call of getSigma!") |
224 |
> |
|
225 |
> |
if (LJMap%currentLJtype == 0) then |
226 |
> |
call handleError("LJ", "No members in LJMap") |
227 |
|
return |
228 |
|
end if |
229 |
< |
|
230 |
< |
s = ParameterMap(atid)%sigma |
229 |
> |
|
230 |
> |
ljt1 = LJMap%atidToLJtype(atid) |
231 |
> |
s = LJMap%LJtypes(ljt1)%sigma |
232 |
> |
|
233 |
|
end function getSigma |
234 |
|
|
235 |
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function getEpsilon(atid) result (e) |
236 |
|
integer, intent(in) :: atid |
237 |
< |
integer :: localError |
237 |
> |
integer :: ljt1 |
238 |
|
real(kind=dp) :: e |
239 |
< |
|
240 |
< |
if (.not.allocated(ParameterMap)) then |
241 |
< |
call handleError("LJ", "no ParameterMap was present before first call of getEpsilon!") |
239 |
> |
|
240 |
> |
if (LJMap%currentLJtype == 0) then |
241 |
> |
call handleError("LJ", "No members in LJMap") |
242 |
|
return |
243 |
|
end if |
175 |
– |
|
176 |
– |
e = ParameterMap(atid)%epsilon |
177 |
– |
end function getEpsilon |
244 |
|
|
245 |
+ |
ljt1 = LJMap%atidToLJtype(atid) |
246 |
+ |
e = LJMap%LJtypes(ljt1)%epsilon |
247 |
|
|
248 |
< |
subroutine setCutoffLJ(rcut, do_shift, status) |
181 |
< |
logical, intent(in):: do_shift |
182 |
< |
integer :: status, myStatus |
183 |
< |
real(kind=dp) :: rcut |
248 |
> |
end function getEpsilon |
249 |
|
|
185 |
– |
#define __FORTRAN90 |
186 |
– |
#include "UseTheForce/fSwitchingFunction.h" |
187 |
– |
|
188 |
– |
status = 0 |
189 |
– |
|
190 |
– |
LJ_rcut = rcut |
191 |
– |
LJ_do_shift = do_shift |
192 |
– |
call set_switch(LJ_SWITCH, rcut, rcut) |
193 |
– |
have_rcut = .true. |
194 |
– |
|
195 |
– |
return |
196 |
– |
end subroutine setCutoffLJ |
197 |
– |
|
250 |
|
subroutine useGeometricMixing() |
251 |
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useGeometricDistanceMixing = .true. |
252 |
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haveMixingMap = .false. |
253 |
|
return |
254 |
|
end subroutine useGeometricMixing |
203 |
– |
|
204 |
– |
subroutine createMixingMap(status) |
205 |
– |
integer :: nATIDs |
206 |
– |
integer :: status |
207 |
– |
integer :: i |
208 |
– |
integer :: j |
209 |
– |
real ( kind = dp ) :: Sigma_i, Sigma_j |
210 |
– |
real ( kind = dp ) :: Epsilon_i, Epsilon_j |
211 |
– |
real ( kind = dp ) :: rcut6 |
212 |
– |
logical :: i_is_LJ, j_is_LJ |
255 |
|
|
256 |
< |
status = 0 |
256 |
> |
subroutine createMixingMap() |
257 |
> |
integer :: nLJtypes, i, j |
258 |
> |
real ( kind = dp ) :: s1, s2, e1, e2 |
259 |
> |
real ( kind = dp ) :: rcut6, tp6, tp12 |
260 |
> |
logical :: isSoftCore1, isSoftCore2, doShift |
261 |
|
|
262 |
< |
if (.not. allocated(ParameterMap)) then |
263 |
< |
call handleError("LJ", "no ParameterMap was present before call of createMixingMap!") |
218 |
< |
status = -1 |
262 |
> |
if (LJMap%currentLJtype == 0) then |
263 |
> |
call handleError("LJ", "No members in LJMap") |
264 |
|
return |
220 |
– |
endif |
221 |
– |
|
222 |
– |
nATIDs = size(ParameterMap) |
223 |
– |
|
224 |
– |
if (nATIDs == 0) then |
225 |
– |
status = -1 |
226 |
– |
return |
265 |
|
end if |
266 |
|
|
267 |
+ |
nLJtypes = LJMap%nLJtypes |
268 |
+ |
|
269 |
|
if (.not. allocated(MixingMap)) then |
270 |
< |
allocate(MixingMap(nATIDs, nATIDs)) |
270 |
> |
allocate(MixingMap(nLJtypes, nLJtypes)) |
271 |
|
endif |
272 |
|
|
273 |
< |
if (.not.have_rcut) then |
274 |
< |
status = -1 |
275 |
< |
return |
276 |
< |
endif |
277 |
< |
|
278 |
< |
rcut6 = LJ_rcut**6 |
279 |
< |
|
240 |
< |
! This loops through all atypes, even those that don't support LJ forces. |
241 |
< |
do i = 1, nATIDs |
242 |
< |
call getElementProperty(atypes, i, "is_LennardJones", i_is_LJ) |
243 |
< |
if (i_is_LJ) then |
244 |
< |
Epsilon_i = ParameterMap(i)%epsilon |
245 |
< |
Sigma_i = ParameterMap(i)%sigma |
273 |
> |
do i = 1, nLJtypes |
274 |
> |
|
275 |
> |
s1 = LJMap%LJtypes(i)%sigma |
276 |
> |
e1 = LJMap%LJtypes(i)%epsilon |
277 |
> |
isSoftCore1 = LJMap%LJtypes(i)%isSoftCore |
278 |
> |
|
279 |
> |
do j = i, nLJtypes |
280 |
|
|
281 |
< |
! do self mixing rule |
282 |
< |
MixingMap(i,i)%sigma = Sigma_i |
283 |
< |
MixingMap(i,i)%sigma6 = Sigma_i ** 6 |
250 |
< |
MixingMap(i,i)%tp6 = (MixingMap(i,i)%sigma6)/rcut6 |
251 |
< |
MixingMap(i,i)%tp12 = (MixingMap(i,i)%tp6) ** 2 |
252 |
< |
MixingMap(i,i)%epsilon = Epsilon_i |
253 |
< |
MixingMap(i,i)%delta = -4.0_DP * MixingMap(i,i)%epsilon * & |
254 |
< |
(MixingMap(i,i)%tp12 - MixingMap(i,i)%tp6) |
255 |
< |
MixingMap(i,i)%soft_pot = ParameterMap(i)%soft_pot |
281 |
> |
s2 = LJMap%LJtypes(j)%sigma |
282 |
> |
e2 = LJMap%LJtypes(j)%epsilon |
283 |
> |
isSoftCore2 = LJMap%LJtypes(j)%isSoftCore |
284 |
|
|
285 |
< |
do j = i + 1, nATIDs |
286 |
< |
call getElementProperty(atypes, j, "is_LennardJones", j_is_LJ) |
285 |
> |
MixingMap(i,j)%isSoftCore = isSoftCore1 .or. isSoftCore2 |
286 |
> |
|
287 |
> |
! only the distance parameter uses different mixing policies |
288 |
> |
if (useGeometricDistanceMixing) then |
289 |
> |
MixingMap(i,j)%sigma = dsqrt(s1 * s2) |
290 |
> |
else |
291 |
> |
MixingMap(i,j)%sigma = 0.5_dp * (s1 + s2) |
292 |
> |
endif |
293 |
|
|
294 |
< |
if (j_is_LJ) then |
295 |
< |
Epsilon_j = ParameterMap(j)%epsilon |
296 |
< |
Sigma_j = ParameterMap(j)%sigma |
297 |
< |
|
298 |
< |
! only the distance parameter uses different mixing policies |
299 |
< |
if (useGeometricDistanceMixing) then |
300 |
< |
! only for OPLS as far as we can tell |
301 |
< |
MixingMap(i,j)%sigma = dsqrt(Sigma_i * Sigma_j) |
302 |
< |
else |
303 |
< |
! everyone else |
304 |
< |
MixingMap(i,j)%sigma = 0.5_dp * (Sigma_i + Sigma_j) |
305 |
< |
endif |
272 |
< |
|
273 |
< |
! energy parameter is always geometric mean: |
274 |
< |
MixingMap(i,j)%epsilon = dsqrt(Epsilon_i * Epsilon_j) |
275 |
< |
|
276 |
< |
MixingMap(i,j)%sigma6 = (MixingMap(i,j)%sigma)**6 |
277 |
< |
MixingMap(i,j)%tp6 = MixingMap(i,j)%sigma6/rcut6 |
278 |
< |
MixingMap(i,j)%tp12 = (MixingMap(i,j)%tp6) ** 2 |
279 |
< |
|
280 |
< |
MixingMap(i,j)%delta = -4.0_DP * MixingMap(i,j)%epsilon * & |
281 |
< |
(MixingMap(i,j)%tp12 - MixingMap(i,j)%tp6) |
282 |
< |
|
283 |
< |
MixingMap(i,j)%soft_pot = ParameterMap(i)%soft_pot .or. ParameterMap(j)%soft_pot |
284 |
< |
|
285 |
< |
|
286 |
< |
MixingMap(j,i)%sigma = MixingMap(i,j)%sigma |
287 |
< |
MixingMap(j,i)%sigma6 = MixingMap(i,j)%sigma6 |
288 |
< |
MixingMap(j,i)%tp6 = MixingMap(i,j)%tp6 |
289 |
< |
MixingMap(j,i)%tp12 = MixingMap(i,j)%tp12 |
290 |
< |
MixingMap(j,i)%epsilon = MixingMap(i,j)%epsilon |
291 |
< |
MixingMap(j,i)%delta = MixingMap(i,j)%delta |
292 |
< |
MixingMap(j,i)%soft_pot = MixingMap(i,j)%soft_pot |
294 |
> |
MixingMap(i,j)%epsilon = dsqrt(e1 * e2) |
295 |
> |
|
296 |
> |
MixingMap(i,j)%sigma6 = (MixingMap(i,j)%sigma)**6 |
297 |
> |
|
298 |
> |
if (MixingMap(i,j)%rCutWasSet) then |
299 |
> |
rcut6 = (MixingMap(i,j)%rcut)**6 |
300 |
> |
else |
301 |
> |
if (haveDefaultCutoff) then |
302 |
> |
rcut6 = defaultCutoff**6 |
303 |
> |
doShift = defaultShift |
304 |
> |
else |
305 |
> |
call handleError("LJ", "No specified or default cutoff value!") |
306 |
|
endif |
307 |
< |
end do |
308 |
< |
endif |
309 |
< |
end do |
307 |
> |
endif |
308 |
> |
|
309 |
> |
tp6 = MixingMap(i,j)%sigma6/rcut6 |
310 |
> |
tp12 = tp6**2 |
311 |
> |
MixingMap(i,j)%delta =-4.0_DP*MixingMap(i,j)%epsilon*(tp12 - tp6) |
312 |
> |
MixingMap(i,j)%shiftedPot = doShift |
313 |
> |
|
314 |
> |
if (i.ne.j) then |
315 |
> |
MixingMap(j,i)%sigma = MixingMap(i,j)%sigma |
316 |
> |
MixingMap(j,i)%epsilon = MixingMap(i,j)%epsilon |
317 |
> |
MixingMap(j,i)%sigma6 = MixingMap(i,j)%sigma6 |
318 |
> |
MixingMap(j,i)%rCut = MixingMap(i,j)%rCut |
319 |
> |
MixingMap(j,i)%delta = MixingMap(i,j)%delta |
320 |
> |
MixingMap(j,i)%rCutWasSet = MixingMap(i,j)%rCutWasSet |
321 |
> |
MixingMap(j,i)%shiftedPot = MixingMap(i,j)%shiftedPot |
322 |
> |
MixingMap(j,i)%isSoftCore = MixingMap(i,j)%isSoftCore |
323 |
> |
endif |
324 |
> |
|
325 |
> |
enddo |
326 |
> |
enddo |
327 |
|
|
328 |
|
haveMixingMap = .true. |
329 |
< |
|
329 |
> |
|
330 |
|
end subroutine createMixingMap |
331 |
< |
|
331 |
> |
|
332 |
|
subroutine do_lj_pair(atom1, atom2, d, rij, r2, sw, vpair, fpair, & |
333 |
|
pot, f, do_pot) |
334 |
|
|
335 |
|
integer, intent(in) :: atom1, atom2 |
336 |
+ |
integer :: atid1, atid2, ljt1, ljt2 |
337 |
|
real( kind = dp ), intent(in) :: rij, r2 |
338 |
|
real( kind = dp ) :: pot, sw, vpair |
339 |
|
real( kind = dp ), dimension(3,nLocal) :: f |
351 |
|
real( kind = dp ) :: t6 |
352 |
|
real( kind = dp ) :: t12 |
353 |
|
real( kind = dp ) :: delta |
354 |
< |
logical :: soft_pot |
354 |
> |
logical :: isSoftCore, shiftedPot |
355 |
|
integer :: id1, id2, localError |
356 |
|
|
357 |
|
if (.not.haveMixingMap) then |
358 |
< |
localError = 0 |
328 |
< |
call createMixingMap(localError) |
329 |
< |
if ( localError .ne. 0 ) then |
330 |
< |
call handleError("LJ", "MixingMap creation failed!") |
331 |
< |
return |
332 |
< |
end if |
358 |
> |
call createMixingMap() |
359 |
|
endif |
360 |
|
|
361 |
|
! Look up the correct parameters in the mixing matrix |
362 |
|
#ifdef IS_MPI |
363 |
< |
sigma6 = MixingMap(atid_Row(atom1),atid_Col(atom2))%sigma6 |
364 |
< |
epsilon = MixingMap(atid_Row(atom1),atid_Col(atom2))%epsilon |
339 |
< |
delta = MixingMap(atid_Row(atom1),atid_Col(atom2))%delta |
340 |
< |
soft_pot = MixingMap(atid_Row(atom1),atid_Col(atom2))%soft_pot |
363 |
> |
atid1 = atid_Row(atom1) |
364 |
> |
atid2 = atid_Col(atom2) |
365 |
|
#else |
366 |
< |
sigma6 = MixingMap(atid(atom1),atid(atom2))%sigma6 |
367 |
< |
epsilon = MixingMap(atid(atom1),atid(atom2))%epsilon |
344 |
< |
delta = MixingMap(atid(atom1),atid(atom2))%delta |
345 |
< |
soft_pot = MixingMap(atid(atom1),atid(atom2))%soft_pot |
366 |
> |
atid1 = atid(atom1) |
367 |
> |
atid2 = atid(atom2) |
368 |
|
#endif |
369 |
|
|
370 |
+ |
ljt1 = LJMap%atidToLJtype(atid1) |
371 |
+ |
ljt2 = LJMap%atidToLJtype(atid2) |
372 |
+ |
|
373 |
+ |
sigma6 = MixingMap(ljt1,ljt2)%sigma6 |
374 |
+ |
epsilon = MixingMap(ljt1,ljt2)%epsilon |
375 |
+ |
delta = MixingMap(ljt1,ljt2)%delta |
376 |
+ |
isSoftCore = MixingMap(ljt1,ljt2)%isSoftCore |
377 |
+ |
shiftedPot = MixingMap(ljt1,ljt2)%shiftedPot |
378 |
+ |
|
379 |
|
r6 = r2 * r2 * r2 |
380 |
< |
|
380 |
> |
|
381 |
|
t6 = sigma6/ r6 |
382 |
|
t12 = t6 * t6 |
383 |
|
|
384 |
< |
if (soft_pot) then |
385 |
< |
pot_temp = 4.0E0_DP * epsilon * t12 |
386 |
< |
if (LJ_do_shift) then |
387 |
< |
pot_temp = pot_temp + delta |
388 |
< |
endif |
389 |
< |
|
390 |
< |
vpair = vpair + pot_temp |
391 |
< |
|
392 |
< |
dudr = sw * 24.0E0_DP * epsilon * (-2.0E0_DP)*t12 / rij |
393 |
< |
|
384 |
> |
if (isSoftCore) then |
385 |
> |
|
386 |
> |
pot_temp = 4.0E0_DP * epsilon * t6 |
387 |
> |
if (shiftedPot) then |
388 |
> |
pot_temp = pot_temp + delta |
389 |
> |
endif |
390 |
> |
|
391 |
> |
vpair = vpair + pot_temp |
392 |
> |
|
393 |
> |
dudr = -sw * 24.0E0_DP * epsilon * t6 / rij |
394 |
> |
|
395 |
|
else |
396 |
< |
pot_temp = 4.0E0_DP * epsilon * (t12 - t6) |
397 |
< |
if (LJ_do_shift) then |
398 |
< |
pot_temp = pot_temp + delta |
399 |
< |
endif |
368 |
< |
|
369 |
< |
vpair = vpair + pot_temp |
370 |
< |
|
371 |
< |
dudr = sw * 24.0E0_DP * epsilon * (t6 - 2.0E0_DP*t12) / rij |
372 |
< |
endif |
396 |
> |
pot_temp = 4.0E0_DP * epsilon * (t12 - t6) |
397 |
> |
if (shiftedPot) then |
398 |
> |
pot_temp = pot_temp + delta |
399 |
> |
endif |
400 |
|
|
401 |
+ |
vpair = vpair + pot_temp |
402 |
+ |
|
403 |
+ |
dudr = sw * 24.0E0_DP * epsilon * (t6 - 2.0E0_DP*t12) / rij |
404 |
+ |
endif |
405 |
+ |
|
406 |
|
drdx = d(1) / rij |
407 |
|
drdy = d(2) / rij |
408 |
|
drdz = d(3) / rij |
409 |
< |
|
409 |
> |
|
410 |
|
fx = dudr * drdx |
411 |
|
fy = dudr * drdy |
412 |
|
fz = dudr * drdz |
413 |
< |
|
382 |
< |
|
413 |
> |
|
414 |
|
#ifdef IS_MPI |
415 |
|
if (do_pot) then |
416 |
|
pot_Row(atom1) = pot_Row(atom1) + sw*pot_temp*0.5 |
417 |
|
pot_Col(atom2) = pot_Col(atom2) + sw*pot_temp*0.5 |
418 |
|
endif |
419 |
< |
|
419 |
> |
|
420 |
|
f_Row(1,atom1) = f_Row(1,atom1) + fx |
421 |
|
f_Row(2,atom1) = f_Row(2,atom1) + fy |
422 |
|
f_Row(3,atom1) = f_Row(3,atom1) + fz |
423 |
< |
|
423 |
> |
|
424 |
|
f_Col(1,atom2) = f_Col(1,atom2) - fx |
425 |
|
f_Col(2,atom2) = f_Col(2,atom2) - fy |
426 |
|
f_Col(3,atom2) = f_Col(3,atom2) - fz |
427 |
< |
|
427 |
> |
|
428 |
|
#else |
429 |
|
if (do_pot) pot = pot + sw*pot_temp |
430 |
|
|
431 |
|
f(1,atom1) = f(1,atom1) + fx |
432 |
|
f(2,atom1) = f(2,atom1) + fy |
433 |
|
f(3,atom1) = f(3,atom1) + fz |
434 |
< |
|
434 |
> |
|
435 |
|
f(1,atom2) = f(1,atom2) - fx |
436 |
|
f(2,atom2) = f(2,atom2) - fy |
437 |
|
f(3,atom2) = f(3,atom2) - fz |
438 |
|
#endif |
439 |
< |
|
439 |
> |
|
440 |
|
#ifdef IS_MPI |
441 |
|
id1 = AtomRowToGlobal(atom1) |
442 |
|
id2 = AtomColToGlobal(atom2) |
446 |
|
#endif |
447 |
|
|
448 |
|
if (molMembershipList(id1) .ne. molMembershipList(id2)) then |
449 |
< |
|
449 |
> |
|
450 |
|
fpair(1) = fpair(1) + fx |
451 |
|
fpair(2) = fpair(2) + fy |
452 |
|
fpair(3) = fpair(3) + fz |
454 |
|
endif |
455 |
|
|
456 |
|
return |
457 |
< |
|
457 |
> |
|
458 |
|
end subroutine do_lj_pair |
459 |
< |
|
459 |
> |
|
460 |
|
subroutine destroyLJTypes() |
461 |
< |
if(allocated(ParameterMap)) deallocate(ParameterMap) |
462 |
< |
if(allocated(MixingMap)) deallocate(MixingMap) |
461 |
> |
|
462 |
> |
LJMap%nLJtypes = 0 |
463 |
> |
LJMap%currentLJtype = 0 |
464 |
> |
|
465 |
> |
if (associated(LJMap%LJtypes)) then |
466 |
> |
deallocate(LJMap%LJtypes) |
467 |
> |
LJMap%LJtypes => null() |
468 |
> |
end if |
469 |
> |
|
470 |
> |
if (associated(LJMap%atidToLJtype)) then |
471 |
> |
deallocate(LJMap%atidToLJtype) |
472 |
> |
LJMap%atidToLJtype => null() |
473 |
> |
end if |
474 |
> |
|
475 |
|
haveMixingMap = .false. |
476 |
|
end subroutine destroyLJTypes |
477 |
|
|
435 |
– |
|
478 |
|
end module lj |