1 |
+ |
!! Calculates Long Range forces Lennard-Jones interactions. |
2 |
+ |
!! Corresponds to the force field defined in lj_FF.cpp |
3 |
+ |
!! @author Charles F. Vardeman II |
4 |
+ |
!! @author Matthew Meineke |
5 |
+ |
!! @version $Id: lj_FF.F90,v 1.13 2003-01-30 15:20:21 chuckv Exp $, $Date: 2003-01-30 15:20:21 $, $Name: not supported by cvs2svn $, $Revision: 1.13 $ |
6 |
+ |
|
7 |
+ |
|
8 |
+ |
|
9 |
|
module lj_ff |
10 |
|
use simulation |
11 |
< |
use definitions, ONLY : dp, ndim |
11 |
> |
use definitions |
12 |
> |
use generic_atypes |
13 |
|
#ifdef IS_MPI |
14 |
|
use mpiSimulation |
15 |
|
#endif |
19 |
|
!! Number of lj_atypes in lj_atype_list |
20 |
|
integer, save :: n_lj_atypes = 0 |
21 |
|
|
22 |
< |
!! Starting Size for ljMixed Array |
23 |
< |
integer, parameter :: ljMixed_blocksize = 10 |
22 |
> |
!! Global list of lj atypes in simulation |
23 |
> |
type (lj_atype), pointer :: ljListHead => null() |
24 |
> |
type (lj_atype), pointer :: ljListTail => null() |
25 |
|
|
16 |
– |
type, public :: lj_atype |
17 |
– |
private |
18 |
– |
sequence |
19 |
– |
!! Unique number for place in linked list |
20 |
– |
integer :: atype_number = 0 |
21 |
– |
!! Unique indentifier number (ie atomic no, etc) |
22 |
– |
integer :: atype_ident = 0 |
23 |
– |
!! Mass of Particle |
24 |
– |
real ( kind = dp ) :: mass = 0.0_dp |
25 |
– |
!! Lennard-Jones epslon |
26 |
– |
real ( kind = dp ) :: epslon = 0.0_dp |
27 |
– |
!! Lennard-Jones Sigma |
28 |
– |
real ( kind = dp ) :: sigma = 0.0_dp |
29 |
– |
!! Lennard-Jones Sigma Squared |
30 |
– |
real ( kind = dp ) :: sigma2 = 0.0_dp |
31 |
– |
!! Lennard-Jones Sigma to sixth |
32 |
– |
real ( kind = dp ) :: sigma6 = 0.0_dp |
33 |
– |
!! Pointer for linked list creation |
34 |
– |
type (lj_atype), pointer :: next => null() |
35 |
– |
end type lj_atype |
26 |
|
|
37 |
– |
!! Pointer type for atype ident array |
38 |
– |
type, public :: lj_atypePtr |
39 |
– |
type (lj_atype), pointer :: this => null() |
40 |
– |
end type lj_atypePtr |
41 |
– |
|
42 |
– |
!! Global list of lj atypes in simulation |
43 |
– |
type (lj_atype), pointer :: lj_atype_list => null() |
27 |
|
!! LJ mixing array |
28 |
< |
type (lj_atype), dimension(:,:), allocatable, pointer :: ljMixed =>null() |
46 |
< |
!! identity pointer list for force loop. |
47 |
< |
type (lj_atypePtr), dimension(:), allocatable :: identPtrList |
28 |
> |
type (lj_atype), dimension(:,:), pointer :: ljMixed => null() |
29 |
|
|
30 |
|
|
31 |
|
!! Neighbor list and commom arrays |
32 |
+ |
!! This should eventally get moved to a neighbor list type |
33 |
|
integer, allocatable, dimension(:) :: point |
34 |
|
integer, allocatable, dimension(:) :: list |
35 |
+ |
integer, parameter :: listMultiplier = 80 |
36 |
+ |
integer :: nListAllocs = 0 |
37 |
+ |
integer, parameter :: maxListAllocs = 5 |
38 |
|
|
39 |
< |
#ifdef IS_MPI |
55 |
< |
! Universal routines: All types of force calculations will need these arrays |
56 |
< |
! Arrays specific to a type of force calculation should be declared in that module. |
57 |
< |
real( kind = dp ), allocatable, dimension(:,:) :: qRow |
58 |
< |
real( kind = dp ), allocatable, dimension(:,:) :: qColumn |
39 |
> |
logical, save :: firstTime = .True. |
40 |
|
|
41 |
< |
real( kind = dp ), allocatable, dimension(:,:) :: fRow |
42 |
< |
real( kind = dp ), allocatable, dimension(:,:) :: fColumn |
41 |
> |
!! Atype identity pointer lists |
42 |
> |
#ifdef IS_MPI |
43 |
> |
!! Row lj_atype pointer list |
44 |
> |
type (lj_identPtrList), dimension(:), pointer :: identPtrListRow => null() |
45 |
> |
!! Column lj_atype pointer list |
46 |
> |
type (lj_identPtrList), dimension(:), pointer :: identPtrListColumn => null() |
47 |
> |
#else |
48 |
> |
type( lj_identPtrList ), dimension(:), pointer :: identPtrList => null() |
49 |
|
#endif |
50 |
|
|
51 |
|
|
52 |
+ |
!! Logical has lj force field module been initialized? |
53 |
+ |
logical, save :: isljFFinit = .false. |
54 |
|
|
55 |
|
|
67 |
– |
|
68 |
– |
|
56 |
|
!! Public methods and data |
57 |
|
public :: new_lj_atype |
58 |
|
public :: do_lj_ff |
59 |
|
public :: getLjPot |
60 |
< |
|
60 |
> |
public :: init_ljFF |
61 |
|
|
62 |
|
|
63 |
|
|
64 |
|
|
65 |
|
contains |
66 |
|
|
67 |
< |
subroutine new_lj_atype(ident,mass,epslon,sigma,status) |
67 |
> |
!! Adds a new lj_atype to the list. |
68 |
> |
subroutine new_lj_atype(ident,mass,epsilon,sigma,status) |
69 |
|
real( kind = dp ), intent(in) :: mass |
70 |
< |
real( kind = dp ), intent(in) :: epslon |
70 |
> |
real( kind = dp ), intent(in) :: epsilon |
71 |
|
real( kind = dp ), intent(in) :: sigma |
72 |
|
integer, intent(in) :: ident |
73 |
|
integer, intent(out) :: status |
74 |
|
|
75 |
< |
type (lj_atype), pointer :: this_lj_atype |
88 |
< |
type (lj_atype), pointer :: lj_atype_ptr |
89 |
< |
|
90 |
< |
type (lj_atype), allocatable, dimension(:,:), pointer :: thisMix |
91 |
< |
type (lj_atype), allocatable, dimension(:,:), pointer :: oldMix |
75 |
> |
type (lj_atype), pointer :: newLJ_atype |
76 |
|
integer :: alloc_error |
77 |
|
integer :: atype_counter = 0 |
78 |
|
integer :: alloc_size |
79 |
< |
|
79 |
> |
integer :: err_stat |
80 |
|
status = 0 |
81 |
|
|
82 |
|
|
83 |
|
|
84 |
|
! allocate a new atype |
85 |
< |
allocate(this_lj_atype,stat=alloc_error) |
85 |
> |
allocate(newLJ_atype,stat=alloc_error) |
86 |
|
if (alloc_error /= 0 ) then |
87 |
|
status = -1 |
88 |
|
return |
89 |
|
end if |
90 |
|
|
91 |
|
! assign our new lj_atype information |
92 |
< |
this_lj_atype%mass = mass |
93 |
< |
this_lj_atype%epslon = epslon |
94 |
< |
this_lj_atype%sigma = sigma |
95 |
< |
this_lj_atype%sigma2 = sigma * sigma |
96 |
< |
this_lj_atype%sigma6 = this_lj_atype%sigma2 * this_lj_atype%sigma2 & |
97 |
< |
* this_lj_atype%sigma2 |
92 |
> |
newLJ_atype%mass = mass |
93 |
> |
newLJ_atype%epsilon = epsilon |
94 |
> |
newLJ_atype%sigma = sigma |
95 |
> |
newLJ_atype%sigma2 = sigma * sigma |
96 |
> |
newLJ_atype%sigma6 = newLJ_atype%sigma2 * newLJ_atype%sigma2 & |
97 |
> |
* newLJ_atype%sigma2 |
98 |
|
! assume that this atype will be successfully added |
99 |
< |
this_lj_atype%atype_ident = ident |
100 |
< |
this_lj_atype%number = n_lj_atypes + 1 |
99 |
> |
newLJ_atype%atype_ident = ident |
100 |
> |
newLJ_atype%atype_number = n_lj_atypes + 1 |
101 |
|
|
102 |
< |
|
103 |
< |
! First time through allocate a array of size ljMixed_blocksize |
104 |
< |
if(.not. associated(ljMixed)) then |
105 |
< |
allocate(thisMix(ljMixed_blocksize,ljMixed_blocksize)) |
122 |
< |
if (alloc_error /= 0 ) then |
123 |
< |
status = -1 |
124 |
< |
return |
125 |
< |
end if |
126 |
< |
ljMixed => thisMix |
127 |
< |
! If we have outgrown ljMixed_blocksize, allocate a new matrix twice the size and |
128 |
< |
! point ljMix at the new matrix. |
129 |
< |
else if( (n_lj_atypes + 1) > size(ljMixed)) then |
130 |
< |
alloc_size = 2*size(ljMix) |
131 |
< |
allocate(thisMix(alloc_size,alloc_size)) |
132 |
< |
if (alloc_error /= 0 ) then |
133 |
< |
status = -1 |
134 |
< |
return |
135 |
< |
end if |
136 |
< |
! point oldMix at old ljMixed array |
137 |
< |
oldMix => ljMixed |
138 |
< |
! Copy oldMix into new Mixed array |
139 |
< |
thisMix = oldMix |
140 |
< |
! Point ljMixed at new array |
141 |
< |
ljMixed => thisMix |
142 |
< |
! Free old array so we don't have a memory leak |
143 |
< |
deallocate(oldMix) |
102 |
> |
call add_atype(newLJ_atype,ljListHead,ljListTail,err_stat) |
103 |
> |
if (err_stat /= 0 ) then |
104 |
> |
status = -1 |
105 |
> |
return |
106 |
|
endif |
107 |
|
|
146 |
– |
|
147 |
– |
|
148 |
– |
|
149 |
– |
|
150 |
– |
! Find bottom of atype master list |
151 |
– |
! if lj_atype_list is null then we are at the top of the list. |
152 |
– |
if (.not. associated(lj_atype_list)) then |
153 |
– |
lj_atype_ptr => this_lj_atype |
154 |
– |
atype_counter = 1 |
155 |
– |
|
156 |
– |
else ! we need to find the bottom of the list to insert new atype |
157 |
– |
lj_atype_ptr => lj_atype_list%next |
158 |
– |
atype_counter = 1 |
159 |
– |
find_end: do |
160 |
– |
if (.not. associated(lj_atype_ptr%next)) then |
161 |
– |
exit find_end |
162 |
– |
end if |
163 |
– |
! Set up mixing for new atype and current atype in list |
164 |
– |
ljMix(this_lj_atype%atype_number,lj_atype_ptr%atype_number)%sigma = & |
165 |
– |
calcLJMix("sigma",this_lj_atype%sigma, & |
166 |
– |
lj_atype_prt%sigma) |
167 |
– |
|
168 |
– |
ljMix(this_lj_atype%atype_number,lj_atype_ptr%atype_number)%sigma2 = & |
169 |
– |
ljMix(this_lj_atype%atype_number,lj_atype_ptr%atype_number)%sigma & |
170 |
– |
* ljMix(this_lj_atype%atype_number,lj_atype_ptr%atype_number)%sigma |
171 |
– |
|
172 |
– |
ljMix(this_lj_atype%atype_number,lj_atype_ptr%atype_number)%sigma6 = & |
173 |
– |
ljMix(this_lj_atype%atype_number,lj_atype_ptr%atype_number)%sigma2 & |
174 |
– |
* ljMix(this_lj_atype%atype_number,lj_atype_ptr%atype_number)%sigma2 & |
175 |
– |
* ljMix(this_lj_atype%atype_number,lj_atype_ptr%atype_number)%sigma2 |
176 |
– |
|
177 |
– |
ljMix(this_lj_atype%atype_number,lj_atype_ptr%atype_number)%epslon = & |
178 |
– |
calcLJMix("epslon",this_lj_atype%epslon, & |
179 |
– |
lj_atype_prt%epslon) |
180 |
– |
|
181 |
– |
! Advance to next pointer |
182 |
– |
lj_atype_ptr => lj_atype_ptr%next |
183 |
– |
atype_counter = atype_counter + 1 |
184 |
– |
|
185 |
– |
end do find_end |
186 |
– |
end if |
187 |
– |
|
188 |
– |
|
189 |
– |
|
190 |
– |
|
191 |
– |
! Insert new atype at end of list |
192 |
– |
lj_atype_ptr => this_lj_atype |
193 |
– |
! Increment number of atypes |
194 |
– |
|
108 |
|
n_lj_atypes = n_lj_atypes + 1 |
109 |
|
|
197 |
– |
! Set up self mixing |
110 |
|
|
199 |
– |
ljMix(n_lj_atypes,n_lj_atypes)%sigma = this_lj_atype%sigma |
200 |
– |
|
201 |
– |
ljMix(n_lj_atypes,n_lj_atypes)%sigma2 = ljMix(n_lj_atypes,n_lj_atypes)%sigma & |
202 |
– |
* ljMix(n_lj_atypes,n_lj_atypes)%sigma |
203 |
– |
|
204 |
– |
ljMix(n_lj_atypes,n_lj_atypes)%sigma6 = ljMix(n_lj_atypes,n_lj_atypes)%sigma2 & |
205 |
– |
* ljMix(n_lj_atypes,n_lj_atypes)%sigma2 & |
206 |
– |
* ljMix(n_lj_atypes,n_lj_atypes)%sigma2 |
207 |
– |
|
208 |
– |
ljMix(n_lj_atypes,n_lj_atypes)%epslon = this_lj_atype%epslon |
209 |
– |
|
210 |
– |
|
111 |
|
end subroutine new_lj_atype |
112 |
|
|
113 |
|
|
114 |
< |
subroutine init_ljFF() |
114 |
> |
subroutine init_ljFF(nComponents,ident, status) |
115 |
> |
!! Number of components in ident array |
116 |
> |
integer, intent(inout) :: nComponents |
117 |
> |
!! Array of identities nComponents long corresponding to |
118 |
> |
!! ljatype ident. |
119 |
> |
integer, dimension(nComponents),intent(inout) :: ident |
120 |
> |
!! Result status, success = 0, error = -1 |
121 |
> |
integer, intent(out) :: Status |
122 |
|
|
123 |
+ |
integer :: alloc_stat |
124 |
|
|
125 |
+ |
integer :: thisStat |
126 |
+ |
integer :: i |
127 |
|
#ifdef IS_MPI |
128 |
+ |
integer, allocatable, dimension(:) :: identRow |
129 |
+ |
integer, allocatable, dimension(:) :: identCol |
130 |
+ |
integer :: nrow |
131 |
+ |
integer :: ncol |
132 |
+ |
#endif |
133 |
+ |
status = 0 |
134 |
+ |
!! if were're not in MPI, we just update ljatypePtrList |
135 |
+ |
#ifndef IS_MPI |
136 |
+ |
call create_IdentPtrlst(ident,ljListHead,identPtrList,thisStat) |
137 |
+ |
if ( thisStat /= 0 ) then |
138 |
+ |
status = -1 |
139 |
+ |
return |
140 |
+ |
endif |
141 |
|
|
142 |
+ |
!! Allocate pointer lists |
143 |
+ |
allocate(point(nComponents),stat=alloc_stat) |
144 |
+ |
if (alloc_stat /=0) then |
145 |
+ |
status = -1 |
146 |
+ |
return |
147 |
+ |
endif |
148 |
+ |
|
149 |
+ |
allocate(list(nComponents*listMultiplier),stat=alloc_stat) |
150 |
+ |
if (alloc_stat /=0) then |
151 |
+ |
status = -1 |
152 |
+ |
return |
153 |
+ |
endif |
154 |
|
|
155 |
+ |
! if were're in MPI, we also have to worry about row and col lists |
156 |
+ |
#else |
157 |
+ |
! We can only set up forces if mpiSimulation has been setup. |
158 |
+ |
if (.not. isMPISimSet()) then |
159 |
+ |
status = -1 |
160 |
+ |
return |
161 |
+ |
endif |
162 |
+ |
nrow = getNrow() |
163 |
+ |
ncol = getNcol() |
164 |
+ |
!! Allocate temperary arrays to hold gather information |
165 |
+ |
allocate(identRow(nrow),stat=alloc_stat) |
166 |
+ |
if (alloc_stat /= 0 ) then |
167 |
+ |
status = -1 |
168 |
+ |
return |
169 |
+ |
endif |
170 |
|
|
171 |
+ |
allocate(identCol(ncol),stat=alloc_stat) |
172 |
+ |
if (alloc_stat /= 0 ) then |
173 |
+ |
status = -1 |
174 |
+ |
return |
175 |
+ |
endif |
176 |
+ |
!! Gather idents into row and column idents |
177 |
+ |
call gather(ident,identRow,plan_row) |
178 |
+ |
call gather(ident,identCol,plan_col) |
179 |
+ |
|
180 |
+ |
!! Create row and col pointer lists |
181 |
+ |
call create_IdentPtrlst(identRow,ljListTail,identPtrListRow,thisStat) |
182 |
+ |
if (thisStat /= 0 ) then |
183 |
+ |
status = -1 |
184 |
+ |
return |
185 |
+ |
endif |
186 |
+ |
|
187 |
+ |
call create_IdentPtrlst(identCol,ljListTail,identPtrListColumn,thisStat) |
188 |
+ |
if (thisStat /= 0 ) then |
189 |
+ |
status = -1 |
190 |
+ |
return |
191 |
+ |
endif |
192 |
+ |
|
193 |
+ |
!! free temporary ident arrays |
194 |
+ |
deallocate(identCol) |
195 |
+ |
deallocate(identRow) |
196 |
+ |
|
197 |
+ |
|
198 |
+ |
!! Allocate neighbor lists for mpi simulations. |
199 |
+ |
if (.not. allocated(point)) then |
200 |
+ |
allocate(point(nrow),stat=alloc_stat) |
201 |
+ |
if (alloc_stat /=0) then |
202 |
+ |
status = -1 |
203 |
+ |
return |
204 |
+ |
endif |
205 |
+ |
|
206 |
+ |
allocate(list(ncol*listMultiplier),stat=alloc_stat) |
207 |
+ |
if (alloc_stat /=0) then |
208 |
+ |
status = -1 |
209 |
+ |
return |
210 |
+ |
endif |
211 |
+ |
else |
212 |
+ |
deallocate(list) |
213 |
+ |
deallocate(point) |
214 |
+ |
allocate(point(nrow),stat=alloc_stat) |
215 |
+ |
if (alloc_stat /=0) then |
216 |
+ |
status = -1 |
217 |
+ |
return |
218 |
+ |
endif |
219 |
+ |
|
220 |
+ |
allocate(list(ncol*listMultiplier),stat=alloc_stat) |
221 |
+ |
if (alloc_stat /=0) then |
222 |
+ |
status = -1 |
223 |
+ |
return |
224 |
+ |
endif |
225 |
+ |
endif |
226 |
+ |
|
227 |
|
#endif |
228 |
+ |
|
229 |
+ |
call createMixingList(thisStat) |
230 |
+ |
if (thisStat /= 0) then |
231 |
+ |
status = -1 |
232 |
+ |
return |
233 |
+ |
endif |
234 |
+ |
isljFFinit = .true. |
235 |
|
|
236 |
|
end subroutine init_ljFF |
237 |
|
|
225 |
– |
!! Takes an ident array and creates an atype pointer list |
226 |
– |
!! based on those identities |
227 |
– |
subroutine new_ljatypePtrList(mysize,ident,PtrList,status) |
228 |
– |
integer, intent(in) :: mysize |
229 |
– |
integer, intent(in) :: ident |
230 |
– |
integer, optional :: status |
231 |
– |
type(lj_atypePtr), dimension(:) :: PtrList |
238 |
|
|
239 |
< |
integer :: thisIdent |
239 |
> |
|
240 |
> |
|
241 |
> |
|
242 |
> |
|
243 |
> |
subroutine createMixingList(status) |
244 |
> |
integer :: listSize |
245 |
> |
integer :: status |
246 |
|
integer :: i |
247 |
< |
integer :: alloc_error |
236 |
< |
type (lj_atype), pointer :: tmpPtr |
247 |
> |
integer :: j |
248 |
|
|
249 |
< |
if (present(status)) status = 0 |
249 |
> |
integer :: outerCounter = 0 |
250 |
> |
integer :: innerCounter = 0 |
251 |
> |
type (lj_atype), pointer :: tmpPtrOuter => null() |
252 |
> |
type (lj_atype), pointer :: tmpPtrInner => null() |
253 |
> |
status = 0 |
254 |
|
|
255 |
< |
! First time through, allocate list |
256 |
< |
if (.not.(allocated)) then |
257 |
< |
allocate(PtrList(mysize)) |
255 |
> |
listSize = getListLen(ljListHead) |
256 |
> |
if (listSize == 0) then |
257 |
> |
status = -1 |
258 |
> |
return |
259 |
> |
end if |
260 |
> |
|
261 |
> |
|
262 |
> |
if (.not. associated(ljMixed)) then |
263 |
> |
allocate(ljMixed(listSize,listSize)) |
264 |
|
else |
265 |
< |
! We want to creat a new ident list so free old list |
266 |
< |
deallocate(PrtList) |
267 |
< |
allocate(PtrList(mysize)) |
268 |
< |
endif |
265 |
> |
status = -1 |
266 |
> |
return |
267 |
> |
end if |
268 |
> |
|
269 |
> |
|
270 |
> |
|
271 |
> |
tmpPtrOuter => ljListHead |
272 |
> |
tmpPtrInner => tmpPtrOuter%next |
273 |
> |
do while (associated(tmpPtrOuter)) |
274 |
> |
outerCounter = outerCounter + 1 |
275 |
> |
! do self mixing rule |
276 |
> |
ljMixed(outerCounter,outerCounter)%sigma = tmpPtrOuter%sigma |
277 |
> |
|
278 |
> |
ljMixed(outerCounter,outerCounter)%sigma2 = ljMixed(outerCounter,outerCounter)%sigma & |
279 |
> |
* ljMixed(outerCounter,outerCounter)%sigma |
280 |
> |
|
281 |
> |
ljMixed(outerCounter,outerCounter)%sigma6 = ljMixed(outerCounter,outerCounter)%sigma2 & |
282 |
> |
* ljMixed(outerCounter,outerCounter)%sigma2 & |
283 |
> |
* ljMixed(outerCounter,outerCounter)%sigma2 |
284 |
> |
|
285 |
> |
ljMixed(outerCounter,outerCounter)%epsilon = tmpPtrOuter%epsilon |
286 |
> |
|
287 |
> |
innerCounter = outerCounter + 1 |
288 |
> |
do while (associated(tmpPtrInner)) |
289 |
> |
|
290 |
> |
ljMixed(outerCounter,innerCounter)%sigma = & |
291 |
> |
calcLJMix("sigma",tmpPtrOuter%sigma, & |
292 |
> |
tmpPtrInner%sigma) |
293 |
> |
|
294 |
> |
ljMixed(outerCounter,innerCounter)%sigma2 = & |
295 |
> |
ljMixed(outerCounter,innerCounter)%sigma & |
296 |
> |
* ljMixed(outerCounter,innerCounter)%sigma |
297 |
> |
|
298 |
> |
ljMixed(outerCounter,innerCounter)%sigma6 = & |
299 |
> |
ljMixed(outerCounter,innerCounter)%sigma2 & |
300 |
> |
* ljMixed(outerCounter,innerCounter)%sigma2 & |
301 |
> |
* ljMixed(outerCounter,innerCounter)%sigma2 |
302 |
> |
|
303 |
> |
ljMixed(outerCounter,innerCounter)%epsilon = & |
304 |
> |
calcLJMix("epsilon",tmpPtrOuter%epsilon, & |
305 |
> |
tmpPtrInner%epsilon) |
306 |
> |
ljMixed(innerCounter,outerCounter)%sigma = ljMixed(outerCounter,innerCounter)%sigma |
307 |
> |
ljMixed(innerCounter,outerCounter)%sigma2 = ljMixed(outerCounter,innerCounter)%sigma2 |
308 |
> |
ljMixed(innerCounter,outerCounter)%sigma6 = ljMixed(outerCounter,innerCounter)%sigma6 |
309 |
> |
ljMixed(innerCounter,outerCounter)%epsilon = ljMixed(outerCounter,innerCounter)%epsilon |
310 |
|
|
311 |
< |
! Match pointer list |
312 |
< |
do i = 1, mysize |
313 |
< |
thisIdent = ident(i) |
314 |
< |
call getLJatype(thisIdent,tmpPtr) |
315 |
< |
|
316 |
< |
if (.not. associated(tmpPtr)) then |
317 |
< |
status = -1 |
318 |
< |
return |
311 |
> |
|
312 |
> |
tmpPtrInner => tmpPtrInner%next |
313 |
> |
innerCounter = innerCounter + 1 |
314 |
> |
end do |
315 |
> |
! advance pointers |
316 |
> |
tmpPtrOuter => tmpPtrOuter%next |
317 |
> |
if (associated(tmpPtrOuter)) then |
318 |
> |
tmpPtrInner => tmpPtrOuter%next |
319 |
|
endif |
320 |
|
|
259 |
– |
PtrList(i)%this => tmpPtr |
321 |
|
end do |
322 |
|
|
323 |
< |
end subroutine new_ljatypePtrList |
323 |
> |
end subroutine createMixingList |
324 |
|
|
264 |
– |
!! Finds a lj_atype based upon numerical ident |
265 |
– |
!! returns a null pointer if error |
266 |
– |
subroutine getLJatype(ident,ljAtypePtr) |
267 |
– |
integer, intent(in) :: ident |
268 |
– |
type (lj_atype), intent(out),pointer :: ljAtypePtr => null() |
269 |
– |
|
270 |
– |
type (lj_atype), pointer :: tmplj_atype_ptr => null() |
325 |
|
|
272 |
– |
if(.not. associated(lj_atype_list)) return |
326 |
|
|
274 |
– |
! Point at head of list. |
275 |
– |
tmplj_atype_ptr => lj_atype_list |
276 |
– |
find_ident: do |
277 |
– |
if (.not.associated(tmplj_atype_ptr)) then |
278 |
– |
exit find_ident |
279 |
– |
else if( lj_atype_ptr%atype_ident == ident) |
280 |
– |
ljAtypePtr => tmplj_atype_ptr |
281 |
– |
exit find_ident |
282 |
– |
endif |
283 |
– |
tmplj_atype_ptr => tmplj_atype_ptr%next |
284 |
– |
end do find_ident |
327 |
|
|
286 |
– |
end subroutine getLJatype |
328 |
|
|
329 |
|
|
330 |
< |
! FORCE routine |
330 |
> |
|
331 |
> |
|
332 |
> |
!! FORCE routine Calculates Lennard Jones forces. |
333 |
|
!-------------------------------------------------------------> |
334 |
|
subroutine do_lj_ff(q,f,potE,do_pot) |
335 |
< |
real ( kind = dp ), dimension(ndim,) :: q |
336 |
< |
real ( kind = dp ), dimension(ndim,nLRparticles) :: f |
335 |
> |
!! Position array provided by C, dimensioned by getNlocal |
336 |
> |
real ( kind = dp ), dimension(3,getNlocal()) :: q |
337 |
> |
!! Force array provided by C, dimensioned by getNlocal |
338 |
> |
real ( kind = dp ), dimension(3,getNlocal()) :: f |
339 |
|
real ( kind = dp ) :: potE |
340 |
|
logical ( kind = 2) :: do_pot |
341 |
< |
#ifdef MPI |
342 |
< |
real( kind = DP ), dimension(3,ncol) :: efr |
341 |
> |
|
342 |
> |
type(lj_atype), pointer :: ljAtype_i |
343 |
> |
type(lj_atype), pointer :: ljAtype_j |
344 |
> |
|
345 |
> |
#ifdef IS_MPI |
346 |
> |
real( kind = DP ), dimension(3,getNcol()) :: efr |
347 |
|
real( kind = DP ) :: pot_local |
348 |
|
#else |
349 |
< |
! real( kind = DP ), dimension(3,natoms) :: efr |
349 |
> |
real( kind = DP ), dimension(3,getNlocal()) :: efr |
350 |
|
#endif |
351 |
|
|
352 |
+ |
!! Local arrays needed for MPI |
353 |
+ |
#ifdef IS_MPI |
354 |
+ |
real(kind = dp), dimension(3:getNrow()) :: qRow |
355 |
+ |
real(kind = dp), dimension(3:getNcol()) :: qCol |
356 |
+ |
|
357 |
+ |
real(kind = dp), dimension(3:getNrow()) :: fRow |
358 |
+ |
real(kind = dp), dimension(3:getNcol()) :: fCol |
359 |
+ |
real(kind = dp), dimension(3:getNlocal()) :: fMPITemp |
360 |
+ |
|
361 |
+ |
real(kind = dp), dimension(getNrow()) :: eRow |
362 |
+ |
real(kind = dp), dimension(getNcol()) :: eCol |
363 |
+ |
|
364 |
+ |
real(kind = dp), dimension(getNlocal()) :: eTemp |
365 |
+ |
#endif |
366 |
+ |
|
367 |
+ |
|
368 |
+ |
|
369 |
|
real( kind = DP ) :: pe |
370 |
< |
logical, :: update_nlist |
370 |
> |
logical :: update_nlist |
371 |
|
|
372 |
|
|
373 |
|
integer :: i, j, jbeg, jend, jnab, idim, jdim, idim2, jdim2, dim, dim2 |
376 |
|
integer :: tag_i,tag_j |
377 |
|
real( kind = DP ) :: r, pot, ftmp, dudr, d2, drdx1, kt1, kt2, kt3, ktmp |
378 |
|
real( kind = DP ) :: rxi, ryi, rzi, rxij, ryij, rzij, rijsq |
379 |
+ |
real( kind = DP ) :: rlistsq, rcutsq,rlist,rcut |
380 |
|
|
381 |
+ |
! a rig that need to be fixed. |
382 |
+ |
#ifdef IS_MPI |
383 |
+ |
logical :: newtons_thrd = .true. |
384 |
+ |
real( kind = dp ) :: pe_local |
385 |
+ |
integer :: nlocal |
386 |
+ |
#endif |
387 |
|
integer :: nrow |
388 |
|
integer :: ncol |
389 |
+ |
integer :: natoms |
390 |
|
|
391 |
|
|
392 |
|
|
393 |
+ |
|
394 |
+ |
! Make sure we are properly initialized. |
395 |
+ |
if (.not. isljFFInit) then |
396 |
+ |
write(default_error,*) "ERROR: lj_FF has not been properly initialized" |
397 |
+ |
return |
398 |
+ |
endif |
399 |
+ |
#ifdef IS_MPI |
400 |
+ |
if (.not. isMPISimSet()) then |
401 |
+ |
write(default_error,*) "ERROR: mpiSimulation has not been properly initialized" |
402 |
+ |
return |
403 |
+ |
endif |
404 |
+ |
#endif |
405 |
+ |
|
406 |
+ |
!! initialize local variables |
407 |
+ |
natoms = getNlocal() |
408 |
+ |
call getRcut(rcut,rcut2=rcutsq) |
409 |
+ |
call getRlist(rlist,rlistsq) |
410 |
+ |
|
411 |
|
#ifndef IS_MPI |
412 |
|
nrow = natoms - 1 |
413 |
|
ncol = natoms |
414 |
|
#else |
415 |
+ |
nrow = getNrow(plan_row) |
416 |
+ |
ncol = getNcol(plan_col) |
417 |
+ |
nlocal = natoms |
418 |
|
j_start = 1 |
419 |
|
#endif |
420 |
|
|
421 |
< |
call check(update_nlist) |
421 |
> |
|
422 |
> |
!! See if we need to update neighbor lists |
423 |
> |
call check(q,update_nlist) |
424 |
> |
if (firstTime) then |
425 |
> |
update_nlist = .true. |
426 |
> |
firstTime = .false. |
427 |
> |
endif |
428 |
|
|
429 |
+ |
!--------------WARNING........................... |
430 |
+ |
! Zero variables, NOTE:::: Forces are zeroed in C |
431 |
+ |
! Zeroing them here could delete previously computed |
432 |
+ |
! Forces. |
433 |
+ |
!------------------------------------------------ |
434 |
|
#ifndef IS_MPI |
435 |
< |
nloops = nloops + 1 |
436 |
< |
pot = 0.0E0_DP |
437 |
< |
f = 0.0E0_DP |
332 |
< |
e = 0.0E0_DP |
435 |
> |
! nloops = nloops + 1 |
436 |
> |
pe = 0.0E0_DP |
437 |
> |
|
438 |
|
#else |
439 |
< |
f_row = 0.0E0_DP |
440 |
< |
f_col = 0.0E0_DP |
439 |
> |
fRow = 0.0E0_DP |
440 |
> |
fCol = 0.0E0_DP |
441 |
|
|
442 |
< |
pot_local = 0.0E0_DP |
442 |
> |
pe_local = 0.0E0_DP |
443 |
|
|
444 |
< |
e_row = 0.0E0_DP |
445 |
< |
e_col = 0.0E0_DP |
446 |
< |
e_tmp = 0.0E0_DP |
444 |
> |
eRow = 0.0E0_DP |
445 |
> |
eCol = 0.0E0_DP |
446 |
> |
eTemp = 0.0E0_DP |
447 |
|
#endif |
448 |
|
efr = 0.0E0_DP |
449 |
|
|
450 |
|
! communicate MPI positions |
451 |
< |
#ifdef MPI |
452 |
< |
call gather(q,q_row,plan_row3) |
453 |
< |
call gather(q,q_col,plan_col3) |
451 |
> |
#ifdef IS_MPI |
452 |
> |
call gather(q,qRow,plan_row3d) |
453 |
> |
call gather(q,qCol,plan_col3d) |
454 |
|
#endif |
455 |
|
|
351 |
– |
#ifndef MPI |
456 |
|
|
353 |
– |
#endif |
354 |
– |
|
457 |
|
if (update_nlist) then |
458 |
|
|
459 |
|
! save current configuration, contruct neighbor list, |
460 |
|
! and calculate forces |
461 |
< |
call save_nlist() |
461 |
> |
call save_nlist(q) |
462 |
|
|
463 |
|
nlist = 0 |
464 |
|
|
465 |
< |
|
465 |
> |
|
466 |
|
|
467 |
|
do i = 1, nrow |
468 |
|
point(i) = nlist + 1 |
469 |
< |
#ifdef MPI |
470 |
< |
tag_i = tag_row(i) |
471 |
< |
rxi = q_row(1,i) |
472 |
< |
ryi = q_row(2,i) |
473 |
< |
rzi = q_row(3,i) |
469 |
> |
#ifdef IS_MPI |
470 |
> |
ljAtype_i => identPtrListRow(i)%this |
471 |
> |
tag_i = tagRow(i) |
472 |
> |
rxi = qRow(1,i) |
473 |
> |
ryi = qRow(2,i) |
474 |
> |
rzi = qRow(3,i) |
475 |
|
#else |
476 |
+ |
ljAtype_i => identPtrList(i)%this |
477 |
|
j_start = i + 1 |
478 |
|
rxi = q(1,i) |
479 |
|
ryi = q(2,i) |
481 |
|
#endif |
482 |
|
|
483 |
|
inner: do j = j_start, ncol |
484 |
< |
#ifdef MPI |
485 |
< |
tag_j = tag_col(j) |
484 |
> |
#ifdef IS_MPI |
485 |
> |
! Assign identity pointers and tags |
486 |
> |
ljAtype_j => identPtrListColumn(j)%this |
487 |
> |
tag_j = tagCol(j) |
488 |
|
if (newtons_thrd) then |
489 |
|
if (tag_i <= tag_j) then |
490 |
|
if (mod(tag_i + tag_j,2) == 0) cycle inner |
493 |
|
endif |
494 |
|
endif |
495 |
|
|
496 |
< |
rxij = wrap(rxi - q_col(1,j), 1) |
497 |
< |
ryij = wrap(ryi - q_col(2,j), 2) |
498 |
< |
rzij = wrap(rzi - q_col(3,j), 3) |
496 |
> |
rxij = wrap(rxi - qCol(1,j), 1) |
497 |
> |
ryij = wrap(ryi - qCol(2,j), 2) |
498 |
> |
rzij = wrap(rzi - qCol(3,j), 3) |
499 |
|
#else |
500 |
< |
|
500 |
> |
ljAtype_j => identPtrList(j)%this |
501 |
|
rxij = wrap(rxi - q(1,j), 1) |
502 |
|
ryij = wrap(ryi - q(2,j), 2) |
503 |
|
rzij = wrap(rzi - q(3,j), 3) |
505 |
|
#endif |
506 |
|
rijsq = rxij*rxij + ryij*ryij + rzij*rzij |
507 |
|
|
508 |
< |
#ifdef MPI |
509 |
< |
if (rijsq <= rlstsq .AND. & |
508 |
> |
#ifdef IS_MPI |
509 |
> |
if (rijsq <= rlistsq .AND. & |
510 |
|
tag_j /= tag_i) then |
511 |
|
#else |
512 |
< |
if (rijsq < rlstsq) then |
512 |
> |
|
513 |
> |
if (rijsq < rlistsq) then |
514 |
|
#endif |
515 |
|
|
516 |
|
nlist = nlist + 1 |
517 |
|
if (nlist > size(list)) then |
518 |
< |
call info("FORCE_LJ","error size list smaller then nlist") |
519 |
< |
write(msg,*) "nlist size(list)", nlist, size(list) |
413 |
< |
call info("FORCE_LJ",msg) |
414 |
< |
#ifdef MPI |
415 |
< |
call mpi_abort(MPI_COMM_WORLD,mpi_err) |
416 |
< |
#endif |
417 |
< |
stop |
518 |
> |
!! "Change how nlist size is done" |
519 |
> |
write(DEFAULT_ERROR,*) "ERROR: nlist > list size" |
520 |
|
endif |
521 |
|
list(nlist) = j |
522 |
|
|
523 |
< |
|
523 |
> |
|
524 |
|
if (rijsq < rcutsq) then |
525 |
|
|
526 |
|
r = dsqrt(rijsq) |
527 |
|
|
528 |
< |
call LJ_mix(r,pot,dudr,d2,i,j) |
528 |
> |
call getLJPot(r,pot,dudr,ljAtype_i,ljAtype_j) |
529 |
|
|
530 |
< |
#ifdef MPI |
531 |
< |
e_row(i) = e_row(i) + pot*0.5 |
532 |
< |
e_col(i) = e_col(i) + pot*0.5 |
530 |
> |
#ifdef IS_MPI |
531 |
> |
eRow(i) = eRow(i) + pot*0.5 |
532 |
> |
eCol(i) = eCol(i) + pot*0.5 |
533 |
|
#else |
534 |
< |
pe = pe + pot |
534 |
> |
pe = pe + pot |
535 |
|
#endif |
536 |
|
|
537 |
|
efr(1,j) = -rxij |
545 |
|
ftmp = dudr * drdx1 |
546 |
|
|
547 |
|
|
548 |
< |
#ifdef MPI |
549 |
< |
f_col(dim,j) = f_col(dim,j) - ftmp |
550 |
< |
f_row(dim,i) = f_row(dim,i) + ftmp |
548 |
> |
#ifdef IS_MPI |
549 |
> |
fCol(dim,j) = fCol(dim,j) - ftmp |
550 |
> |
fRow(dim,i) = fRow(dim,i) + ftmp |
551 |
|
#else |
552 |
|
|
553 |
|
f(dim,j) = f(dim,j) - ftmp |
560 |
|
enddo inner |
561 |
|
enddo |
562 |
|
|
563 |
< |
#ifdef MPI |
563 |
> |
#ifdef IS_MPI |
564 |
|
point(nrow + 1) = nlist + 1 |
565 |
|
#else |
566 |
|
point(natoms) = nlist + 1 |
574 |
|
JEND = POINT(i+1) - 1 |
575 |
|
! check thiat molecule i has neighbors |
576 |
|
if (jbeg .le. jend) then |
577 |
< |
#ifdef MPI |
578 |
< |
rxi = q_row(1,i) |
579 |
< |
ryi = q_row(2,i) |
580 |
< |
rzi = q_row(3,i) |
577 |
> |
#ifdef IS_MPI |
578 |
> |
ljAtype_i => identPtrListRow(i)%this |
579 |
> |
rxi = qRow(1,i) |
580 |
> |
ryi = qRow(2,i) |
581 |
> |
rzi = qRow(3,i) |
582 |
|
#else |
583 |
+ |
ljAtype_i => identPtrList(i)%this |
584 |
|
rxi = q(1,i) |
585 |
|
ryi = q(2,i) |
586 |
|
rzi = q(3,i) |
587 |
|
#endif |
588 |
|
do jnab = jbeg, jend |
589 |
|
j = list(jnab) |
590 |
< |
#ifdef MPI |
591 |
< |
rxij = wrap(rxi - q_col(1,j), 1) |
592 |
< |
ryij = wrap(ryi - q_col(2,j), 2) |
593 |
< |
rzij = wrap(rzi - q_col(3,j), 3) |
590 |
> |
#ifdef IS_MPI |
591 |
> |
ljAtype_j = identPtrListColumn(j)%this |
592 |
> |
rxij = wrap(rxi - q_col(1,j), 1) |
593 |
> |
ryij = wrap(ryi - q_col(2,j), 2) |
594 |
> |
rzij = wrap(rzi - q_col(3,j), 3) |
595 |
|
#else |
596 |
< |
rxij = wrap(rxi - q(1,j), 1) |
597 |
< |
ryij = wrap(ryi - q(2,j), 2) |
598 |
< |
rzij = wrap(rzi - q(3,j), 3) |
596 |
> |
ljAtype_j = identPtrList(j)%this |
597 |
> |
rxij = wrap(rxi - q(1,j), 1) |
598 |
> |
ryij = wrap(ryi - q(2,j), 2) |
599 |
> |
rzij = wrap(rzi - q(3,j), 3) |
600 |
|
#endif |
601 |
|
rijsq = rxij*rxij + ryij*ryij + rzij*rzij |
602 |
|
|
604 |
|
|
605 |
|
r = dsqrt(rijsq) |
606 |
|
|
607 |
< |
call LJ_mix(r,pot,dudr,d2,i,j) |
608 |
< |
#ifdef MPI |
609 |
< |
e_row(i) = e_row(i) + pot*0.5 |
610 |
< |
e_col(i) = e_col(i) + pot*0.5 |
607 |
> |
call getLJPot(r,pot,dudr,ljAtype_i,ljAtype_j) |
608 |
> |
#ifdef IS_MPI |
609 |
> |
eRow(i) = eRow(i) + pot*0.5 |
610 |
> |
eCol(i) = eCol(i) + pot*0.5 |
611 |
|
#else |
612 |
< |
if (do_pot) pe = pe + pot |
612 |
> |
pe = pe + pot |
613 |
|
#endif |
614 |
|
|
615 |
|
|
621 |
|
|
622 |
|
drdx1 = efr(dim,j) / r |
623 |
|
ftmp = dudr * drdx1 |
624 |
< |
#ifdef MPI |
625 |
< |
f_col(dim,j) = f_col(dim,j) - ftmp |
626 |
< |
f_row(dim,i) = f_row(dim,i) + ftmp |
624 |
> |
#ifdef IS_MPI |
625 |
> |
fCol(dim,j) = fCol(dim,j) - ftmp |
626 |
> |
fRow(dim,i) = fRow(dim,i) + ftmp |
627 |
|
#else |
628 |
|
f(dim,j) = f(dim,j) - ftmp |
629 |
|
f(dim,i) = f(dim,i) + ftmp |
637 |
|
|
638 |
|
|
639 |
|
|
640 |
< |
#ifdef MPI |
640 |
> |
#ifdef IS_MPI |
641 |
|
!!distribute forces |
642 |
< |
call scatter(f_row,f,plan_row3) |
642 |
> |
call scatter(fRow,f,plan_row3d) |
643 |
|
|
644 |
< |
call scatter(f_col,f_tmp,plan_col3) |
644 |
> |
call scatter(fCol,fMPITemp,plan_col3d) |
645 |
> |
|
646 |
|
do i = 1,nlocal |
647 |
< |
do dim = 1,3 |
541 |
< |
f(dim,i) = f(dim,i) + f_tmp(dim,i) |
542 |
< |
end do |
647 |
> |
f(1:3,i) = f(1:3,i) + fMPITemp(1:3,i) |
648 |
|
end do |
649 |
|
|
650 |
|
|
651 |
|
|
652 |
|
if (do_pot) then |
653 |
|
! scatter/gather pot_row into the members of my column |
654 |
< |
call scatter(e_row,e_tmp,plan_row) |
654 |
> |
call scatter(eRow,eTemp,plan_row) |
655 |
|
|
656 |
|
! scatter/gather pot_local into all other procs |
657 |
|
! add resultant to get total pot |
658 |
|
do i = 1, nlocal |
659 |
< |
pot_local = pot_local + e_tmp(i) |
659 |
> |
pe_local = pe_local + eTemp(i) |
660 |
|
enddo |
661 |
|
if (newtons_thrd) then |
662 |
< |
e_tmp = 0.0E0_DP |
663 |
< |
call scatter(e_col,e_tmp,plan_col) |
662 |
> |
eTemp = 0.0E0_DP |
663 |
> |
call scatter(eCol,eTemp,plan_col) |
664 |
|
do i = 1, nlocal |
665 |
< |
pot_local = pot_local + e_tmp(i) |
665 |
> |
pe_local = pe_local + eTemp(i) |
666 |
|
enddo |
667 |
|
endif |
668 |
|
endif |
669 |
+ |
potE = pe_local |
670 |
|
#endif |
671 |
|
|
672 |
+ |
potE = pe |
673 |
|
|
674 |
+ |
|
675 |
|
|
676 |
|
|
677 |
|
end subroutine do_lj_ff |
678 |
|
|
679 |
< |
!! Calculates the potential between two lj particles, optionally returns second |
679 |
> |
!! Calculates the potential between two lj particles based on two lj_atype pointers, optionally returns second |
680 |
|
!! derivatives. |
681 |
|
subroutine getLjPot(r,pot,dudr,atype1,atype2,d2,status) |
682 |
|
! arguments |
689 |
|
!! Second Derivative, optional, used mainly for normal mode calculations. |
690 |
|
real( kind = dp ), intent(out), optional :: d2 |
691 |
|
|
692 |
< |
type (lj_atype), intent(in) :: atype1 |
693 |
< |
type (lj_atype), intent(in) :: atype2 |
692 |
> |
type (lj_atype), pointer :: atype1 |
693 |
> |
type (lj_atype), pointer :: atype2 |
694 |
|
|
695 |
|
integer, intent(out), optional :: status |
696 |
|
|
698 |
|
real( kind = dp ) :: sigma |
699 |
|
real( kind = dp ) :: sigma2 |
700 |
|
real( kind = dp ) :: sigma6 |
701 |
< |
real( kind = dp ) :: epslon |
701 |
> |
real( kind = dp ) :: epsilon |
702 |
|
|
703 |
|
real( kind = dp ) :: rcut |
704 |
|
real( kind = dp ) :: rcut2 |
723 |
|
if (present(status)) status = 0 |
724 |
|
|
725 |
|
! Look up the correct parameters in the mixing matrix |
726 |
< |
sigma = ljMixed(atype1%atype_ident,atype2_atype_ident)%sigma |
727 |
< |
sigma2 = ljMixed(atype1%atype_ident,atype2_atype_ident)%sigma2 |
728 |
< |
sigma6 = ljMixed(atype1%atype_ident,atype2_atype_ident)%sigma6 |
729 |
< |
epslon = ljMixed(atype1%atype_ident,atype2_atype_ident)%epslon |
726 |
> |
sigma = ljMixed(atype1%atype_ident,atype2%atype_ident)%sigma |
727 |
> |
sigma2 = ljMixed(atype1%atype_ident,atype2%atype_ident)%sigma2 |
728 |
> |
sigma6 = ljMixed(atype1%atype_ident,atype2%atype_ident)%sigma6 |
729 |
> |
epsilon = ljMixed(atype1%atype_ident,atype2%atype_ident)%epsilon |
730 |
|
|
731 |
|
|
732 |
< |
|
732 |
> |
|
733 |
> |
|
734 |
|
call getRcut(rcut,rcut2=rcut2,rcut6=rcut6,status=errorStat) |
735 |
|
|
736 |
|
r2 = r * r |
747 |
|
delta = -4.0E0_DP*epsilon * (tp12 - tp6) |
748 |
|
|
749 |
|
if (r.le.rcut) then |
750 |
< |
u = 4.0E0_DP * epsilon * (t12 - t6) + delta |
750 |
> |
pot = 4.0E0_DP * epsilon * (t12 - t6) + delta |
751 |
|
dudr = 24.0E0_DP * epsilon * (t6 - 2.0E0_DP*t12) / r |
752 |
|
if(doSec) d2 = 24.0E0_DP * epsilon * (26.0E0_DP*t12 - 7.0E0_DP*t6)/r/r |
753 |
|
else |
754 |
< |
u = 0.0E0_DP |
754 |
> |
pot = 0.0E0_DP |
755 |
|
dudr = 0.0E0_DP |
756 |
|
if(doSec) d2 = 0.0E0_DP |
757 |
|
endif |
763 |
|
end subroutine getLjPot |
764 |
|
|
765 |
|
|
766 |
< |
!! Calculates the mixing for sigma or epslon based on character string |
766 |
> |
!! Calculates the mixing for sigma or epslon based on character string for initialzition of mixing array. |
767 |
|
function calcLJMix(thisParam,param1,param2,status) result(myMixParam) |
768 |
|
character(len=*) :: thisParam |
769 |
|
real(kind = dp) :: param1 |
780 |
|
|
781 |
|
case ("sigma") |
782 |
|
myMixParam = 0.5_dp * (param1 + param2) |
783 |
< |
case ("epslon") |
783 |
> |
case ("epsilon") |
784 |
|
myMixParam = sqrt(param1 * param2) |
785 |
|
case default |
786 |
|
status = -1 |