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!! Calculates Long Range forces Lennard-Jones interactions. |
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!! @author Charles F. Vardeman II |
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!! @author Matthew Meineke |
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< |
!! @version $Id: LJ.F90,v 1.11 2005-04-15 22:03:47 gezelter Exp $, $Date: 2005-04-15 22:03:47 $, $Name: not supported by cvs2svn $, $Revision: 1.11 $ |
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> |
!! @version $Id: LJ.F90,v 1.21 2006-04-17 21:49:12 gezelter Exp $, $Date: 2006-04-17 21:49:12 $, $Name: not supported by cvs2svn $, $Revision: 1.21 $ |
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module lj |
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use atype_module |
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– |
use switcheroo |
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use vector_class |
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use simulation |
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use status |
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+ |
use fForceOptions |
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+ |
use interpolation |
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#ifdef IS_MPI |
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use mpiSimulation |
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#endif |
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implicit none |
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PRIVATE |
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+ |
#define __FORTRAN90 |
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+ |
#include "UseTheForce/DarkSide/fInteractionMap.h" |
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integer, parameter :: DP = selected_real_kind(15) |
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< |
type, private :: LjType |
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< |
integer :: c_ident |
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< |
integer :: atid |
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> |
logical, save :: useGeometricDistanceMixing = .false. |
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> |
logical, save :: haveMixingMap = .false. |
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> |
logical, save :: useSplines = .false. |
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> |
|
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> |
real(kind=DP), save :: defaultCutoff = 0.0_DP |
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> |
logical, save :: defaultShift = .false. |
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> |
logical, save :: haveDefaultCutoff = .false. |
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> |
|
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> |
type, private :: LJtype |
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> |
integer :: atid |
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real(kind=dp) :: sigma |
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real(kind=dp) :: epsilon |
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< |
logical :: soft_pot |
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< |
end type LjType |
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> |
logical :: isSoftCore = .false. |
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> |
end type LJtype |
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|
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< |
type(LjType), dimension(:), allocatable :: ParameterMap |
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> |
type, private :: LJList |
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> |
integer :: Nljtypes = 0 |
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> |
integer :: currentLJtype = 0 |
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> |
type(LJtype), pointer :: LJtypes(:) => null() |
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> |
integer, pointer :: atidToLJtype(:) => null() |
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> |
end type LJList |
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< |
logical, save :: haveMixingMap = .false. |
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> |
type(LJList), save :: LJMap |
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type :: MixParameters |
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real(kind=DP) :: sigma |
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real(kind=DP) :: epsilon |
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< |
real(kind=dp) :: sigma6 |
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< |
real(kind=dp) :: tp6 |
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< |
real(kind=dp) :: tp12 |
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< |
real(kind=dp) :: delta |
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< |
logical :: soft_pot |
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> |
real(kind=dp) :: sigmai |
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> |
real(kind=dp) :: rCut |
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> |
logical :: rCutWasSet = .false. |
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> |
logical :: shiftedPot |
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> |
logical :: isSoftCore = .false. |
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end type MixParameters |
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type(MixParameters), dimension(:,:), allocatable :: MixingMap |
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real(kind=DP), save :: LJ_rcut |
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< |
logical, save :: have_rcut = .false. |
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< |
logical, save :: LJ_do_shift = .false. |
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< |
logical, save :: useGeometricDistanceMixing = .false. |
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> |
type(cubicSpline), save :: vLJspline |
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> |
type(cubicSpline), save :: vLJpspline |
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> |
type(cubicSpline), save :: vSoftSpline |
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> |
type(cubicSpline), save :: vSoftpSpline |
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< |
!! Public methods and data |
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|
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< |
public :: setCutoffLJ |
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public :: useGeometricMixing |
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public :: do_lj_pair |
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< |
public :: newLJtype |
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> |
public :: newLJtype |
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> |
public :: setLJDefaultCutoff |
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public :: getSigma |
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public :: getEpsilon |
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< |
public :: destroyLJTypes |
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> |
public :: do_lj_pair |
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> |
public :: destroyLJtypes |
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> |
public :: setLJsplineRmax |
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contains |
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< |
subroutine newLJtype(c_ident, sigma, epsilon, soft_pot, status) |
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> |
subroutine newLJtype(c_ident, sigma, epsilon, isSoftCore, status) |
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integer,intent(in) :: c_ident |
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real(kind=dp),intent(in) :: sigma |
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real(kind=dp),intent(in) :: epsilon |
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< |
integer, intent(in) :: soft_pot |
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> |
integer, intent(in) :: isSoftCore |
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integer,intent(out) :: status |
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< |
integer :: nATypes, myATID |
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> |
integer :: nLJTypes, ntypes, myATID |
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integer, pointer :: MatchList(:) => null() |
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+ |
integer :: current |
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status = 0 |
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+ |
! check to see if this is the first time into this routine... |
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+ |
if (.not.associated(LJMap%LJtypes)) then |
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< |
myATID = getFirstMatchingElement(atypes, "c_ident", c_ident) |
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> |
call getMatchingElementList(atypes, "is_LennardJones", .true., & |
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> |
nLJTypes, MatchList) |
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> |
|
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> |
LJMap%nLJtypes = nLJTypes |
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|
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< |
if (.not.allocated(ParameterMap)) then |
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> |
allocate(LJMap%LJtypes(nLJTypes)) |
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< |
!call getMatchingElementList(atypes, "is_LennardJones", .true., & |
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< |
! nLJTypes, MatchList) |
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< |
nAtypes = getSize(atypes) |
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< |
if (nAtypes == 0) then |
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< |
status = -1 |
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< |
return |
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< |
end if |
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> |
ntypes = getSize(atypes) |
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|
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< |
if (.not. allocated(ParameterMap)) then |
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< |
allocate(ParameterMap(nAtypes)) |
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< |
endif |
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< |
|
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> |
allocate(LJMap%atidToLJtype(ntypes)) |
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end if |
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< |
if (myATID .gt. size(ParameterMap)) then |
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< |
status = -1 |
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< |
return |
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< |
endif |
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> |
LJMap%currentLJtype = LJMap%currentLJtype + 1 |
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> |
current = LJMap%currentLJtype |
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< |
! set the values for ParameterMap for this atom type: |
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< |
|
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< |
ParameterMap(myATID)%c_ident = c_ident |
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< |
ParameterMap(myATID)%atid = myATID |
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< |
ParameterMap(myATID)%epsilon = epsilon |
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< |
ParameterMap(myATID)%sigma = sigma |
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< |
if (soft_pot == 1) then |
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< |
ParameterMap(myATID)%soft_pot = .true. |
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> |
myATID = getFirstMatchingElement(atypes, "c_ident", c_ident) |
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> |
LJMap%atidToLJtype(myATID) = current |
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> |
LJMap%LJtypes(current)%atid = myATID |
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> |
LJMap%LJtypes(current)%sigma = sigma |
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> |
LJMap%LJtypes(current)%epsilon = epsilon |
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> |
if (isSoftCore .eq. 1) then |
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> |
LJMap%LJtypes(current)%isSoftCore = .true. |
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else |
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< |
ParameterMap(myATID)%soft_pot = .false. |
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> |
LJMap%LJtypes(current)%isSoftCore = .false. |
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endif |
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end subroutine newLJtype |
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+ |
subroutine setLJDefaultCutoff(thisRcut, shiftedPot) |
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+ |
real(kind=dp), intent(in) :: thisRcut |
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+ |
logical, intent(in) :: shiftedPot |
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+ |
defaultCutoff = thisRcut |
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+ |
defaultShift = shiftedPot |
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+ |
haveDefaultCutoff = .true. |
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+ |
!we only want to build LJ Mixing map and spline if LJ is being used. |
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+ |
if(LJMap%nLJTypes /= 0) then |
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+ |
call createMixingMap() |
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+ |
call setLJsplineRmax(defaultCutoff) |
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+ |
end if |
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+ |
|
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+ |
end subroutine setLJDefaultCutoff |
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+ |
|
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function getSigma(atid) result (s) |
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integer, intent(in) :: atid |
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< |
integer :: localError |
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> |
integer :: ljt1 |
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real(kind=dp) :: s |
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|
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< |
if (.not.allocated(ParameterMap)) then |
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< |
call handleError("LJ", "no ParameterMap was present before first call of getSigma!") |
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> |
if (LJMap%currentLJtype == 0) then |
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> |
call handleError("LJ", "No members in LJMap") |
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return |
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end if |
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< |
s = ParameterMap(atid)%sigma |
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> |
ljt1 = LJMap%atidToLJtype(atid) |
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> |
s = LJMap%LJtypes(ljt1)%sigma |
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> |
|
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end function getSigma |
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function getEpsilon(atid) result (e) |
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integer, intent(in) :: atid |
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< |
integer :: localError |
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> |
integer :: ljt1 |
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real(kind=dp) :: e |
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|
| 194 |
< |
if (.not.allocated(ParameterMap)) then |
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< |
call handleError("LJ", "no ParameterMap was present before first call of getEpsilon!") |
| 194 |
> |
if (LJMap%currentLJtype == 0) then |
| 195 |
> |
call handleError("LJ", "No members in LJMap") |
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return |
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end if |
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< |
e = ParameterMap(atid)%epsilon |
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> |
ljt1 = LJMap%atidToLJtype(atid) |
| 200 |
> |
e = LJMap%LJtypes(ljt1)%epsilon |
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> |
|
| 202 |
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end function getEpsilon |
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+ |
subroutine createMixingMap() |
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+ |
integer :: nLJtypes, i, j |
| 206 |
+ |
real ( kind = dp ) :: s1, s2, e1, e2 |
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+ |
real ( kind = dp ) :: rcut6, tp6, tp12 |
| 208 |
+ |
logical :: isSoftCore1, isSoftCore2, doShift |
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|
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< |
subroutine setCutoffLJ(rcut, do_shift, status) |
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< |
logical, intent(in):: do_shift |
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< |
integer :: status, myStatus |
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< |
real(kind=dp) :: rcut |
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< |
|
| 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 |
< |
|
| 198 |
< |
subroutine useGeometricMixing() |
| 199 |
< |
useGeometricDistanceMixing = .true. |
| 200 |
< |
haveMixingMap = .false. |
| 201 |
< |
return |
| 202 |
< |
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 |
| 213 |
< |
|
| 214 |
< |
status = 0 |
| 215 |
< |
|
| 216 |
< |
if (.not. allocated(ParameterMap)) then |
| 217 |
< |
call handleError("LJ", "no ParameterMap was present before call of createMixingMap!") |
| 218 |
< |
status = -1 |
| 210 |
> |
if (LJMap%currentLJtype == 0) then |
| 211 |
> |
call handleError("LJ", "No members in LJMap") |
| 212 |
|
return |
| 220 |
– |
endif |
| 221 |
– |
|
| 222 |
– |
nATIDs = size(ParameterMap) |
| 223 |
– |
|
| 224 |
– |
if (nATIDs == 0) then |
| 225 |
– |
status = -1 |
| 226 |
– |
return |
| 213 |
|
end if |
| 214 |
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|
| 215 |
+ |
nLJtypes = LJMap%nLJtypes |
| 216 |
+ |
|
| 217 |
|
if (.not. allocated(MixingMap)) then |
| 218 |
< |
allocate(MixingMap(nATIDs, nATIDs)) |
| 218 |
> |
allocate(MixingMap(nLJtypes, nLJtypes)) |
| 219 |
|
endif |
| 220 |
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|
| 221 |
< |
if (.not.have_rcut) then |
| 222 |
< |
status = -1 |
| 235 |
< |
return |
| 236 |
< |
endif |
| 221 |
> |
useGeometricDistanceMixing = usesGeometricDistanceMixing() |
| 222 |
> |
do i = 1, nLJtypes |
| 223 |
|
|
| 224 |
< |
rcut6 = LJ_rcut**6 |
| 224 |
> |
s1 = LJMap%LJtypes(i)%sigma |
| 225 |
> |
e1 = LJMap%LJtypes(i)%epsilon |
| 226 |
> |
isSoftCore1 = LJMap%LJtypes(i)%isSoftCore |
| 227 |
|
|
| 228 |
< |
! This loops through all atypes, even those that don't support LJ forces. |
| 229 |
< |
do i = 1, nATIDs |
| 230 |
< |
call getElementProperty(atypes, i, "is_LennardJones", i_is_LJ) |
| 231 |
< |
if (i_is_LJ) then |
| 232 |
< |
Epsilon_i = ParameterMap(i)%epsilon |
| 233 |
< |
Sigma_i = ParameterMap(i)%sigma |
| 228 |
> |
do j = i, nLJtypes |
| 229 |
> |
|
| 230 |
> |
s2 = LJMap%LJtypes(j)%sigma |
| 231 |
> |
e2 = LJMap%LJtypes(j)%epsilon |
| 232 |
> |
isSoftCore2 = LJMap%LJtypes(j)%isSoftCore |
| 233 |
> |
|
| 234 |
> |
MixingMap(i,j)%isSoftCore = isSoftCore1 .or. isSoftCore2 |
| 235 |
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|
| 236 |
< |
! do self mixing rule |
| 237 |
< |
MixingMap(i,i)%sigma = Sigma_i |
| 238 |
< |
MixingMap(i,i)%sigma6 = Sigma_i ** 6 |
| 239 |
< |
MixingMap(i,i)%tp6 = (MixingMap(i,i)%sigma6)/rcut6 |
| 240 |
< |
MixingMap(i,i)%tp12 = (MixingMap(i,i)%tp6) ** 2 |
| 241 |
< |
MixingMap(i,i)%epsilon = Epsilon_i |
| 242 |
< |
MixingMap(i,i)%delta = -4.0_DP * MixingMap(i,i)%epsilon * & |
| 243 |
< |
(MixingMap(i,i)%tp12 - MixingMap(i,i)%tp6) |
| 255 |
< |
MixingMap(i,i)%soft_pot = ParameterMap(i)%soft_pot |
| 236 |
> |
! only the distance parameter uses different mixing policies |
| 237 |
> |
if (useGeometricDistanceMixing) then |
| 238 |
> |
MixingMap(i,j)%sigma = dsqrt(s1 * s2) |
| 239 |
> |
else |
| 240 |
> |
MixingMap(i,j)%sigma = 0.5_dp * (s1 + s2) |
| 241 |
> |
endif |
| 242 |
> |
|
| 243 |
> |
MixingMap(i,j)%epsilon = dsqrt(e1 * e2) |
| 244 |
|
|
| 245 |
< |
do j = i + 1, nATIDs |
| 258 |
< |
call getElementProperty(atypes, j, "is_LennardJones", j_is_LJ) |
| 245 |
> |
MixingMap(i,j)%sigmai = 1.0_DP / (MixingMap(i,j)%sigma) |
| 246 |
|
|
| 247 |
< |
if (j_is_LJ) then |
| 248 |
< |
Epsilon_j = ParameterMap(j)%epsilon |
| 249 |
< |
Sigma_j = ParameterMap(j)%sigma |
| 247 |
> |
if (haveDefaultCutoff) then |
| 248 |
> |
MixingMap(i,j)%shiftedPot = defaultShift |
| 249 |
> |
else |
| 250 |
> |
MixingMap(i,j)%shiftedPot = defaultShift |
| 251 |
> |
endif |
| 252 |
|
|
| 253 |
< |
! only the distance parameter uses different mixing policies |
| 254 |
< |
if (useGeometricDistanceMixing) then |
| 255 |
< |
! only for OPLS as far as we can tell |
| 256 |
< |
MixingMap(i,j)%sigma = dsqrt(Sigma_i * Sigma_j) |
| 257 |
< |
else |
| 258 |
< |
! everyone else |
| 259 |
< |
MixingMap(i,j)%sigma = 0.5_dp * (Sigma_i + Sigma_j) |
| 260 |
< |
endif |
| 253 |
> |
if (i.ne.j) then |
| 254 |
> |
MixingMap(j,i)%sigma = MixingMap(i,j)%sigma |
| 255 |
> |
MixingMap(j,i)%epsilon = MixingMap(i,j)%epsilon |
| 256 |
> |
MixingMap(j,i)%sigmai = MixingMap(i,j)%sigmai |
| 257 |
> |
MixingMap(j,i)%rCut = MixingMap(i,j)%rCut |
| 258 |
> |
MixingMap(j,i)%rCutWasSet = MixingMap(i,j)%rCutWasSet |
| 259 |
> |
MixingMap(j,i)%shiftedPot = MixingMap(i,j)%shiftedPot |
| 260 |
> |
MixingMap(j,i)%isSoftCore = MixingMap(i,j)%isSoftCore |
| 261 |
> |
endif |
| 262 |
|
|
| 263 |
< |
! energy parameter is always geometric mean: |
| 264 |
< |
MixingMap(i,j)%epsilon = dsqrt(Epsilon_i * Epsilon_j) |
| 265 |
< |
|
| 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 |
| 293 |
< |
endif |
| 294 |
< |
end do |
| 295 |
< |
endif |
| 296 |
< |
end do |
| 297 |
< |
|
| 263 |
> |
enddo |
| 264 |
> |
enddo |
| 265 |
> |
|
| 266 |
|
haveMixingMap = .true. |
| 267 |
< |
|
| 267 |
> |
|
| 268 |
|
end subroutine createMixingMap |
| 269 |
+ |
|
| 270 |
+ |
subroutine setLJsplineRmax(largestRcut) |
| 271 |
+ |
real( kind = dp ), intent(in) :: largestRcut |
| 272 |
+ |
real( kind = dp ) :: s, bigS, smallS, rmax, rmin |
| 273 |
+ |
integer :: np, i |
| 274 |
|
|
| 275 |
< |
subroutine do_lj_pair(atom1, atom2, d, rij, r2, sw, vpair, fpair, & |
| 303 |
< |
pot, f, do_pot) |
| 275 |
> |
if (LJMap%nLJtypes .ne. 0) then |
| 276 |
|
|
| 277 |
+ |
! |
| 278 |
+ |
! find the largest and smallest values of sigma that we'll need |
| 279 |
+ |
! |
| 280 |
+ |
bigS = 0.0_DP |
| 281 |
+ |
smallS = 1.0e9 |
| 282 |
+ |
do i = 1, LJMap%nLJtypes |
| 283 |
+ |
s = LJMap%LJtypes(i)%sigma |
| 284 |
+ |
if (s .gt. bigS) bigS = s |
| 285 |
+ |
if (s .lt. smallS) smallS = s |
| 286 |
+ |
enddo |
| 287 |
+ |
|
| 288 |
+ |
! |
| 289 |
+ |
! give ourselves a 20% margin just in case |
| 290 |
+ |
! |
| 291 |
+ |
rmax = 1.2 * largestRcut / smallS |
| 292 |
+ |
! |
| 293 |
+ |
! assume atoms will never get closer than 1 angstrom |
| 294 |
+ |
! |
| 295 |
+ |
rmin = 1 / bigS |
| 296 |
+ |
! |
| 297 |
+ |
! assume 500 points is enough |
| 298 |
+ |
! |
| 299 |
+ |
np = 500 |
| 300 |
+ |
|
| 301 |
+ |
write(*,*) 'calling setupSplines with rmin = ', rmin, ' rmax = ', rmax, & |
| 302 |
+ |
' np = ', np |
| 303 |
+ |
|
| 304 |
+ |
call setupSplines(rmin, rmax, np) |
| 305 |
+ |
|
| 306 |
+ |
endif |
| 307 |
+ |
return |
| 308 |
+ |
end subroutine setLJsplineRmax |
| 309 |
+ |
|
| 310 |
+ |
subroutine do_lj_pair(atom1, atom2, d, rij, r2, rcut, sw, vpair, fpair, & |
| 311 |
+ |
pot, f, do_pot) |
| 312 |
+ |
|
| 313 |
|
integer, intent(in) :: atom1, atom2 |
| 314 |
< |
real( kind = dp ), intent(in) :: rij, r2 |
| 314 |
> |
integer :: atid1, atid2, ljt1, ljt2 |
| 315 |
> |
real( kind = dp ), intent(in) :: rij, r2, rcut |
| 316 |
|
real( kind = dp ) :: pot, sw, vpair |
| 317 |
|
real( kind = dp ), dimension(3,nLocal) :: f |
| 318 |
|
real( kind = dp ), intent(in), dimension(3) :: d |
| 322 |
|
! local Variables |
| 323 |
|
real( kind = dp ) :: drdx, drdy, drdz |
| 324 |
|
real( kind = dp ) :: fx, fy, fz |
| 325 |
+ |
real( kind = dp ) :: myPot, myPotC, myDeriv, myDerivC, ros, rcos |
| 326 |
|
real( kind = dp ) :: pot_temp, dudr |
| 327 |
< |
real( kind = dp ) :: sigma6 |
| 327 |
> |
real( kind = dp ) :: sigmai |
| 328 |
|
real( kind = dp ) :: epsilon |
| 329 |
< |
real( kind = dp ) :: r6 |
| 320 |
< |
real( kind = dp ) :: t6 |
| 321 |
< |
real( kind = dp ) :: t12 |
| 322 |
< |
real( kind = dp ) :: delta |
| 323 |
< |
logical :: soft_pot |
| 329 |
> |
logical :: isSoftCore, shiftedPot |
| 330 |
|
integer :: id1, id2, localError |
| 331 |
|
|
| 332 |
|
if (.not.haveMixingMap) then |
| 333 |
< |
localError = 0 |
| 328 |
< |
call createMixingMap(localError) |
| 329 |
< |
if ( localError .ne. 0 ) then |
| 330 |
< |
call handleError("LJ", "MixingMap creation failed!") |
| 331 |
< |
return |
| 332 |
< |
end if |
| 333 |
> |
call createMixingMap() |
| 334 |
|
endif |
| 335 |
|
|
| 336 |
|
! Look up the correct parameters in the mixing matrix |
| 337 |
|
#ifdef IS_MPI |
| 338 |
< |
sigma6 = MixingMap(atid_Row(atom1),atid_Col(atom2))%sigma6 |
| 339 |
< |
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 |
| 338 |
> |
atid1 = atid_Row(atom1) |
| 339 |
> |
atid2 = atid_Col(atom2) |
| 340 |
|
#else |
| 341 |
< |
sigma6 = MixingMap(atid(atom1),atid(atom2))%sigma6 |
| 342 |
< |
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 |
| 341 |
> |
atid1 = atid(atom1) |
| 342 |
> |
atid2 = atid(atom2) |
| 343 |
|
#endif |
| 344 |
|
|
| 345 |
< |
r6 = r2 * r2 * r2 |
| 345 |
> |
ljt1 = LJMap%atidToLJtype(atid1) |
| 346 |
> |
ljt2 = LJMap%atidToLJtype(atid2) |
| 347 |
|
|
| 348 |
< |
t6 = sigma6/ r6 |
| 349 |
< |
t12 = t6 * t6 |
| 348 |
> |
sigmai = MixingMap(ljt1,ljt2)%sigmai |
| 349 |
> |
epsilon = MixingMap(ljt1,ljt2)%epsilon |
| 350 |
> |
isSoftCore = MixingMap(ljt1,ljt2)%isSoftCore |
| 351 |
> |
shiftedPot = MixingMap(ljt1,ljt2)%shiftedPot |
| 352 |
|
|
| 353 |
< |
if (soft_pot) then |
| 354 |
< |
pot_temp = 4.0E0_DP * epsilon * t12 |
| 355 |
< |
if (LJ_do_shift) then |
| 356 |
< |
pot_temp = pot_temp + delta |
| 357 |
< |
endif |
| 353 |
> |
ros = rij * sigmai |
| 354 |
> |
myPotC = 0.0_DP |
| 355 |
|
|
| 356 |
< |
vpair = vpair + pot_temp |
| 356 |
> |
if (isSoftCore) then |
| 357 |
|
|
| 358 |
< |
dudr = sw * 24.0E0_DP * epsilon * (-2.0E0_DP)*t12 / rij |
| 358 |
> |
call getSoftFunc(ros, myPot, myDeriv) |
| 359 |
|
|
| 360 |
< |
else |
| 361 |
< |
pot_temp = 4.0E0_DP * epsilon * (t12 - t6) |
| 362 |
< |
if (LJ_do_shift) then |
| 366 |
< |
pot_temp = pot_temp + delta |
| 360 |
> |
if (shiftedPot) then |
| 361 |
> |
rcos = rcut * sigmai |
| 362 |
> |
call getSoftFunc(rcos, myPotC, myDerivC) |
| 363 |
|
endif |
| 364 |
+ |
|
| 365 |
+ |
else |
| 366 |
|
|
| 367 |
< |
vpair = vpair + pot_temp |
| 367 |
> |
call getLJfunc(ros, myPot, myDeriv) |
| 368 |
|
|
| 369 |
< |
dudr = sw * 24.0E0_DP * epsilon * (t6 - 2.0E0_DP*t12) / rij |
| 369 |
> |
if (shiftedPot) then |
| 370 |
> |
rcos = rcut * sigmai |
| 371 |
> |
call getLJfunc(rcos, myPotC, myDerivC) |
| 372 |
> |
endif |
| 373 |
> |
|
| 374 |
|
endif |
| 375 |
|
|
| 376 |
+ |
!write(*,*) rij, ros, rcos, myPot, myDeriv, myPotC |
| 377 |
+ |
|
| 378 |
+ |
pot_temp = epsilon * (myPot - myPotC) |
| 379 |
+ |
vpair = vpair + pot_temp |
| 380 |
+ |
dudr = sw * epsilon * myDeriv * sigmai |
| 381 |
+ |
|
| 382 |
|
drdx = d(1) / rij |
| 383 |
|
drdy = d(2) / rij |
| 384 |
|
drdz = d(3) / rij |
| 387 |
|
fy = dudr * drdy |
| 388 |
|
fz = dudr * drdz |
| 389 |
|
|
| 382 |
– |
|
| 390 |
|
#ifdef IS_MPI |
| 391 |
|
if (do_pot) then |
| 392 |
< |
pot_Row(atom1) = pot_Row(atom1) + sw*pot_temp*0.5 |
| 393 |
< |
pot_Col(atom2) = pot_Col(atom2) + sw*pot_temp*0.5 |
| 392 |
> |
pot_Row(VDW_POT,atom1) = pot_Row(VDW_POT,atom1) + sw*pot_temp*0.5 |
| 393 |
> |
pot_Col(VDW_POT,atom2) = pot_Col(VDW_POT,atom2) + sw*pot_temp*0.5 |
| 394 |
|
endif |
| 395 |
|
|
| 396 |
|
f_Row(1,atom1) = f_Row(1,atom1) + fx |
| 434 |
|
end subroutine do_lj_pair |
| 435 |
|
|
| 436 |
|
subroutine destroyLJTypes() |
| 437 |
< |
if(allocated(ParameterMap)) deallocate(ParameterMap) |
| 438 |
< |
if(allocated(MixingMap)) deallocate(MixingMap) |
| 437 |
> |
|
| 438 |
> |
LJMap%nLJtypes = 0 |
| 439 |
> |
LJMap%currentLJtype = 0 |
| 440 |
> |
|
| 441 |
> |
if (associated(LJMap%LJtypes)) then |
| 442 |
> |
deallocate(LJMap%LJtypes) |
| 443 |
> |
LJMap%LJtypes => null() |
| 444 |
> |
end if |
| 445 |
> |
|
| 446 |
> |
if (associated(LJMap%atidToLJtype)) then |
| 447 |
> |
deallocate(LJMap%atidToLJtype) |
| 448 |
> |
LJMap%atidToLJtype => null() |
| 449 |
> |
end if |
| 450 |
> |
|
| 451 |
|
haveMixingMap = .false. |
| 452 |
+ |
|
| 453 |
+ |
call deleteSpline(vLJspline) |
| 454 |
+ |
call deleteSpline(vLJpspline) |
| 455 |
+ |
call deleteSpline(vSoftSpline) |
| 456 |
+ |
call deleteSpline(vSoftpSpline) |
| 457 |
+ |
|
| 458 |
|
end subroutine destroyLJTypes |
| 459 |
|
|
| 460 |
+ |
subroutine getLJfunc(r, myPot, myDeriv) |
| 461 |
|
|
| 462 |
+ |
real(kind=dp), intent(in) :: r |
| 463 |
+ |
real(kind=dp), intent(inout) :: myPot, myDeriv |
| 464 |
+ |
real(kind=dp) :: ri, ri2, ri6, ri7, ri12, ri13 |
| 465 |
+ |
real(kind=dp) :: a, b, c, d, dx |
| 466 |
+ |
integer :: j |
| 467 |
+ |
|
| 468 |
+ |
if (useSplines) then |
| 469 |
+ |
j = MAX(1, MIN(vLJspline%np, idint((r-vLJspline%x(1)) * vLJspline%dx_i) + 1)) |
| 470 |
+ |
|
| 471 |
+ |
dx = r - vLJspline%x(j) |
| 472 |
+ |
|
| 473 |
+ |
a = vLJspline%c(1,j) |
| 474 |
+ |
b = vLJspline%c(2,j) |
| 475 |
+ |
c = vLJspline%c(3,j) |
| 476 |
+ |
d = vLJspline%c(4,j) |
| 477 |
+ |
|
| 478 |
+ |
myPot = c + dx * d |
| 479 |
+ |
myPot = b + dx * myPot |
| 480 |
+ |
myPot = a + dx * myPot |
| 481 |
+ |
|
| 482 |
+ |
a = vLJpspline%c(1,j) |
| 483 |
+ |
b = vLJpspline%c(2,j) |
| 484 |
+ |
c = vLJpspline%c(3,j) |
| 485 |
+ |
d = vLJpspline%c(4,j) |
| 486 |
+ |
|
| 487 |
+ |
myDeriv = c + dx * d |
| 488 |
+ |
myDeriv = b + dx * myDeriv |
| 489 |
+ |
myDeriv = a + dx * myDeriv |
| 490 |
+ |
|
| 491 |
+ |
else |
| 492 |
+ |
ri = 1.0_DP / r |
| 493 |
+ |
ri2 = ri*ri |
| 494 |
+ |
ri6 = ri2*ri2*ri2 |
| 495 |
+ |
ri7 = ri6*ri |
| 496 |
+ |
ri12 = ri6*ri6 |
| 497 |
+ |
ri13 = ri12*ri |
| 498 |
+ |
|
| 499 |
+ |
myPot = 4.0_DP * (ri12 - ri6) |
| 500 |
+ |
myDeriv = 24.0_DP * (ri7 - 2.0_DP * ri13) |
| 501 |
+ |
endif |
| 502 |
+ |
|
| 503 |
+ |
return |
| 504 |
+ |
end subroutine getLJfunc |
| 505 |
+ |
|
| 506 |
+ |
subroutine getSoftFunc(r, myPot, myDeriv) |
| 507 |
+ |
|
| 508 |
+ |
real(kind=dp), intent(in) :: r |
| 509 |
+ |
real(kind=dp), intent(inout) :: myPot, myDeriv |
| 510 |
+ |
real(kind=dp) :: ri, ri2, ri6, ri7 |
| 511 |
+ |
real(kind=dp) :: a, b, c, d, dx |
| 512 |
+ |
integer :: j |
| 513 |
+ |
|
| 514 |
+ |
if (useSplines) then |
| 515 |
+ |
j = MAX(1, MIN(vSoftSpline%np, idint((r-vSoftSpline%x(1)) * vSoftSpline%dx_i) + 1)) |
| 516 |
+ |
|
| 517 |
+ |
dx = r - vSoftSpline%x(j) |
| 518 |
+ |
|
| 519 |
+ |
a = vSoftSpline%c(1,j) |
| 520 |
+ |
b = vSoftSpline%c(2,j) |
| 521 |
+ |
c = vSoftSpline%c(3,j) |
| 522 |
+ |
d = vSoftSpline%c(4,j) |
| 523 |
+ |
|
| 524 |
+ |
myPot = c + dx * d |
| 525 |
+ |
myPot = b + dx * myPot |
| 526 |
+ |
myPot = a + dx * myPot |
| 527 |
+ |
|
| 528 |
+ |
a = vSoftPspline%c(1,j) |
| 529 |
+ |
b = vSoftPspline%c(2,j) |
| 530 |
+ |
c = vSoftPspline%c(3,j) |
| 531 |
+ |
d = vSoftPspline%c(4,j) |
| 532 |
+ |
|
| 533 |
+ |
myDeriv = c + dx * d |
| 534 |
+ |
myDeriv = b + dx * myDeriv |
| 535 |
+ |
myDeriv = a + dx * myDeriv |
| 536 |
+ |
|
| 537 |
+ |
else |
| 538 |
+ |
ri = 1.0_DP / r |
| 539 |
+ |
ri2 = ri*ri |
| 540 |
+ |
ri6 = ri2*ri2*ri2 |
| 541 |
+ |
ri7 = ri6*ri |
| 542 |
+ |
myPot = 4.0_DP * (ri6) |
| 543 |
+ |
myDeriv = - 24.0_DP * ri7 |
| 544 |
+ |
endif |
| 545 |
+ |
|
| 546 |
+ |
return |
| 547 |
+ |
end subroutine getSoftFunc |
| 548 |
+ |
|
| 549 |
+ |
subroutine setupSplines(rmin, rmax, np) |
| 550 |
+ |
real( kind = dp ), intent(in) :: rmin, rmax |
| 551 |
+ |
integer, intent(in) :: np |
| 552 |
+ |
real( kind = dp ) :: rvals(np), vLJ(np), vLJp(np), vSoft(np), vSoftp(np) |
| 553 |
+ |
real( kind = dp ) :: dr, r, ri, ri2, ri6, ri7, ri12, ri13 |
| 554 |
+ |
real( kind = dp ) :: vljpp1, vljppn, vsoftpp1, vsoftppn |
| 555 |
+ |
integer :: i |
| 556 |
+ |
|
| 557 |
+ |
dr = (rmax-rmin) / float(np-1) |
| 558 |
+ |
|
| 559 |
+ |
do i = 1, np |
| 560 |
+ |
r = rmin + dble(i-1)*dr |
| 561 |
+ |
ri = 1.0_DP / r |
| 562 |
+ |
ri2 = ri*ri |
| 563 |
+ |
ri6 = ri2*ri2*ri2 |
| 564 |
+ |
ri7 = ri6*ri |
| 565 |
+ |
ri12 = ri6*ri6 |
| 566 |
+ |
ri13 = ri12*ri |
| 567 |
+ |
|
| 568 |
+ |
rvals(i) = r |
| 569 |
+ |
vLJ(i) = 4.0_DP * (ri12 - ri6) |
| 570 |
+ |
vLJp(i) = 24.0_DP * (ri7 - 2.0_DP * ri13) |
| 571 |
+ |
|
| 572 |
+ |
vSoft(i) = 4.0_DP * (ri6) |
| 573 |
+ |
vSoftp(i) = - 24.0_DP * ri7 |
| 574 |
+ |
enddo |
| 575 |
+ |
|
| 576 |
+ |
vljpp1 = 624.0_DP / (rmin)**(14) - 168.0_DP / (rmin)**(8) |
| 577 |
+ |
vljppn = 624.0_DP / (rmax)**(14) - 168.0_DP / (rmax)**(8) |
| 578 |
+ |
|
| 579 |
+ |
vsoftpp1 = 168.0_DP / (rmin)**(8) |
| 580 |
+ |
vsoftppn = 168.0_DP / (rmax)**(8) |
| 581 |
+ |
|
| 582 |
+ |
call newSpline(vLJspline, rvals, vLJ, vLJp(1), vLJp(np), .true.) |
| 583 |
+ |
call newSpline(vLJpspline, rvals, vLJp, vljpp1, vljppn, .true.) |
| 584 |
+ |
call newSpline(vSoftSpline, rvals, vSoft, vSoftp(1), vSoftp(np), .true.) |
| 585 |
+ |
call newSpline(vSoftpSpline, rvals, vSoftp, vsoftpp1, vsoftppn, .true.) |
| 586 |
+ |
|
| 587 |
+ |
return |
| 588 |
+ |
end subroutine setupSplines |
| 589 |
|
end module lj |
