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chuckv |
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!! |
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!! Copyright (c) 2005 The University of Notre Dame. All Rights Reserved. |
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!! |
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!! The University of Notre Dame grants you ("Licensee") a |
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!! non-exclusive, royalty free, license to use, modify and |
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!! redistribute this software in source and binary code form, provided |
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!! that the following conditions are met: |
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!! |
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!! 1. Acknowledgement of the program authors must be made in any |
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!! publication of scientific results based in part on use of the |
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!! program. An acceptable form of acknowledgement is citation of |
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!! the article in which the program was described (Matthew |
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!! A. Meineke, Charles F. Vardeman II, Teng Lin, Christopher |
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!! J. Fennell and J. Daniel Gezelter, "OOPSE: An Object-Oriented |
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!! Parallel Simulation Engine for Molecular Dynamics," |
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!! J. Comput. Chem. 26, pp. 252-271 (2005)) |
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!! |
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!! 2. Redistributions of source code must retain the above copyright |
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!! notice, this list of conditions and the following disclaimer. |
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!! |
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!! 3. Redistributions in binary form must reproduce the above copyright |
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!! notice, this list of conditions and the following disclaimer in the |
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!! documentation and/or other materials provided with the |
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!! distribution. |
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!! |
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!! This software is provided "AS IS," without a warranty of any |
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!! kind. All express or implied conditions, representations and |
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!! warranties, including any implied warranty of merchantability, |
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!! fitness for a particular purpose or non-infringement, are hereby |
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!! excluded. The University of Notre Dame and its licensors shall not |
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!! be liable for any damages suffered by licensee as a result of |
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!! using, modifying or distributing the software or its |
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!! derivatives. In no event will the University of Notre Dame or its |
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!! licensors be liable for any lost revenue, profit or data, or for |
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!! direct, indirect, special, consequential, incidental or punitive |
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!! damages, however caused and regardless of the theory of liability, |
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!! arising out of the use of or inability to use software, even if the |
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!! University of Notre Dame has been advised of the possibility of |
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!! such damages. |
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!! |
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!! Impliments Sutton-Chen Metallic Potential |
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!! See A.P.SUTTON and J.CHEN,PHIL MAG LETT 61,139-146,1990 |
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module suttonchen |
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use simulation |
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use force_globals |
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use status |
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use atype_module |
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use vector_class |
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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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logical, save :: SC_FF_initialized = .false. |
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integer, save :: SC_Mixing_Policy |
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real(kind = dp), save :: SC_rcut |
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logical, save :: haveRcut = .false. |
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chuckv |
728 |
logical, save :: haveMixingMap = .false. |
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logical, save :: useGeometricDistanceMixing = .false. |
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chuckv |
702 |
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chuckv |
728 |
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chuckv |
702 |
character(len = statusMsgSize) :: errMesg |
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chuckv |
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integer :: sc_err |
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chuckv |
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character(len = 200) :: errMsg |
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character(len=*), parameter :: RoutineName = "Sutton-Chen MODULE" |
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!! Logical that determines if eam arrays should be zeroed |
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logical :: cleanme = .true. |
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logical :: nmflag = .false. |
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type, private :: SCtype |
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integer :: atid |
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chuckv |
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real(kind=dp) :: c |
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chuckv |
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real(kind=dp) :: m |
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real(kind=dp) :: n |
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real(kind=dp) :: alpha |
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real(kind=dp) :: epsilon |
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chuckv |
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real(kind=dp) :: sc_rcut |
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chuckv |
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end type SCtype |
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!! Arrays for derivatives used in force calculation |
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chuckv |
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real( kind = dp), dimension(:), allocatable :: rho |
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chuckv |
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real( kind = dp), dimension(:), allocatable :: frho |
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real( kind = dp), dimension(:), allocatable :: dfrhodrho |
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chuckv |
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chuckv |
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!! Arrays for MPI storage |
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#ifdef IS_MPI |
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real( kind = dp),save, dimension(:), allocatable :: dfrhodrho_col |
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real( kind = dp),save, dimension(:), allocatable :: dfrhodrho_row |
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real( kind = dp),save, dimension(:), allocatable :: frho_row |
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real( kind = dp),save, dimension(:), allocatable :: frho_col |
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real( kind = dp),save, dimension(:), allocatable :: rho_row |
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real( kind = dp),save, dimension(:), allocatable :: rho_col |
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real( kind = dp),save, dimension(:), allocatable :: rho_tmp |
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#endif |
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type, private :: SCTypeList |
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integer :: nSCTypes = 0 |
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integer :: currentSCtype = 0 |
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type (SCtype), pointer :: SCtypes(:) => null() |
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integer, pointer :: atidToSCtype(:) => null() |
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end type SCTypeList |
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type (SCTypeList), save :: SCList |
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chuckv |
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type :: MixParameters |
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real(kind=DP) :: alpha |
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real(kind=DP) :: epsilon |
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chuckv |
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real(kind=DP) :: m |
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real(Kind=DP) :: n |
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real(kind=DP) :: vpair_pot |
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chuckv |
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real(kind=dp) :: rCut |
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logical :: rCutWasSet = .false. |
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chuckv |
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chuckv |
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end type MixParameters |
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type(MixParameters), dimension(:,:), allocatable :: MixingMap |
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chuckv |
702 |
public :: setCutoffSC |
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public :: do_SC_pair |
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public :: newSCtype |
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public :: calc_SC_prepair_rho |
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public :: clean_SC |
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public :: destroySCtypes |
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public :: getSCCut |
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chuckv |
728 |
! public :: setSCDefaultCutoff |
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! public :: setSCUniformCutoff |
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public :: useGeometricMixing |
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chuckv |
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contains |
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chuckv |
728 |
subroutine newSCtype(c_ident,c,m,n,alpha,epsilon,status) |
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real (kind = dp ) :: c ! Density Scaling |
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real (kind = dp ) :: m ! Density Exponent |
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real (kind = dp ) :: n ! Pair Potential Exponent |
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real (kind = dp ) :: alpha ! Length Scaling |
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real (kind = dp ) :: epsilon ! Energy Scaling |
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chuckv |
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integer :: c_ident |
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integer :: status |
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chuckv |
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integer :: nAtypes,nSCTypes,myATID |
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chuckv |
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integer :: maxVals |
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integer :: alloc_stat |
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integer :: current |
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integer,pointer :: Matchlist(:) => null() |
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status = 0 |
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!! Assume that atypes has already been set and get the total number of types in atypes |
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! check to see if this is the first time into |
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chuckv |
728 |
if (.not.associated(SCList%SCTypes)) then |
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chuckv |
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call getMatchingElementList(atypes, "is_SuttonChen", .true., nSCtypes, MatchList) |
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chuckv |
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SCList%nSCtypes = nSCtypes |
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allocate(SCList%SCTypes(nSCTypes)) |
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chuckv |
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nAtypes = getSize(atypes) |
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chuckv |
728 |
allocate(SCList%atidToSCType(nAtypes)) |
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chuckv |
702 |
end if |
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chuckv |
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SCList%currentSCType = SCList%currentSCType + 1 |
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current = SCList%currentSCType |
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chuckv |
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myATID = getFirstMatchingElement(atypes, "c_ident", c_ident) |
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chuckv |
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SCList%atidToSCType(myATID) = current |
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chuckv |
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chuckv |
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SCList%SCTypes(current)%atid = c_ident |
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SCList%SCTypes(current)%alpha = alpha |
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SCList%SCTypes(current)%c = c |
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SCList%SCTypes(current)%m = m |
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SCList%SCTypes(current)%n = n |
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SCList%SCTypes(current)%epsilon = epsilon |
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chuckv |
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end subroutine newSCtype |
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chuckv |
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chuckv |
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subroutine destroySCTypes() |
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chuckv |
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if (associated(SCList%SCtypes)) then |
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deallocate(SCList%SCTypes) |
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SCList%SCTypes=>null() |
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end if |
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if (associated(SCList%atidToSCtype)) then |
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deallocate(SCList%atidToSCtype) |
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SCList%atidToSCtype=>null() |
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end if |
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chuckv |
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chuckv |
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end subroutine destroySCTypes |
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chuckv |
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chuckv |
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function getSCCut(atomID) result(cutValue) |
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chuckv |
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integer, intent(in) :: atomID |
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chuckv |
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integer :: scID |
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chuckv |
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real(kind=dp) :: cutValue |
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chuckv |
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scID = SCList%atidToSCType(atomID) |
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cutValue = SCList%SCTypes(scID)%sc_rcut |
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chuckv |
713 |
end function getSCCut |
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chuckv |
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chuckv |
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subroutine createMixingMap() |
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integer :: nSCtypes, i, j |
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real ( kind = dp ) :: e1, e2,m1,m2,alpha1,alpha2,n1,n2 |
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real ( kind = dp ) :: rcut6, tp6, tp12 |
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logical :: isSoftCore1, isSoftCore2, doShift |
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if (SCList%currentSCtype == 0) then |
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call handleError("SuttonChen", "No members in SCMap") |
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chuckv |
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return |
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end if |
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chuckv |
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nSCtypes = SCList%nSCtypes |
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chuckv |
702 |
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chuckv |
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if (.not. allocated(MixingMap)) then |
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allocate(MixingMap(nSCtypes, nSCtypes)) |
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endif |
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chuckv |
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chuckv |
713 |
do i = 1, nSCtypes |
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chuckv |
702 |
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chuckv |
713 |
e1 = SCList%SCtypes(i)%epsilon |
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m1 = SCList%SCtypes(i)%m |
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n1 = SCList%SCtypes(i)%n |
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alpha1 = SCList%SCtypes(i)%alpha |
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chuckv |
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chuckv |
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do j = i, nSCtypes |
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chuckv |
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chuckv |
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e2 = SCList%SCtypes(j)%epsilon |
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m2 = SCList%SCtypes(j)%m |
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n2 = SCList%SCtypes(j)%n |
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alpha2 = SCList%SCtypes(j)%alpha |
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chuckv |
702 |
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chuckv |
728 |
if (useGeometricDistanceMixing) then |
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MixingMap(i,j)%alpha = sqrt(alpha1 * alpha2) !SC formulation |
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else |
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MixingMap(i,j)%alpha = 0.5_dp * (alpha1 + alpha2) ! Goddard formulation |
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endif |
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MixingMap(i,j)%epsilon = sqrt(e1 * e2) |
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chuckv |
713 |
MixingMap(i,j)%m = 0.5_dp*(m1+m2) |
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MixingMap(i,j)%n = 0.5_dp*(n1+n2) |
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MixingMap(i,j)%alpha = 0.5_dp*(alpha1+alpha2) |
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MixingMap(i,j)%rcut = 2.0_dp *MixingMap(i,j)%alpha |
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chuckv |
728 |
MixingMap(i,j)%vpair_pot = MixingMap(i,j)%epsilon* & |
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(MixingMap(i,j)%alpha/MixingMap(i,j)%rcut)**MixingMap(i,j)%n |
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if (i.ne.j) then |
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MixingMap(j,i)%epsilon = MixingMap(i,j)%epsilon |
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MixingMap(j,i)%m = MixingMap(i,j)%m |
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MixingMap(j,i)%n = MixingMap(i,j)%n |
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MixingMap(j,i)%alpha = MixingMap(i,j)%alpha |
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MixingMap(j,i)%rcut = MixingMap(i,j)%rcut |
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MixingMap(j,i)%vpair_pot = MixingMap(i,j)%vpair_pot |
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endif |
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chuckv |
713 |
enddo |
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chuckv |
702 |
enddo |
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chuckv |
713 |
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haveMixingMap = .true. |
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end subroutine createMixingMap |
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chuckv |
702 |
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!! routine checks to see if array is allocated, deallocates array if allocated |
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!! and then creates the array to the required size |
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chuckv |
713 |
subroutine allocateSC(status) |
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chuckv |
702 |
integer, intent(out) :: status |
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#ifdef IS_MPI |
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integer :: nAtomsInRow |
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integer :: nAtomsInCol |
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#endif |
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integer :: alloc_stat |
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status = 0 |
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#ifdef IS_MPI |
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nAtomsInRow = getNatomsInRow(plan_atom_row) |
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nAtomsInCol = getNatomsInCol(plan_atom_col) |
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#endif |
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chuckv |
713 |
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chuckv |
702 |
if (allocated(frho)) deallocate(frho) |
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allocate(frho(nlocal),stat=alloc_stat) |
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chuckv |
713 |
if (alloc_stat /= 0) then |
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chuckv |
702 |
status = -1 |
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return |
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end if |
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chuckv |
713 |
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chuckv |
702 |
if (allocated(rho)) deallocate(rho) |
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allocate(rho(nlocal),stat=alloc_stat) |
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if (alloc_stat /= 0) then |
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status = -1 |
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return |
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end if |
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if (allocated(dfrhodrho)) deallocate(dfrhodrho) |
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allocate(dfrhodrho(nlocal),stat=alloc_stat) |
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if (alloc_stat /= 0) then |
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status = -1 |
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return |
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end if |
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#ifdef IS_MPI |
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if (allocated(rho_tmp)) deallocate(rho_tmp) |
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allocate(rho_tmp(nlocal),stat=alloc_stat) |
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if (alloc_stat /= 0) then |
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status = -1 |
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return |
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end if |
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if (allocated(frho_row)) deallocate(frho_row) |
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allocate(frho_row(nAtomsInRow),stat=alloc_stat) |
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if (alloc_stat /= 0) then |
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status = -1 |
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return |
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end if |
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if (allocated(rho_row)) deallocate(rho_row) |
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allocate(rho_row(nAtomsInRow),stat=alloc_stat) |
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if (alloc_stat /= 0) then |
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status = -1 |
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return |
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end if |
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if (allocated(dfrhodrho_row)) deallocate(dfrhodrho_row) |
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|
|
allocate(dfrhodrho_row(nAtomsInRow),stat=alloc_stat) |
| 355 |
|
|
if (alloc_stat /= 0) then |
| 356 |
|
|
status = -1 |
| 357 |
|
|
return |
| 358 |
|
|
end if |
| 359 |
|
|
|
| 360 |
|
|
|
| 361 |
|
|
! Now do column arrays |
| 362 |
|
|
|
| 363 |
|
|
if (allocated(frho_col)) deallocate(frho_col) |
| 364 |
|
|
allocate(frho_col(nAtomsInCol),stat=alloc_stat) |
| 365 |
|
|
if (alloc_stat /= 0) then |
| 366 |
|
|
status = -1 |
| 367 |
|
|
return |
| 368 |
|
|
end if |
| 369 |
|
|
if (allocated(rho_col)) deallocate(rho_col) |
| 370 |
|
|
allocate(rho_col(nAtomsInCol),stat=alloc_stat) |
| 371 |
|
|
if (alloc_stat /= 0) then |
| 372 |
|
|
status = -1 |
| 373 |
|
|
return |
| 374 |
|
|
end if |
| 375 |
|
|
if (allocated(dfrhodrho_col)) deallocate(dfrhodrho_col) |
| 376 |
|
|
allocate(dfrhodrho_col(nAtomsInCol),stat=alloc_stat) |
| 377 |
|
|
if (alloc_stat /= 0) then |
| 378 |
|
|
status = -1 |
| 379 |
|
|
return |
| 380 |
|
|
end if |
| 381 |
|
|
|
| 382 |
|
|
#endif |
| 383 |
|
|
|
| 384 |
chuckv |
713 |
end subroutine allocateSC |
| 385 |
chuckv |
702 |
|
| 386 |
|
|
!! C sets rcut to be the largest cutoff of any atype |
| 387 |
|
|
!! present in this simulation. Doesn't include all atypes |
| 388 |
|
|
!! sim knows about, just those in the simulation. |
| 389 |
chuckv |
713 |
subroutine setCutoffSC(rcut, status) |
| 390 |
chuckv |
702 |
real(kind=dp) :: rcut |
| 391 |
|
|
integer :: status |
| 392 |
|
|
status = 0 |
| 393 |
|
|
|
| 394 |
chuckv |
713 |
SC_rcut = rcut |
| 395 |
chuckv |
702 |
|
| 396 |
chuckv |
713 |
end subroutine setCutoffSC |
| 397 |
chuckv |
702 |
|
| 398 |
chuckv |
728 |
subroutine useGeometricMixing() |
| 399 |
|
|
useGeometricDistanceMixing = .true. |
| 400 |
|
|
haveMixingMap = .false. |
| 401 |
|
|
return |
| 402 |
|
|
end subroutine useGeometricMixing |
| 403 |
|
|
|
| 404 |
chuckv |
702 |
|
| 405 |
|
|
|
| 406 |
|
|
|
| 407 |
chuckv |
728 |
|
| 408 |
|
|
|
| 409 |
|
|
|
| 410 |
|
|
|
| 411 |
|
|
|
| 412 |
|
|
subroutine clean_SC() |
| 413 |
|
|
|
| 414 |
chuckv |
702 |
! clean non-IS_MPI first |
| 415 |
|
|
frho = 0.0_dp |
| 416 |
|
|
rho = 0.0_dp |
| 417 |
|
|
dfrhodrho = 0.0_dp |
| 418 |
|
|
! clean MPI if needed |
| 419 |
|
|
#ifdef IS_MPI |
| 420 |
|
|
frho_row = 0.0_dp |
| 421 |
|
|
frho_col = 0.0_dp |
| 422 |
|
|
rho_row = 0.0_dp |
| 423 |
|
|
rho_col = 0.0_dp |
| 424 |
|
|
rho_tmp = 0.0_dp |
| 425 |
|
|
dfrhodrho_row = 0.0_dp |
| 426 |
|
|
dfrhodrho_col = 0.0_dp |
| 427 |
|
|
#endif |
| 428 |
chuckv |
728 |
end subroutine clean_SC |
| 429 |
chuckv |
702 |
|
| 430 |
|
|
|
| 431 |
|
|
|
| 432 |
|
|
!! Calculates rho_r |
| 433 |
chuckv |
713 |
subroutine calc_sc_prepair_rho(atom1,atom2,d,r,rijsq) |
| 434 |
chuckv |
702 |
integer :: atom1,atom2 |
| 435 |
|
|
real(kind = dp), dimension(3) :: d |
| 436 |
|
|
real(kind = dp), intent(inout) :: r |
| 437 |
|
|
real(kind = dp), intent(inout) :: rijsq |
| 438 |
|
|
! value of electron density rho do to atom i at atom j |
| 439 |
|
|
real(kind = dp) :: rho_i_at_j |
| 440 |
|
|
! value of electron density rho do to atom j at atom i |
| 441 |
|
|
real(kind = dp) :: rho_j_at_i |
| 442 |
|
|
|
| 443 |
|
|
! we don't use the derivatives, dummy variables |
| 444 |
chuckv |
728 |
real( kind = dp) :: drho |
| 445 |
chuckv |
714 |
integer :: sc_err |
| 446 |
chuckv |
702 |
|
| 447 |
|
|
integer :: atid1,atid2 ! Global atid |
| 448 |
|
|
integer :: myid_atom1 ! EAM atid |
| 449 |
|
|
integer :: myid_atom2 |
| 450 |
|
|
|
| 451 |
|
|
|
| 452 |
|
|
! check to see if we need to be cleaned at the start of a force loop |
| 453 |
|
|
|
| 454 |
|
|
|
| 455 |
|
|
|
| 456 |
|
|
|
| 457 |
|
|
#ifdef IS_MPI |
| 458 |
|
|
Atid1 = Atid_row(Atom1) |
| 459 |
|
|
Atid2 = Atid_col(Atom2) |
| 460 |
|
|
#else |
| 461 |
|
|
Atid1 = Atid(Atom1) |
| 462 |
|
|
Atid2 = Atid(Atom2) |
| 463 |
|
|
#endif |
| 464 |
|
|
|
| 465 |
chuckv |
728 |
Myid_atom1 = SCList%atidtoSCtype(Atid1) |
| 466 |
|
|
Myid_atom2 = SCList%atidtoSCtype(Atid2) |
| 467 |
chuckv |
702 |
|
| 468 |
|
|
|
| 469 |
|
|
|
| 470 |
chuckv |
713 |
rho_i_at_j = (MixingMap(Myid_atom1,Myid_atom2)%alpha/r)& |
| 471 |
|
|
**MixingMap(Myid_atom1,Myid_atom2)%m |
| 472 |
|
|
rho_j_at_i = rho_i_at_j |
| 473 |
chuckv |
702 |
|
| 474 |
|
|
#ifdef IS_MPI |
| 475 |
|
|
rho_col(atom2) = rho_col(atom2) + rho_i_at_j |
| 476 |
chuckv |
713 |
rho_row(atom1) = rho_row(atom1) + rho_j_at_i |
| 477 |
chuckv |
702 |
#else |
| 478 |
|
|
rho(atom2) = rho(atom2) + rho_i_at_j |
| 479 |
|
|
rho(atom1) = rho(atom1) + rho_j_at_i |
| 480 |
|
|
#endif |
| 481 |
|
|
|
| 482 |
chuckv |
713 |
end subroutine calc_sc_prepair_rho |
| 483 |
chuckv |
702 |
|
| 484 |
|
|
|
| 485 |
chuckv |
714 |
!! Calculate the rho_a for all local atoms |
| 486 |
chuckv |
728 |
subroutine calc_sc_preforce_Frho(nlocal,pot) |
| 487 |
chuckv |
702 |
integer :: nlocal |
| 488 |
|
|
real(kind=dp) :: pot |
| 489 |
|
|
integer :: i,j |
| 490 |
|
|
integer :: atom |
| 491 |
|
|
real(kind=dp) :: U,U1,U2 |
| 492 |
|
|
integer :: atype1 |
| 493 |
chuckv |
728 |
integer :: atid1 |
| 494 |
|
|
integer :: myid |
| 495 |
chuckv |
702 |
|
| 496 |
|
|
|
| 497 |
|
|
cleanme = .true. |
| 498 |
|
|
!! Scatter the electron density from pre-pair calculation back to local atoms |
| 499 |
|
|
#ifdef IS_MPI |
| 500 |
chuckv |
714 |
call scatter(rho_row,rho,plan_atom_row,sc_err) |
| 501 |
|
|
if (sc_err /= 0 ) then |
| 502 |
chuckv |
702 |
write(errMsg,*) " Error scattering rho_row into rho" |
| 503 |
|
|
call handleError(RoutineName,errMesg) |
| 504 |
|
|
endif |
| 505 |
chuckv |
714 |
call scatter(rho_col,rho_tmp,plan_atom_col,sc_err) |
| 506 |
|
|
if (sc_err /= 0 ) then |
| 507 |
chuckv |
702 |
write(errMsg,*) " Error scattering rho_col into rho" |
| 508 |
|
|
call handleError(RoutineName,errMesg) |
| 509 |
chuckv |
713 |
|
| 510 |
chuckv |
702 |
endif |
| 511 |
|
|
|
| 512 |
|
|
rho(1:nlocal) = rho(1:nlocal) + rho_tmp(1:nlocal) |
| 513 |
|
|
#endif |
| 514 |
|
|
|
| 515 |
|
|
|
| 516 |
|
|
|
| 517 |
chuckv |
713 |
!! Calculate F(rho) and derivative |
| 518 |
chuckv |
702 |
do atom = 1, nlocal |
| 519 |
chuckv |
728 |
Myid = SCList%atidtoSctype(Atid(atom)) |
| 520 |
|
|
frho(atom) = -SCList%SCTypes(Myid)%c * & |
| 521 |
|
|
SCList%SCTypes(Myid)%epsilon * sqrt(rho(i)) |
| 522 |
|
|
|
| 523 |
chuckv |
713 |
dfrhodrho(atom) = 0.5_dp*frho(atom)/rho(atom) |
| 524 |
chuckv |
702 |
pot = pot + u |
| 525 |
|
|
enddo |
| 526 |
|
|
|
| 527 |
chuckv |
731 |
#ifdef IS_MPI |
| 528 |
chuckv |
702 |
!! communicate f(rho) and derivatives back into row and column arrays |
| 529 |
chuckv |
714 |
call gather(frho,frho_row,plan_atom_row, sc_err) |
| 530 |
|
|
if (sc_err /= 0) then |
| 531 |
chuckv |
702 |
call handleError("cal_eam_forces()","MPI gather frho_row failure") |
| 532 |
|
|
endif |
| 533 |
chuckv |
714 |
call gather(dfrhodrho,dfrhodrho_row,plan_atom_row, sc_err) |
| 534 |
|
|
if (sc_err /= 0) then |
| 535 |
chuckv |
702 |
call handleError("cal_eam_forces()","MPI gather dfrhodrho_row failure") |
| 536 |
|
|
endif |
| 537 |
chuckv |
714 |
call gather(frho,frho_col,plan_atom_col, sc_err) |
| 538 |
|
|
if (sc_err /= 0) then |
| 539 |
chuckv |
702 |
call handleError("cal_eam_forces()","MPI gather frho_col failure") |
| 540 |
|
|
endif |
| 541 |
chuckv |
714 |
call gather(dfrhodrho,dfrhodrho_col,plan_atom_col, sc_err) |
| 542 |
|
|
if (sc_err /= 0) then |
| 543 |
chuckv |
702 |
call handleError("cal_eam_forces()","MPI gather dfrhodrho_col failure") |
| 544 |
|
|
endif |
| 545 |
|
|
#endif |
| 546 |
chuckv |
713 |
|
| 547 |
|
|
|
| 548 |
chuckv |
728 |
end subroutine calc_sc_preforce_Frho |
| 549 |
chuckv |
702 |
|
| 550 |
|
|
|
| 551 |
chuckv |
713 |
!! Does Sutton-Chen pairwise Force calculation. |
| 552 |
chuckv |
728 |
subroutine do_sc_pair(atom1, atom2, d, rij, r2, sw, vpair, fpair, & |
| 553 |
chuckv |
702 |
pot, f, do_pot) |
| 554 |
|
|
!Arguments |
| 555 |
|
|
integer, intent(in) :: atom1, atom2 |
| 556 |
|
|
real( kind = dp ), intent(in) :: rij, r2 |
| 557 |
|
|
real( kind = dp ) :: pot, sw, vpair |
| 558 |
|
|
real( kind = dp ), dimension(3,nLocal) :: f |
| 559 |
|
|
real( kind = dp ), intent(in), dimension(3) :: d |
| 560 |
|
|
real( kind = dp ), intent(inout), dimension(3) :: fpair |
| 561 |
|
|
|
| 562 |
|
|
logical, intent(in) :: do_pot |
| 563 |
|
|
|
| 564 |
|
|
real( kind = dp ) :: drdx,drdy,drdz |
| 565 |
chuckv |
728 |
real( kind = dp ) :: dvpdr |
| 566 |
|
|
real( kind = dp ) :: drhodr |
| 567 |
chuckv |
702 |
real( kind = dp ) :: dudr |
| 568 |
chuckv |
714 |
real( kind = dp ) :: rcij |
| 569 |
chuckv |
702 |
real( kind = dp ) :: drhoidr,drhojdr |
| 570 |
|
|
real( kind = dp ) :: Fx,Fy,Fz |
| 571 |
|
|
real( kind = dp ) :: r,d2pha,phb,d2phb |
| 572 |
chuckv |
728 |
real( kind = dp ) :: pot_temp,vptmp |
| 573 |
|
|
real( kind = dp ) :: epsilonij,aij,nij,mij,vcij |
| 574 |
chuckv |
702 |
integer :: id1,id2 |
| 575 |
|
|
integer :: mytype_atom1 |
| 576 |
|
|
integer :: mytype_atom2 |
| 577 |
|
|
integer :: atid1,atid2 |
| 578 |
|
|
!Local Variables |
| 579 |
|
|
|
| 580 |
|
|
! write(*,*) "Frho: ", Frho(atom1) |
| 581 |
|
|
|
| 582 |
chuckv |
728 |
|
| 583 |
chuckv |
702 |
dvpdr = 0.0E0_DP |
| 584 |
|
|
|
| 585 |
|
|
|
| 586 |
|
|
#ifdef IS_MPI |
| 587 |
|
|
atid1 = atid_row(atom1) |
| 588 |
|
|
atid2 = atid_col(atom2) |
| 589 |
|
|
#else |
| 590 |
|
|
atid1 = atid(atom1) |
| 591 |
|
|
atid2 = atid(atom2) |
| 592 |
|
|
#endif |
| 593 |
|
|
|
| 594 |
chuckv |
728 |
mytype_atom1 = SCList%atidToSCType(atid1) |
| 595 |
|
|
mytype_atom2 = SCList%atidTOSCType(atid2) |
| 596 |
chuckv |
702 |
|
| 597 |
|
|
drdx = d(1)/rij |
| 598 |
|
|
drdy = d(2)/rij |
| 599 |
|
|
drdz = d(3)/rij |
| 600 |
|
|
|
| 601 |
chuckv |
714 |
|
| 602 |
|
|
epsilonij = MixingMap(mytype_atom1,mytype_atom2)%epsilon |
| 603 |
|
|
aij = MixingMap(mytype_atom1,mytype_atom2)%alpha |
| 604 |
|
|
nij = MixingMap(mytype_atom1,mytype_atom2)%n |
| 605 |
|
|
mij = MixingMap(mytype_atom1,mytype_atom2)%m |
| 606 |
|
|
vcij = MixingMap(mytype_atom1,mytype_atom2)%vpair_pot |
| 607 |
chuckv |
702 |
|
| 608 |
chuckv |
728 |
vptmp = epsilonij*((aij/r)**nij) |
| 609 |
chuckv |
702 |
|
| 610 |
|
|
|
| 611 |
chuckv |
714 |
dvpdr = -nij*vptmp/r |
| 612 |
|
|
drhodr = -mij*((aij/r)**mij)/r |
| 613 |
chuckv |
728 |
|
| 614 |
chuckv |
714 |
|
| 615 |
chuckv |
728 |
dudr = drhodr*(dfrhodrho(atom1)+dfrhodrho(atom2)) & |
| 616 |
chuckv |
714 |
+ dvpdr |
| 617 |
chuckv |
728 |
|
| 618 |
|
|
pot_temp = vptmp + vcij |
| 619 |
chuckv |
714 |
|
| 620 |
chuckv |
702 |
|
| 621 |
|
|
#ifdef IS_MPI |
| 622 |
chuckv |
714 |
dudr = drhodr*(dfrhodrho_row(atom1)+dfrhodrho_col(atom2)) & |
| 623 |
chuckv |
702 |
+ dvpdr |
| 624 |
|
|
|
| 625 |
|
|
#else |
| 626 |
chuckv |
714 |
dudr = drhodr*(dfrhodrho(atom1)+dfrhodrho(atom2)) & |
| 627 |
chuckv |
702 |
+ dvpdr |
| 628 |
|
|
#endif |
| 629 |
|
|
|
| 630 |
chuckv |
714 |
|
| 631 |
chuckv |
702 |
fx = dudr * drdx |
| 632 |
|
|
fy = dudr * drdy |
| 633 |
|
|
fz = dudr * drdz |
| 634 |
|
|
|
| 635 |
|
|
|
| 636 |
|
|
#ifdef IS_MPI |
| 637 |
|
|
if (do_pot) then |
| 638 |
chuckv |
728 |
pot_Row(METALLIC_POT,atom1) = pot_Row(METALLIC_POT,atom1) + (pot_temp)*0.5 |
| 639 |
|
|
pot_Col(METALLIC_POT,atom2) = pot_Col(METALLIC_POT,atom2) + (pot_temp)*0.5 |
| 640 |
chuckv |
702 |
end if |
| 641 |
|
|
|
| 642 |
|
|
f_Row(1,atom1) = f_Row(1,atom1) + fx |
| 643 |
|
|
f_Row(2,atom1) = f_Row(2,atom1) + fy |
| 644 |
|
|
f_Row(3,atom1) = f_Row(3,atom1) + fz |
| 645 |
|
|
|
| 646 |
|
|
f_Col(1,atom2) = f_Col(1,atom2) - fx |
| 647 |
|
|
f_Col(2,atom2) = f_Col(2,atom2) - fy |
| 648 |
|
|
f_Col(3,atom2) = f_Col(3,atom2) - fz |
| 649 |
|
|
#else |
| 650 |
|
|
|
| 651 |
|
|
if(do_pot) then |
| 652 |
chuckv |
728 |
pot = pot + pot_temp |
| 653 |
chuckv |
702 |
end if |
| 654 |
|
|
|
| 655 |
|
|
f(1,atom1) = f(1,atom1) + fx |
| 656 |
|
|
f(2,atom1) = f(2,atom1) + fy |
| 657 |
|
|
f(3,atom1) = f(3,atom1) + fz |
| 658 |
|
|
|
| 659 |
|
|
f(1,atom2) = f(1,atom2) - fx |
| 660 |
|
|
f(2,atom2) = f(2,atom2) - fy |
| 661 |
|
|
f(3,atom2) = f(3,atom2) - fz |
| 662 |
|
|
#endif |
| 663 |
|
|
|
| 664 |
chuckv |
728 |
|
| 665 |
chuckv |
702 |
#ifdef IS_MPI |
| 666 |
|
|
id1 = AtomRowToGlobal(atom1) |
| 667 |
|
|
id2 = AtomColToGlobal(atom2) |
| 668 |
|
|
#else |
| 669 |
|
|
id1 = atom1 |
| 670 |
|
|
id2 = atom2 |
| 671 |
|
|
#endif |
| 672 |
|
|
|
| 673 |
|
|
if (molMembershipList(id1) .ne. molMembershipList(id2)) then |
| 674 |
|
|
|
| 675 |
|
|
fpair(1) = fpair(1) + fx |
| 676 |
|
|
fpair(2) = fpair(2) + fy |
| 677 |
|
|
fpair(3) = fpair(3) + fz |
| 678 |
|
|
|
| 679 |
|
|
endif |
| 680 |
|
|
|
| 681 |
|
|
|
| 682 |
chuckv |
728 |
end subroutine do_sc_pair |
| 683 |
chuckv |
702 |
|
| 684 |
|
|
|
| 685 |
|
|
|
| 686 |
chuckv |
713 |
end module suttonchen |
