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advec_cell_kernel.f90
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advec_cell_kernel.f90
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!Crown Copyright 2012 AWE.
!
! This file is part of CloverLeaf.
!
! CloverLeaf is free software: you can redistribute it and/or modify it under
! the terms of the GNU General Public License as published by the
! Free Software Foundation, either version 3 of the License, or (at your option)
! any later version.
!
! CloverLeaf is distributed in the hope that it will be useful, but
! WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
! FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
! details.
!
! You should have received a copy of the GNU General Public License along with
! CloverLeaf. If not, see http://www.gnu.org/licenses/.
!> @brief Fortran cell advection kernel.
!> @author Wayne Gaudin
!> @details Performs a second order advective remap using van-Leer limiting
!> with directional splitting.
MODULE advec_cell_kernel_module
CONTAINS
SUBROUTINE advec_cell_kernel(g_mic_device,&
x_min, &
x_max, &
y_min, &
y_max, &
dir, &
sweep_number,&
vector, &
vertexdx, &
vertexdy, &
volume, &
density1, &
energy1, &
mass_flux_x, &
vol_flux_x, &
mass_flux_y, &
vol_flux_y, &
pre_vol, &
post_vol, &
pre_mass, &
post_mass, &
advec_vol, &
post_ener, &
ener_flux )
IMPLICIT NONE
INTEGER :: g_mic_device
INTEGER :: x_min,x_max,y_min,y_max
INTEGER :: sweep_number,dir
INTEGER :: g_xdir=1,g_ydir=2
LOGICAL :: vector
REAL(KIND=8), DIMENSION(x_min-2:x_max+2,y_min-2:y_max+2) :: volume
REAL(KIND=8), DIMENSION(x_min-2:x_max+2,y_min-2:y_max+2) :: density1
REAL(KIND=8), DIMENSION(x_min-2:x_max+2,y_min-2:y_max+2) :: energy1
REAL(KIND=8), DIMENSION(x_min-2:x_max+3,y_min-2:y_max+2) :: vol_flux_x
REAL(KIND=8), DIMENSION(x_min-2:x_max+2,y_min-2:y_max+3) :: vol_flux_y
REAL(KIND=8), DIMENSION(x_min-2:x_max+3,y_min-2:y_max+2) :: mass_flux_x
REAL(KIND=8), DIMENSION(x_min-2:x_max+2,y_min-2:y_max+3) :: mass_flux_y
REAL(KIND=8), DIMENSION(x_min-2:x_max+3,y_min-2:y_max+3) :: pre_vol
REAL(KIND=8), DIMENSION(x_min-2:x_max+3,y_min-2:y_max+3) :: post_vol
REAL(KIND=8), DIMENSION(x_min-2:x_max+3,y_min-2:y_max+3) :: pre_mass
REAL(KIND=8), DIMENSION(x_min-2:x_max+3,y_min-2:y_max+3) :: post_mass
REAL(KIND=8), DIMENSION(x_min-2:x_max+3,y_min-2:y_max+3) :: advec_vol
REAL(KIND=8), DIMENSION(x_min-2:x_max+3,y_min-2:y_max+3) :: post_ener
REAL(KIND=8), DIMENSION(x_min-2:x_max+3,y_min-2:y_max+3) :: ener_flux
REAL(KIND=8), DIMENSION(x_min-2:x_max+3) :: vertexdx
REAL(KIND=8), DIMENSION(y_min-2:y_max+3) :: vertexdy
INTEGER :: j,k,upwind,donor,downwind,dif
REAL(KIND=8) :: sigma,sigmat,sigmav,sigmam,sigma3,sigma4
REAL(KIND=8) :: diffuw,diffdw,limiter
REAL(KIND=8), PARAMETER :: one_by_six=1.0/6.0
!DIR$ OFFLOAD TARGET(MIC:g_mic_device) &
!DIR$ in(density1 :length(0) alloc_if(.false.) free_if(.false.)) &
!DIR$ in(energy1 :length(0) alloc_if(.false.) free_if(.false.)) &
!DIR$ in(vol_flux_x :length(0) alloc_if(.false.) free_if(.false.)) &
!DIR$ in(vol_flux_y :length(0) alloc_if(.false.) free_if(.false.)) &
!DIR$ in(volume :length(0) alloc_if(.false.) free_if(.false.)) &
!DIR$ in(mass_flux_x :length(0) alloc_if(.false.) free_if(.false.)) &
!DIR$ in(mass_flux_y :length(0) alloc_if(.false.) free_if(.false.)) &
!DIR$ in(vertexdx :length(0) alloc_if(.false.) free_if(.false.)) &
!DIR$ in(vertexdy :length(0) alloc_if(.false.) free_if(.false.)) &
!DIR$ in(pre_vol :length(0) alloc_if(.false.) free_if(.false.)) &
!DIR$ in(post_vol :length(0) alloc_if(.false.) free_if(.false.)) &
!DIR$ in(post_ener :length(0) alloc_if(.false.) free_if(.false.)) &
!DIR$ in(pre_mass :length(0) alloc_if(.false.) free_if(.false.)) &
!DIR$ in(post_mass :length(0) alloc_if(.false.) free_if(.false.)) &
!DIR$ in(advec_vol :length(0) alloc_if(.false.) free_if(.false.)) &
!DIR$ in(ener_flux :length(0) alloc_if(.false.) free_if(.false.))
!$OMP PARALLEL
IF(dir.EQ.g_xdir) THEN
IF(sweep_number.EQ.1)THEN
!$OMP DO
DO k=y_min-2,y_max+2
DO j=x_min-2,x_max+2
pre_vol(j,k)=volume(j,k)+(vol_flux_x(j+1,k )-vol_flux_x(j,k)+vol_flux_y(j ,k+1)-vol_flux_y(j,k))
post_vol(j,k)=pre_vol(j,k)-(vol_flux_x(j+1,k )-vol_flux_x(j,k))
ENDDO
ENDDO
!$OMP END DO
ELSE
!$OMP DO
DO k=y_min-2,y_max+2
DO j=x_min-2,x_max+2
pre_vol(j,k)=volume(j,k)+vol_flux_x(j+1,k)-vol_flux_x(j,k)
post_vol(j,k)=volume(j,k)
ENDDO
ENDDO
!$OMP END DO
ENDIF
!$OMP DO PRIVATE(upwind,donor,downwind,dif,sigmat,sigma3,sigma4,sigmav,sigma,sigmam, &
!$OMP diffuw,diffdw,limiter)
DO k=y_min,y_max
DO j=x_min,x_max+2
IF(vol_flux_x(j,k).GT.0.0)THEN
upwind =j-2
donor =j-1
downwind =j
dif =donor
ELSE
upwind =MIN(j+1,x_max+2)
donor =j
downwind =j-1
dif =upwind
ENDIF
sigmat=ABS(vol_flux_x(j,k))/pre_vol(donor,k)
sigma3=(1.0+sigmat)*(vertexdx(j)/vertexdx(dif))
sigma4=2.0-sigmat
sigma=sigmat
sigmav=sigmat
diffuw=density1(donor,k)-density1(upwind,k)
diffdw=density1(downwind,k)-density1(donor,k)
IF(diffuw*diffdw.GT.0.0)THEN
limiter=(1.0-sigmav)*SIGN(1.0_8,diffdw)*MIN(ABS(diffuw),ABS(diffdw)&
,one_by_six*(sigma3*ABS(diffuw)+sigma4*ABS(diffdw)))
ELSE
limiter=0.0
ENDIF
mass_flux_x(j,k)=vol_flux_x(j,k)*(density1(donor,k)+limiter)
sigmam=ABS(mass_flux_x(j,k))/(density1(donor,k)*pre_vol(donor,k))
diffuw=energy1(donor,k)-energy1(upwind,k)
diffdw=energy1(downwind,k)-energy1(donor,k)
IF(diffuw*diffdw.GT.0.0)THEN
limiter=(1.0-sigmam)*SIGN(1.0_8,diffdw)*MIN(ABS(diffuw),ABS(diffdw)&
,one_by_six*(sigma3*ABS(diffuw)+sigma4*ABS(diffdw)))
ELSE
limiter=0.0
ENDIF
ener_flux(j,k)=mass_flux_x(j,k)*(energy1(donor,k)+limiter)
ENDDO
ENDDO
!$OMP END DO
!$OMP DO
DO k=y_min,y_max
DO j=x_min,x_max
pre_mass(j,k)=density1(j,k)*pre_vol(j,k)
post_mass(j,k)=pre_mass(j,k)+mass_flux_x(j,k)-mass_flux_x(j+1,k)
post_ener(j,k)=(energy1(j,k)*pre_mass(j,k)+ener_flux(j,k)-ener_flux(j+1,k))/post_mass(j,k)
advec_vol(j,k)=pre_vol(j,k)+vol_flux_x(j,k)-vol_flux_x(j+1,k)
density1(j,k)=post_mass(j,k)/advec_vol(j,k)
energy1(j,k)=post_ener(j,k)
ENDDO
ENDDO
!$OMP END DO
ELSEIF(dir.EQ.g_ydir) THEN
IF(sweep_number.EQ.1)THEN
!$OMP DO
DO k=y_min-2,y_max+2
DO j=x_min-2,x_max+2
pre_vol(j,k)=volume(j,k)+(vol_flux_y(j ,k+1)-vol_flux_y(j,k)+vol_flux_x(j+1,k )-vol_flux_x(j,k))
post_vol(j,k)=pre_vol(j,k)-(vol_flux_y(j ,k+1)-vol_flux_y(j,k))
ENDDO
ENDDO
!$OMP END DO
ELSE
!$OMP DO
DO k=y_min-2,y_max+2
DO j=x_min-2,x_max+2
pre_vol(j,k)=volume(j,k)+vol_flux_y(j ,k+1)-vol_flux_y(j,k)
post_vol(j,k)=volume(j,k)
ENDDO
ENDDO
!$OMP END DO
ENDIF
!$OMP DO PRIVATE(upwind,donor,downwind,dif,sigmat,sigma3,sigma4,sigmav,sigma,sigmam, &
!$OMP diffuw,diffdw,limiter)
DO k=y_min,y_max+2
DO j=x_min,x_max
IF(vol_flux_y(j,k).GT.0.0)THEN
upwind =k-2
donor =k-1
downwind =k
dif =donor
ELSE
upwind =MIN(k+1,y_max+2)
donor =k
downwind =k-1
dif =upwind
ENDIF
sigmat=ABS(vol_flux_y(j,k))/pre_vol(j,donor)
sigma3=(1.0+sigmat)*(vertexdy(k)/vertexdy(dif))
sigma4=2.0-sigmat
sigma=sigmat
sigmav=sigmat
diffuw=density1(j,donor)-density1(j,upwind)
diffdw=density1(j,downwind)-density1(j,donor)
IF(diffuw*diffdw.GT.0.0)THEN
limiter=(1.0-sigmav)*SIGN(1.0_8,diffdw)*MIN(ABS(diffuw),ABS(diffdw)&
,one_by_six*(sigma3*ABS(diffuw)+sigma4*ABS(diffdw)))
ELSE
limiter=0.0
ENDIF
mass_flux_y(j,k)=vol_flux_y(j,k)*(density1(j,donor)+limiter)
sigmam=ABS(mass_flux_y(j,k))/(density1(j,donor)*pre_vol(j,donor))
diffuw=energy1(j,donor)-energy1(j,upwind)
diffdw=energy1(j,downwind)-energy1(j,donor)
IF(diffuw*diffdw.GT.0.0)THEN
limiter=(1.0-sigmam)*SIGN(1.0_8,diffdw)*MIN(ABS(diffuw),ABS(diffdw)&
,one_by_six*(sigma3*ABS(diffuw)+sigma4*ABS(diffdw)))
ELSE
limiter=0.0
ENDIF
ener_flux(j,k)=mass_flux_y(j,k)*(energy1(j,donor)+limiter)
ENDDO
ENDDO
!$OMP END DO
!$OMP DO
DO k=y_min,y_max
DO j=x_min,x_max
pre_mass(j,k)=density1(j,k)*pre_vol(j,k)
post_mass(j,k)=pre_mass(j,k)+mass_flux_y(j,k)-mass_flux_y(j,k+1)
post_ener(j,k)=(energy1(j,k)*pre_mass(j,k)+ener_flux(j,k)-ener_flux(j,k+1))/post_mass(j,k)
advec_vol(j,k)=pre_vol(j,k)+vol_flux_y(j,k)-vol_flux_y(j,k+1)
density1(j,k)=post_mass(j,k)/advec_vol(j,k)
energy1(j,k)=post_ener(j,k)
ENDDO
ENDDO
!$OMP END DO
ENDIF
!$OMP END PARALLEL
END SUBROUTINE advec_cell_kernel
END MODULE advec_cell_kernel_module