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c -*-Fortran-*-
c $Header: /home/eschnett/C/carpet/Carpet/CarpetExtra/HydroToy/src/HydroToy.F77,v 1.2 2001/03/19 21:30:34 eschnett Exp $
#include "cctk.h"
#include "cctk_Parameters.h"
#include "cctk_Arguments.h"
subroutine HydroToy_EulerPredictor (CCTK_ARGUMENTS)
implicit none
DECLARE_CCTK_ARGUMENTS
DECLARE_CCTK_FUNCTIONS
DECLARE_CCTK_PARAMETERS
integer i,j,k
c Copy
do k=1,cctk_lsh(3)
do j=1,cctk_lsh(2)
do i=1,cctk_lsh(1)
u_i(i,j,k) = u(i,j,k)
vx_i(i,j,k) = vx(i,j,k)
vy_i(i,j,k) = vy(i,j,k)
vz_i(i,j,k) = vz(i,j,k)
end do
end do
end do
c Evolve
call HydroToy_Step (CCTK_PASS_FTOF)
c Apply boundaries
call HydroToy_Boundaries (CCTK_PASS_FTOF)
end
subroutine HydroToy_EulerCorrector (CCTK_ARGUMENTS)
implicit none
DECLARE_CCTK_ARGUMENTS
DECLARE_CCTK_FUNCTIONS
DECLARE_CCTK_PARAMETERS
CCTK_REAL two, half
parameter (two=2, half=1/two)
integer i,j,k
c Copy
do k=1,cctk_lsh(3)
do j=1,cctk_lsh(2)
do i=1,cctk_lsh(1)
u_i(i,j,k) = u_n(i,j,k)
vx_i(i,j,k) = vx_n(i,j,k)
vy_i(i,j,k) = vy_n(i,j,k)
vz_i(i,j,k) = vz_n(i,j,k)
end do
end do
end do
c Evolve
call HydroToy_Step (CCTK_PASS_FTOF)
c Average
do k=1,cctk_lsh(3)
do j=1,cctk_lsh(2)
do i=1,cctk_lsh(1)
u_n(i,j,k) = half * (u(i,j,k) + u_n(i,j,k))
vx_n(i,j,k) = half * (vx(i,j,k) + vx_n(i,j,k))
vy_n(i,j,k) = half * (vy(i,j,k) + vy_n(i,j,k))
vz_n(i,j,k) = half * (vz(i,j,k) + vz_n(i,j,k))
end do
end do
end do
c Apply boundaries
call HydroToy_Boundaries (CCTK_PASS_FTOF)
end
subroutine HydroToy_Step (CCTK_ARGUMENTS)
implicit none
DECLARE_CCTK_ARGUMENTS
DECLARE_CCTK_FUNCTIONS
DECLARE_CCTK_PARAMETERS
CCTK_REAL dx,dy,dz,dt
integer i,j,k
dx = CCTK_DELTA_SPACE(1)
dy = CCTK_DELTA_SPACE(2)
dz = CCTK_DELTA_SPACE(3)
dt = CCTK_DELTA_TIME
c Evolve
do k=1,cctk_lsh(3)
do j=1,cctk_lsh(2)
do i=1,cctk_lsh(1)
u_n(i,j,k) = u_i(i,j,k)
$ + dt * (vx_i(i+1,j,k) - vx_i(i-1,j,k)) / (2*dx)
$ + dt * (vy_i(i,j+1,k) - vy_i(i,j-1,k)) / (2*dy)
$ + dt * (vz_i(i,j,k+1) - vz_i(i,j,k-1)) / (2*dz)
vx_n(i,j,k) = vx_i(i,j,k)
$ + dt * (u_i(i+1,j,k) - u_i(i-1,j,k)) / (2*dx)
vy_n(i,j,k) = vy_i(i,j,k)
$ + dt * (u_i(i,j+1,k) - u_i(i,j-1,k)) / (2*dy)
vz_n(i,j,k) = vz_i(i,j,k)
$ + dt * (u_i(i,j,k+1) - u_i(i,j,k-1)) / (2*dz)
end do
end do
end do
end
subroutine HydroToy_Boundaries (CCTK_ARGUMENTS)
implicit none
DECLARE_CCTK_ARGUMENTS
DECLARE_CCTK_FUNCTIONS
DECLARE_CCTK_PARAMETERS
CCTK_REAL zero, one
parameter (zero=0, one=1)
CCTK_REAL finf, npow
parameter (finf=1, npow=1)
integer sw(3)
integer ierr
sw(1) = 1
sw(2) = 1
sw(3) = 1
c Apply boundary condition
if (CCTK_EQUALS(bound, "flat")) then
call BndFlatGN (ierr, cctkGH, sw, "hydrotoy::hydroevolve")
else if (CCTK_EQUALS(bound, "zero")) then
call BndScalarGN (ierr, cctkGH, zero, sw,
$ "hydrotoy::hydroevolve")
else if (CCTK_EQUALS(bound, "radiation")) then
call BndRadiativeGN (ierr, cctkGH, sw, zero, one,
$ "hydrotoy::hydroevolve", "hydrotoy::hydroevolve")
else if (CCTK_EQUALS(bound, "robin")) then
call BndRobinGN (ierr, cctkGH, sw, finf, npow,
$ "hydrotoy::hydroevolve")
else
call CCTK_WARN (0, "Internal error")
end if
if (ierr .lt. 0) then
call CCTK_WARN (0, "Error while applying boundary condition")
end if
call Cart3dSymGN (ierr, cctkGH, "hydrotoy::hydroevolve")
if (ierr .lt. 0) then
call CCTK_WARN (0, "Error while applying boundary condition")
end if
end
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