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c -*-Fortran-*-
c $Header: /home/eschnett/C/carpet/Carpet/CarpetExtra/SpaceTimeToy/src/SpaceTimeToy.F77,v 1.11 2003/10/27 15:31:40 schnetter Exp $
#include "cctk.h"
#include "cctk_Arguments.h"
#include "cctk_Parameters.h"
#include "cctk_Functions.h"
subroutine SpaceTimeToy_EulerStep (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)
phi_i(i,j,k) = phi_p(i,j,k)
psi_i(i,j,k) = psi_p(i,j,k)
end do
end do
end do
if (hydrotoy_active.eq.1) then
do k=1,cctk_lsh(3)
do j=1,cctk_lsh(2)
do i=1,cctk_lsh(1)
u_i(i,j,k) = u_p(i,j,k)
vx_i(i,j,k) = vx_p(i,j,k)
vy_i(i,j,k) = vy_p(i,j,k)
vz_i(i,j,k) = vz_p(i,j,k)
end do
end do
end do
else
do k=1,cctk_lsh(3)
do j=1,cctk_lsh(2)
do i=1,cctk_lsh(1)
u_i(i,j,k) = 0
vx_i(i,j,k) = 0
vy_i(i,j,k) = 0
vz_i(i,j,k) = 0
end do
end do
end do
end if
c Evolve
call SpaceTimeToy_Step (CCTK_PASS_FTOF)
c Initialise ICN iterations
icn_iteration = 0
do_iterate = 1
if (icn_iteration .eq. icn_iterations) then
do_iterate = 0
end if
end
subroutine SpaceTimeToy_ICNStep (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 Average
do k=1,cctk_lsh(3)
do j=1,cctk_lsh(2)
do i=1,cctk_lsh(1)
phi_i(i,j,k) = half * (phi_p(i,j,k) + phi(i,j,k))
psi_i(i,j,k) = half * (psi_p(i,j,k) + psi(i,j,k))
end do
end do
end do
if (hydrotoy_active.eq.1) then
do k=1,cctk_lsh(3)
do j=1,cctk_lsh(2)
do i=1,cctk_lsh(1)
u_i(i,j,k) = half * (u_p(i,j,k) + u(i,j,k))
vx_i(i,j,k) = half * (vx_p(i,j,k) + vx(i,j,k))
vy_i(i,j,k) = half * (vy_p(i,j,k) + vy(i,j,k))
vz_i(i,j,k) = half * (vz_p(i,j,k) + vz(i,j,k))
end do
end do
end do
else
do k=1,cctk_lsh(3)
do j=1,cctk_lsh(2)
do i=1,cctk_lsh(1)
u_i(i,j,k) = 0
vx_i(i,j,k) = 0
vy_i(i,j,k) = 0
vz_i(i,j,k) = 0
end do
end do
end do
end if
c Evolve
call SpaceTimeToy_Step (CCTK_PASS_FTOF)
c Step ICN iterations
icn_iteration = icn_iteration + 1
if (icn_iteration .eq. icn_iterations) then
do_iterate = 0
end if
end
subroutine SpaceTimeToy_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_nghostzones(3),cctk_lsh(3)-cctk_nghostzones(3)
do j=1+cctk_nghostzones(2),cctk_lsh(2)-cctk_nghostzones(2)
do i=1+cctk_nghostzones(1),cctk_lsh(1)-cctk_nghostzones(1)
phi(i,j,k) = phi_p(i,j,k)
$ + dt * psi_i(i,j,k)
$ + dt * u_i(i,j,k)
psi(i,j,k) = psi_p(i,j,k)
$ + dt * (phi_i(i-1,j,k) - 2*phi_i(i,j,k) + phi_i(i+1,j,k)) / dx**2
$ + dt * (phi_i(i,j-1,k) - 2*phi_i(i,j,k) + phi_i(i,j+1,k)) / dy**2
$ + dt * (phi_i(i,j,k-1) - 2*phi_i(i,j,k) + phi_i(i,j,k+1)) / dz**2
$ - 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)
end do
end do
end do
end
subroutine SpaceTimeToy_Boundaries (CCTK_ARGUMENTS)
implicit none
DECLARE_CCTK_ARGUMENTS
DECLARE_CCTK_FUNCTIONS
DECLARE_CCTK_PARAMETERS
character fbound*1000
CCTK_INT fboundlen
integer options
CCTK_INT boundary_width
CCTK_INT options1
integer d
integer ierr
boundary_width = cctk_nghostzones(1)
do d=1,3
if (cctk_nghostzones(d) .ne. boundary_width) then
call CCTK_WARN (0, "internal error")
end if
end do
call Util_TableCreateFromString (options, "")
if (options .lt. 0) call CCTK_WARN (0, "internal error")
call CCTK_FortranString (fboundlen, bound, fbound)
options1 = options
ierr = Boundary_SelectGroupForBC (cctkGH, CCTK_ALL_FACES, boundary_width, options1, "spacetimetoy::spacetimeevolve", fbound)
if (ierr .lt. 0) then
call CCTK_WARN (0, "Error while selecting boundary condition")
end if
call Util_TableDestroy (ierr, options)
if (ierr .lt. 0) call CCTK_WARN (0, "internal error")
call Cart3dSymGN (ierr, cctkGH, "spacetimetoy::spacetimeevolve")
if (ierr .lt. 0) then
call CCTK_WARN (0, "Error while applying symmetry condition")
end if
end
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