1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
#include "cctk.h"
#include "cctk_Arguments.h"
#include "cctk_Functions.h"
#include "cctk_Parameters.h"
subroutine WaveToyMoL_CalcRHS (CCTK_ARGUMENTS)
implicit none
DECLARE_CCTK_ARGUMENTS
DECLARE_CCTK_FUNCTIONS
DECLARE_CCTK_PARAMETERS
CCTK_INT bndwidth
parameter (bndwidth = 1)
integer imin(3), imax(3)
CCTK_REAL dx(3)
integer i, j, k
logical isnearboundary
integer d
do d=1,3
imin(d) = 1+cctk_nghostzones(d)
imax(d) = cctk_lsh(d)-cctk_nghostzones(d)
if (cctk_bbox(2*d-1).ne.0) imin(d) = 1+bndwidth
if (cctk_bbox(2*d ).ne.0) imax(d) = cctk_lsh(d)-bndwidth
end do
do d=1,3
dx(d) = CCTK_DELTA_SPACE(3)
end do
do k=imin(3),imax(3)
do j=imin(2),imax(2)
do i=imin(1),imax(1)
phidot(i,j,k) = psi(i,j,k)
isnearboundary = .false.
isnearboundary = isnearboundary .or. i.eq.imin(1) .or. i.eq.imax(1)
isnearboundary = isnearboundary .or. j.eq.imin(2) .or. j.eq.imax(2)
isnearboundary = isnearboundary .or. k.eq.imin(3) .or. k.eq.imax(3)
if (order.eq.2 .or. isnearboundary) then
psidot(i,j,k) = (
$ + (phi(i-1,j,k) - 2*phi(i,j,k) + phi(i+1,j,k)) / dx(1)**2
$ + (phi(i,j-1,k) - 2*phi(i,j,k) + phi(i,j+1,k)) / dx(2)**2
$ + (phi(i,j,k-1) - 2*phi(i,j,k) + phi(i,j,k+1)) / dx(3)**2)
else if (order.eq.4) then
psidot(i,j,k) = (
$ + (- phi(i-2,j,k) + 16*phi(i-1,j,k) - 30*phi(i,j,k) + 16*phi(i+1,j,k) - phi(i+2,j,k)) / (12 * dx(1)**2)
$ + (- phi(i,j-2,k) + 16*phi(i,j-1,k) - 30*phi(i,j,k) + 16*phi(i,j+1,k) - phi(i,j+2,k)) / (12 * dx(2)**2)
$ + (- phi(i,j,k-2) + 16*phi(i,j,k-1) - 30*phi(i,j,k) + 16*phi(i,j,k+1) - phi(i,j,k+2)) / (12 * dx(3)**2))
else
call CCTK_WARN (0, "internal error")
end if
end do
end do
end do
end
|
