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Diffstat (limited to 'src/metrics/Minkowski_conf_wave.F')
| -rw-r--r-- | src/metrics/Minkowski_conf_wave.F | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/src/metrics/Minkowski_conf_wave.F b/src/metrics/Minkowski_conf_wave.F new file mode 100644 index 0000000..e2ed79a --- /dev/null +++ b/src/metrics/Minkowski_conf_wave.F @@ -0,0 +1,87 @@ +c $Header$ + +C Author: Frank Loeffler (frank.loeffler@aei.mpg.de) +C Licence: GPL 2 or later +C +C Note that this model explicitly sets the conformal factor psi , +C and thus does *NOT* work with the "arbitrary slice evolver" option +C of this thorn. + +#include "cctk.h" +#include "cctk_Parameters.h" +#include "cctk_Functions.h" + +#define Pi (4 * atan(1.d0)) + + + subroutine Exact__Minkowski_conf_wave( + $ x, y, z, t, + $ gdtt, gdtx, gdty, gdtz, + $ gdxx, gdyy, gdzz, gdxy, gdyz, gdzx, + $ gutt, gutx, guty, gutz, + $ guxx, guyy, guzz, guxy, guyz, guzx, + $ psi, Tmunu_flag) + + implicit none + DECLARE_CCTK_PARAMETERS + DECLARE_CCTK_FUNCTIONS + +c input arguments + CCTK_REAL x, y, z + CCTK_DECLARE(CCTK_REAL, t,) + +c output arguments + CCTK_REAL gdtt, gdtx, gdty, gdtz, + $ gdxx, gdyy, gdzz, gdxy, gdyz, gdzx, + $ gutt, gutx, guty, gutz, + $ guxx, guyy, guzz, guxy, guyz, guzx + CCTK_REAL psi + LOGICAL Tmunu_flag + +C This is a vacuum spacetime with no cosmological constant + Tmunu_flag = .false. + +C write conformal factor + if (Minkowski_conf_wave__direction .eq. 0) then + psi = Minkowski_conf_wave__amplitude * + . sin(2.0d0*Pi/Minkowski_conf_wave__wavelength* x ) + 1.0d0 + else if (Minkowski_conf_wave__direction .eq. 1) then + psi = Minkowski_conf_wave__amplitude * + . sin(2.0d0*Pi/Minkowski_conf_wave__wavelength* y ) + 1.0d0 + else if (Minkowski_conf_wave__direction .eq. 2) then + psi = Minkowski_conf_wave__amplitude * + . sin(2.0d0*Pi/Minkowski_conf_wave__wavelength* z ) + 1.0d0 + end if + +C write metric. + + gdxx = psi**(-4.0d0) + gdyy = gdxx + gdzz = gdxx + + gdxy = 0.0d0 + gdyz = 0.0d0 + gdzx = 0.0d0 + + gdtt = -1.0d0 + gdtx = 0.0d0 + gdty = 0.0d0 + gdtz = 0.0d0 + +C and upper metric. + + guxx = psi**4.0d0 + guyy = guxx + guzz = guxx + + guxy = 0.0d0 + guyz = 0.0d0 + guzx = 0.0d0 + + gutt = -1.0d0 + gutx = 0.0d0 + guty = 0.0d0 + gutz = 0.0d0 + + return + end |