GRHydro: decouple Bvec(flux_direction) from other two for divclean

since it and psidc form a 2d subsystem of the characteristic system. See
eg. Mignonoe et al. arXiv:1001.2832v2 section 3.1.


git-svn-id: http://svn.einsteintoolkit.org/cactus/EinsteinEvolve/GRHydro/trunk@335 c83d129a-5a75-4d5a-9c4d-ed3a5855bf45

1 files changed, 4 insertions, 0 deletions

diff --git a/param.ccl b/param.ccl
index f5ad996..d022a93 100644
--- a/param.ccl
+++ b/param.ccl
@@ -549,6 +549,10 @@ CCTK_REAL setcharmin "Minimum characteristic speed for psidc if psidcspeed is se
   -1:0 :: "Any value smaller than speed of light - sign should be negative"
 } -1.0
 
+BOOLEAN decouple_normal_Bfield "when using divergence cleaning properly decouple Bx,psidc subsystem"
+{
+} yes
+
 boolean track_divB "Track the magnetic field constraint violations"
 {
 } "no"