GRHydro: implemented H viscosity for HLLE solver to eliminate the carbuncle instability. Tested with shocktube and TOV. Not yet tested for problem where carbuncles occur.

From: Christian Reisswig <reisswig@scriwalker.(none)>

git-svn-id: http://svn.einsteintoolkit.org/cactus/EinsteinEvolve/GRHydro/trunk@491 c83d129a-5a75-4d5a-9c4d-ed3a5855bf45

1 files changed, 4 insertions, 0 deletions

diff --git a/param.ccl b/param.ccl
index 7074529..44f6b22 100644
--- a/param.ccl
+++ b/param.ccl
@@ -310,6 +310,10 @@ keyword numerical_viscosity "How to compute the numerical viscosity"
   "normal"	:: "Normal numerical viscosity"
 } "fast"
 
+boolean apply_H_viscosity "H viscosity is useful to fix the carbuncle instability seen at strong shocks"
+{
+} no
+
 keyword bound "Which boundary condition to use - FIXME"
 {
   "flat"	:: "Zero order extrapolation"