Introduce a new kind of dissipation operators. Kreiss-Oliger type dissipation

operator suitably modified near the boundary. Since the dissipation operator
in the interior uses a stencil that is one point wider than the derivative
operator, an additional check on the number of ghostzones in multi processor
runs have been added. Only implemented for the 8-4 and optimized 6-5
operators.


git-svn-id: https://svn.cct.lsu.edu/repos/numrel/LSUThorns/SummationByParts/trunk@53 f69c4107-0314-4c4f-9ad4-17e986b73f4a

1 files changed, 6 insertions, 0 deletions

diff --git a/param.ccl b/param.ccl
index 4e3fda5..ff72a06 100644
--- a/param.ccl
+++ b/param.ccl
@@ -27,6 +27,12 @@ BOOLEAN scale_with_h "Should we scale the dissipation with the grid spacing h"
 {
 } "no"
 
+KEYWORD dissipation_type "Type of dissipation operator" STEERABLE=always
+{
+  "Mattson-Svard-Nordstrom" :: "Mattson, Svaerd and Nordstroem type"
+  "Kreiss-Oliger" :: "Kreiss-Oliger modified near the boundaries"
+} "Mattson-Svard-Nordstrom"
+
 REAL epsdis "Dissipation strength" STEERABLE=always
 {
   *:* :: "Values typical between 0 and 1"