[Commits] [svn:einsteintoolkit] GRHydro/trunk/ (Rev. 337)

[bcmsma at astro.rit.edu]

User: bmundim
Date: 2012/05/17 02:48 PM

Modified:
 /trunk/
  param.ccl

Log:
 Change default value of kap_dc from 1.0 to 10.0 as well as the recommendations.
 
 This is based on the magnetic monopole tests. It indicates that kap_dc = 10.0
 reaches the best balance between damping and advecting. kap_dc = 1.0 advects
 well but damps much slower. kap_dc = 100.0 seems to turn the problem into a
 stiff one and it fails to either damp or advect the divergencies away when
 compared to the other two cases. The recommendation then goes to use values
 between 1.0 and 10.0.

File Changes:

Directory: /trunk/
==================

File [modified]: param.ccl
Delta lines: +2 -2
===================================================================
--- trunk/param.ccl	2012-05-17 19:29:58 UTC (rev 336)
+++ trunk/param.ccl	2012-05-17 19:48:27 UTC (rev 337)
@@ -529,8 +529,8 @@
 
 CCTK_REAL kap_dc "The kap parameter for divergence cleaning"
 {
-  0:* :: "Any non-negative value, but 1/144 to 1 seems preferred"
-} 1.0
+  0:* :: "Any non-negative value, but 1.0 to 10.0 seems preferred"
+} 10.0
 
 KEYWORD psidcspeed "Which speed to set for psidc"
 {