Adding fixed timestep option

Will update documentation.tex later today.


git-svn-id: http://svn.cactuscode.org/arrangements/CactusBase/Time/trunk@27 5633253d-7678-4964-a54d-f87795f8ee59

1 files changed, 19 insertions, 10 deletions

diff --git a/param.ccl b/param.ccl
index 317be03..79ce823 100644
--- a/param.ccl
+++ b/param.ccl
@@ -3,18 +3,9 @@
 
 restricted:
 
-REAL dtfac "The standard timestep condition dt = dtfac*max(delta_space)"
-{
- 0:* :: "Probably only makes sense to be bigger than zero"
-} 0.5 
-
-REAL courant_fac "The courant timestep condition dt = courant_fac*max(delta_space)/speed/sqrt(dim)"
-{
- 0:* :: "Probably only makes sense to be bigger than zero"
-} 0.9
-
 KEYWORD courant_method "Method for calculating timestep"
 {
+ "none"     :: "Use given timestep"
  "standard" :: "Courant condition at BASEGRID"
  "courant"  :: "Courant condition at PRESTEP (using wavespeed)"
  "courant_time" :: "Courant condition at PRESTEP (using min time)"
@@ -24,6 +15,24 @@ BOOLEAN courant_outonly "Only output courant timestep?"
 {
 } "no"
 
+
+private:
+
+REAL timestep "Absolute value for timestep"
+{
+ *:* :: "Could be anything"
+} 0.0
+
+REAL dtfac "The standard timestep condition dt = dtfac*max(delta_space)"
+{
+ 0:* :: "Probably only makes sense to be bigger than zero"
+} 0.5 
+
+REAL courant_fac "The courant timestep condition dt = courant_fac*max(delta_space)/speed/sqrt(dim)"
+{
+ 0:* :: "Probably only makes sense to be bigger than zero"
+} 0.9
+
 INT outcourant_every "How often to output courant timestep"
 {
  0:* :: "Zero means no output"