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author | eschnett <eschnett@e296648e-0e4f-0410-bd07-d597d9acff87> | 2010-11-24 01:57:07 +0000 |
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committer | eschnett <eschnett@e296648e-0e4f-0410-bd07-d597d9acff87> | 2010-11-24 01:57:07 +0000 |
commit | 776418a82ced3c2ed3da4b9db71a57c97295e4db (patch) | |
tree | 8f80c6b48ce22efe2a8edbe9d09e4470f11d1ecf /param.ccl | |
parent | a1f06bc52427181b79e5f4cfb06a88e9ee615149 (diff) |
This thorn EinsteinInitial/Exact uses finite differencing to calculate
the extrinsic curvature. It uses currently only a 2nd order stencil.
This patch implements 4th order finite differencing, which reduces the
error significantly.
git-svn-id: http://svn.einsteintoolkit.org/cactus/EinsteinInitialData/Exact/trunk@266 e296648e-0e4f-0410-bd07-d597d9acff87
Diffstat (limited to 'param.ccl')
-rw-r--r-- | param.ccl | 17 |
1 files changed, 17 insertions, 0 deletions
@@ -103,6 +103,23 @@ KEYWORD overwrite_boundary "Overwrite g and K on the boundary" } "no" ################################################################################ +##### parameters for calculating the extrinsic curvature ####################### +################################################################################ + +private: + +INT exact_order "finite differencing order" +{ +2 :: "2" +4 :: "4" +} 2 + +REAL exact_eps "finite differencing stencil size (in terms of the grid spacing)" +{ +(0.0:* :: "Positive please" +} 1.0e-6 + +################################################################################ ##### parameters for boosting any non-stress-energy-tensor model ############### ################################################################################ |