CVS info   : $Header$

Cactus Code Thorn Dissipation
Thorn Author(s)     : Erik Schnetter <schnetter@aei.mpg.de>
Thorn Maintainer(s) : Erik Schnetter <schnetter@aei.mpg.de>
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Purpose of the thorn:

Add fourth order Kreiss-Oliger dissipation to the right hand side of
evolution equations.  This thorn works only for time evolutions that
use MoL.  I thank Scott Hawley who wrote a very similar thorn
HawleyThorns/Dissipation for evolutions that do not use MoL; this
thorn here is modelled after his.

For a description of the artificial dissipation, see H. Kreiss and
J. Oliger, "Methods for the Approximate Solution of Time Dependent
Problems", vol. 10 of Global Atmospheric Research Programme (GARP):
GARP Publication Series (GARP Publication, 1973).