[ET Trac] [Einstein Toolkit] #527: Thorn Dissipation should have 9th order dissipation added

Einstein Toolkit trac-noreply at einsteintoolkit.org
Fri Dec 16 03:51:43 CST 2011


#527: Thorn Dissipation should have 9th order dissipation added
------------------------------------+---------------------------------------
  Reporter:  hinder                 |       Owner:             
      Type:  enhancement            |      Status:  review     
  Priority:  minor                  |   Milestone:             
 Component:  EinsteinToolkit thorn  |     Version:             
Resolution:                         |    Keywords:  Dissipation
------------------------------------+---------------------------------------

Comment (by hinder):

 I have checked the coefficients and they look correct.  The only thing I
 don't understand is the convention for the dissipation strength.  I don't
 get the 1/1024 factor (and by extension, the factors that appear in the
 existing orders).  Do you have a reference for this?  Is it a common
 convention?  I compared with Gustafsson, Kreiss and Oliger
 (http://books.google.de/books?id=1JZ2mSQ-
 O6MC&lpg=PP1&ots=A9c4UBZBjl&dq=gustafsson+kreiss+oliger&pg=PA239&redir_esc=y#v=onepage&q=gustafsson%20kreiss%20oliger&f=false)
 top of p240 and when I compute that operator, I don't get the 1/1024
 factor.

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/527#comment:3>
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