[ET Trac] [Einstein Toolkit] #1399: add evolution method "stationary" to ADMBase

[Einstein Toolkit]

#1399: add evolution method "stationary" to ADMBase
------------------------------------+---------------------------------------
  Reporter:  rhaas                  |       Owner:                     
      Type:  enhancement            |      Status:  review             
  Priority:  minor                  |   Milestone:                     
 Component:  EinsteinToolkit thorn  |     Version:  development version
Resolution:                         |    Keywords:  ADMBase            
------------------------------------+---------------------------------------

Comment (by rhaas):

 I am fine with a different name for the parameters (and being able to
 schedule after each time step, I had not though of that possibility).

 To give some context: the desire for this methods stems from testing the
 Bondi infall where I found that I either spend most of my time in Exact
 setting up the Schwarzschild metric in every step or have to live with the
 SYNC due to "static" evolution_method causing prolongation and producing
 non-exact metric values in the buffer regions, which I found undesirable
 given that I used an exact background metric.

 Making this a parameter of ADMBase would allow us to use any ID thorn with
 this rather than only Exact which might be a nice feature (maybe for
 something like a long disk simulation around a NS provided by the Lorene
 readers). Resetting the data only after a regrid seems to be only safe for
 "stationary" ie time independent spactimes, hence the choice of keyword. I
 agree that this is confusing when compared to "static" keyword that
 already exists.

 How about "regrid-only" and "frozen-ID" for the two choices "reapply-
 initial-condition-after-grid-structure-changes" and "reapply-initial-
 condition-at-every-time-step" ?

-- 
Ticket URL: <https://trac.einsteintoolkit.org/ticket/1399#comment:3>
Einstein Toolkit <http://einsteintoolkit.org>
The Einstein Toolkit