[ET Trac] [Einstein Toolkit] #773: McLachlan dissipation should be disabled by default

[Einstein Toolkit]

#773: McLachlan dissipation should be disabled by default
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  Reporter:  hinder       |       Owner:     
      Type:  enhancement  |      Status:  new
  Priority:  major        |   Milestone:     
 Component:  Other        |     Version:     
Resolution:               |    Keywords:     
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Comment (by eschnett):

 What about modifying the way in which McLachlan iterates over variables?
 One calculation per variable should be easy to realise:
 {{{
 dissCalcs =
 Table[
 {
   Name -> BSSN <> "_Dissipation_" <> ToString[var /. {Tensor[n_,__] ->
 n}],
   Schedule -> {"IN " <> BSSN <> "_evolCalcGroup " <>
                "AFTER (" <> BSSN <> "_RHS1 " <> BSSN <> "_RHS2)"},
   ConditionalOnKeyword -> {"apply_dissipation", "always"},
   Where -> InteriorNoSync,
   Shorthands -> {epsdiss[ua]},
   Equations ->
   {
     epsdiss[ua] -> EpsDiss,
     dot[var]    -> dot[var] + epsdiss[ux] PDdiss[var,lx]
   }
 },
   {var, {phi, gt[la,lb], Xt[ui], trK, At[la,lb], alpha, A, beta[ua],
 B[ua]}}
 ];
 }}}

 Otherwise, this is okay to change.

 Do you then also want to change the default epsdiss value to be the same
 as for thorn Dissipation?

-- 
Ticket URL: <https://trac.einsteintoolkit.org/ticket/773#comment:1>
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