[Users] Tmunu in HydroBase

[Frank Loeffler]

Hi,

So far HydroBase only defines the typical primitive hydro variables (and
more), but it doesn't use them to set Tmunu. This is currently done in
GRHydro. Now, setting Tmunu only requires the primitive variables, so it
could go into HydroBase (with a parameter to turn it off).

One application of this would be that it would be possible to have
parameter files only calculating initial data, but also (correctly)
calculating their constraints, without an active evolution thorn.

On the 'downside' this would introduce a dependency of HydroBase on
TmunuBase, even with a parameter to turn it off. I don't think anyone
would not use HydroBase without TmunuBase in the foreseeable future
though.

What are the opinions about the proposal to move setting Tmunu from
GRHydro to HydroBase?

Frank

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