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