Luciano,

I think GRHydro inherited the atmosphere_mask from Whisky. In Whisky the atmosphere_mask was introduced to allow to set the RHS to zero for points within the atmosphere and to avoid to run Con2Prim in those points.

I do not think there is any advantage in using it and there should be no problem in setting the points to atmosphere locally without a mask (in Spritz, which comes from WhiskyMHD, we removed indeed the usage of masks).

Cheers,

Bruno

Il giorno dom 10 dic 2023 alle ore 23:28 Luciano Combi <combi.luciano@gmail.com> ha scritto:

Hello people.

I've been using (a version of) GRHydro for a while and I was wondering if you know what motivated the use of an atmosphere mask. I understand that this is useful to set atmosphere states between mesh refinement levels, but I'd like to know if you've seen problems before just resetting locally to atmosphere.

Thanks!!

Luc.

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Dr. Luciano Combi
Postdoctoral Researcher
Perimeter Institute for Theoretical Physics
CITA National Fellow (U. of Guelph)
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