EntropyToInvGammaPred not integrated in Hydrokick

From: Leonard Romano <leonard.romano_at_tum.de>
Date: Mon, 19 Apr 2021 12:55:05 +0200

Dear Gadget list members,

I noticed that when one uses PRESSURE_ENTROPY_SPH the variables Entropy and EntropyPred
are integrated during the Hydrokick in the function sim::hydro_force(...) but never used.
Instead the pressure is computed from EntropyToInvGammaPred. This alone wouldn't be confusing,
but at the same time in the function simparticles::drift_particle(...) these two variables
are integrated too, and then EntropyToInvGammaPred is updated in order to be consistent with them,
so I am wondering if either I don't understand this formulation of SPH well enough or instead
there is an update of EntropyToInvGammaPred missing in sim::hydro_force(...).

Thank you very much,

Leonard Romano, B.Sc.(レオナルド・ロマノ)
Physics Department
Technical University of Munich (TUM), Germany
Theoretical Astrophysics Group
Department of Earth and Space Science
Graduate School of Science, Osaka University, Japan
he / him / his
Received on 2021-04-19 12:55:25

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