fix the subch_planar diag for cylindrical coords

AMReX-Astro / Castro

Castro (Compressible Astrophysics): An adaptive mesh, astrophysical compressible (radiation-, magneto-) hydrodynamics simulation code for massively parallel CPU and GPU architectures.

http://amrex-astro.github.io/Castro

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fix the subch_planar diag for cylindrical coords #2885

Closed zingale closed 2 months ago

zingale commented 3 months ago

the case of projecting against div{U} was not including area factors

PR summary

PR motivation

PR checklist

[ ] test suite needs to be run on this PR
[ ] this PR will change answers in the test suite to more than roundoff level
[ ] all newly-added functions have docstrings as per the coding conventions
[ ] the CHANGES file has been updated, if appropriate
[ ] if appropriate, this change is described in the docs