Boundary Issues in the Cell-Centered Compressible FHD

[amrex-fhd]

Boundary Issues in the Cell-Centered Compressible FHD

[isriva]

@jbbel I have started this branch to check for the errors associated with boundary conditions in cell-centered compressible FHD: https://github.com/AMReX-FHD/FHDeX/tree/fix_compres_center

[isriva]

The error appears to be at the high boundary (in all directions). Here is an example of the error: local density variance in an equilibrium simulation.

[jbbel]

do you view noslip at left boundary as ok? also do we see same behavior with adiabatic

[isriva]

The behavior is the same with adiabatic. I think the no-slip is ok on the left (the difference could be in the noise -- but I will check closely).

[jbbel]

i believe I have identified the issue and fixed the problem. at least for noslip isothermal walls in z direction things seem to be correct

[isriva]

The issue above seems to be fixed, but the variance for density (and also energy) seem incorrect for noslip -- looks like it is correct for slip -- see below ...