Robin BC for EB

[starwar9527]

is Robin BC supported in AMRex for EB? I can not find such support in the development branch. If it is not supported yet, is there any development plan for that? Thanks!

[WeiqunZhang]

No, Robin BC is not supported for EB and there is no plan for it. It's not clear what a good discretization is for Robin BC on EB. If you have any ideas to share, let us know.

[rmrsk]

Is it for elliptic solves? Then Robin BCs are Adphi/dn + Bphi = C, so the dphi/dn required by finite volume discretizations is available from dphi/dn = (C-B*phi)/A. Reconstruction of phi using least squares with the nearest neighbors tends to work