All,
I'm having a bit of trouble using HalfHyperShellBoundary. In switching
from a hyper_shell domain to a half_hyper_shell domain for my nonlinear
Stokes code based off Step 32, I get the following error when I use
no_normal_flux for all four boundaries:
ExcMessage("Found a set of normal vectors that are nearly collinear.")
The error does not occur when a boundary condition of u=0 is used on
the two flat boundaries, nor when I use my no_normal_flux boundary
conditions on a hyper_cube. The error can be replicated by changing the
domain and boundary conditions accordingly to the Step 32 (developer
version). Any help in this matter would be greatly appreciated!
Thanks,
Jennifer
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