Dear all,
I am doing a refinement study for two-phase flow in porous media. The first five levels of refinement succeed and I get reasonable results. On level six I get an error (see [1]). I also attached the trace.
I tried the suggestion with –snes_converged_reason and –ksp_converged_reason, but this gives no output. Since the error seems to originate from the projection on the linear output space, I removed these parts. Then I get [2].
Do you have an idea what I am doing wrong? Why does the formulation seem to be correct for coarse discretizations, but gives NAN for finer ones?
Thank you!
Henrik
[1]
firedrake.exceptions.
ConvergenceError: Nonlinear solve failed to converge after 0 nonlinear iterations. Reason:
Inner linear solve failed to converge after 0 iterations with reason: unknown reason (petsc4py enum incomplete?), try with -snes_convered_reason and -ksp_converged_reason
%s""" % (snes.getIterationNumber(), msg))
[2]
Nonlinear solve did not converge due to DIVERGED_FNORM_NAN iterations 0
--
Dipl.-Math. Henrik Büsing
Institute for Applied Geophysics and Geothermal Energy
E.ON Energy Research Center
RWTH Aachen University
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