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Non convergence error + SNES div tol unlimited #1049

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Merged
RemDelaporteMathurin merged 2 commits into from
Nov 21, 2025
Merged

Non convergence error + SNES div tol unlimited #1049

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5be3f00
added error message
RemDelaporteMathurin Nov 19, 2025
6e69c97
added unlimited snes div tol
RemDelaporteMathurin Nov 19, 2025
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5 changes: 4 additions & 1 deletion src/festim/problem.py
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Original file line number Diff line number Diff line change
Expand Up @@ -181,6 +181,7 @@ def create_solver(self):
"snes_atol": self.settings.atol,
"snes_rtol": self.settings.rtol,
"snes_max_it": self.settings.max_iterations,
"snes_divergence_tolerance": "PETSC_UNLIMITED",
"ksp_type": "preonly",
"pc_type": "lu",
"pc_factor_mat_solver_type": linear_solver,
Expand Down Expand Up @@ -251,7 +252,9 @@ def iterate(self):
elif Version(dolfinx.__version__) > Version("0.9.0"):
_ = self.solver.solve()
converged_reason = self.solver.solver.getConvergedReason()
assert converged_reason > 0
assert converged_reason > 0, (
f"Non-linear solver did not converge. Reason code: {converged_reason}. \n See https://petsc.org/release/manualpages/SNES/SNESConvergedReason/ for more information."
)
nb_its = self.solver.solver.getIterationNumber()

# post processing
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