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Stability problems with high sorce term
Posted Nov 29, 2009, 2:19 p.m. EST 0 Replies
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I try to resolve a geothermal case with high source terms and the comsol's solutors have instability problems. I have two type of source terms: one is in the energy equation and the other is in the NS equations to modeling poruos mediums. I try to resolve the problem with the artificial coefficients and other stability technique that are in the stabilization menu, but the solution not converges. Then I try to resolve the problem step by step with "restart" incrementing every step the sorce terms. But there is always a convergence error. The point is fixed in a point because the domain is close and I think that the mesh is fine near the gradients.
Please help me. Thanks very much and excuse me if my english is uncorrect.
Hello Antonio Marconcini
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