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Seriously sick pre-conditioner.

Posted 23 déc. 2023, 03:15 UTC−5 Computational Fluid Dynamics (CFD), Optimization, Studies & Solvers Version 6.2 1 Reply

兆炜 何
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While performing 3D fluid topology optimization, an error occurred: "Solution not found. At velocity u, pressure p. Severe pathological preconditioner. The returned solution does not converge. Not all parameter steps were returned." How should this error's be solved? What does the severe pathological preconditioner stand for?

1 Reply Last Post 2 janv. 2024, 04:26 UTC−5
Kristian Ejlebjærg Jensen COMSOL Employee

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Posted: 11 months ago 2 janv. 2024, 04:26 UTC−5
Updated: 11 months ago 2 janv. 2024, 07:02 UTC−5

Hi

Does the problem happen immediately for the first iteration? It could be that you are using a Fully Coupled solver, when a Segregated approach would be better.

Best regards

Kristian. E. Jensen

Technical Product Manager, Optimization

Hi Does the problem happen immediately for the first iteration? It could be that you are using a Fully Coupled solver, when a Segregated approach would be better. Best regards Kristian. E. Jensen Technical Product Manager, Optimization

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