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Showing results 1 to 6 of 6 Search took 0.00 seconds. Search: Posts Made By: FMDenaro

Forum: Main CFD Forum May 4, 2022, 13:43

Replies: 13 Help with Pressure Correction Matrix - Singular - Ill-conditioned Matrix. Views: 1,106 Posted By FMDenaro In inflow you prescribe the Dirichlet bc for the... In inflow you prescribe the Dirichlet bc for the velocity but the pressure equation requires to prescribe bcs on the whole frontier of the domain. In your case you have non-homogenoeus Neumann BC to...

Forum: Main CFD Forum November 2, 2021, 04:12

Replies: 13 Help with Pressure Correction Matrix - Singular - Ill-conditioned Matrix. Views: 1,106 Posted By FMDenaro Fixing a value is a way to get one solution... Fixing a value is a way to get one solution because you fixed the constant value. But that does not mean you have the correct solution. Boundary conditions are required for the mathematical...

Forum: Main CFD Forum November 1, 2021, 08:40

Replies: 13 Help with Pressure Correction Matrix - Singular - Ill-conditioned Matrix. Views: 1,106 Posted By FMDenaro https://www.cfd-online.com/Forums/main/87885-poiss... https://www.cfd-online.com/Forums/main/87885-poisson-equation-neumann-bcs.html

Forum: Main CFD Forum November 1, 2021, 08:29

Replies: 13 Help with Pressure Correction Matrix - Singular - Ill-conditioned Matrix. Views: 1,106 Posted By FMDenaro have you already searched in the forum for... have you already searched in the forum for similar post?

Forum: Main CFD Forum November 1, 2021, 08:18

Replies: 13 Help with Pressure Correction Matrix - Singular - Ill-conditioned Matrix. Views: 1,106 Posted By FMDenaro How do you prescribe the BCs for the pressure? How do you prescribe the BCs for the pressure?

Forum: Main CFD Forum November 1, 2021, 08:04

Replies: 13 Help with Pressure Correction Matrix - Singular - Ill-conditioned Matrix. Views: 1,106 Posted By FMDenaro Let me generalize the issue. The fact that the... Let me generalize the issue. The fact that the pressure matrix is singular is a consequence of the Neumann BCs and expresses the fact that the pressure solution is determined up to a function of...

Showing results 1 to 6 of 6

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