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Asymmetric matrix solving on parallel incompressible computation |
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March 7, 2023, 06:17
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Asymmetric matrix solving on parallel incompressible computation
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Member
Song Young Ik
Join Date: Apr 2022
Location: South Korea
Posts: 58
Rep Power: 4  |
Hello, I am trying several matrix solvers on incompressible steady-state flow, and currently using GAMG
I found this thread saying that for parallel computation, PBiCGstab with DILU as preconditioner performs best for pressure How to choose solvers However, when I try to implement by myself, according to log, error occurs because my matrix is symmetric while DILU is for asymmetric. I guess this error occurs because decomposePar seperates mesh into several parts and each processor runs n x n matrix where n is # of cell, while what thread wanted is decomposed N x N matrix into many asymmetric matrix calculation. How can I change my matrix solver work so? Or is it best to just replace it with DIC preconditioner? |
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| dilu, matrix, pbicg |
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