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April 1, 2015, 08:45 |
Increasing continuity errors
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#1 |
New Member
Luuk Buijs
Join Date: Mar 2015
Posts: 19
Rep Power: 11 |
Dear Foamers,
I'm currently running a case with buoyantPimpleFoam involving variable density in a closed geometry. I'm getting gradually increasing continuity errors in my simulations, and introducing larger density differences makes the problem even worse. So far this hasn't led to my simulations crashing, but I expect this to happen in the near future (as I will be working with even larger density differences and longer runs). Is there anything I can do with regards to tolerances or relaxation factors? My fvSolution is as follows: Code:
solvers { "rho.*" { solver PCG; preconditioner DIC; tolerance 0; relTol 0; } p_rgh { solver PCG; preconditioner DIC; tolerance 1e-5; relTol 0.001; } p_rghFinal { $p_rgh; relTol 0; } "(U|h|e|k|epsilon|R)" { solver PBiCG; preconditioner DILU; tolerance 1e-6; relTol 0.1; } "(U|h|e|k|epsilon|R)Final" { $U; relTol 0; } } PIMPLE { momentumPredictor yes; nOuterCorrectors 1; nCorrectors 2; nNonOrthogonalCorrectors 0; } Luuk |
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