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Search: Posts Made By: chb
Forum: OpenFOAM April 9, 2010, 05:37
Replies: 5
Views: 7,440
Posted By chb
Since fvc::div(R) is an explicit term, it might...

Since fvc::div(R) is an explicit term, it might cause numerical instabilities when your time step is too large. Maybe reducing the time step to get a cell CFL number less than 1 helps. CFL = U_ref *...
Forum: OpenFOAM April 8, 2010, 08:34
Replies: 5
Views: 7,440
Posted By chb
Could it be that the signs of your div() and...

Could it be that the signs of your div() and laplacian() term are wrong?

Maybe

fvm::ddt(U) + fvm:div(phi,U) - fvc::div(R) - fvm::laplacian(nu,U)

solves your problem.
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