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January 27, 2013, 16:25 |
pisoFoam - unstable pressure residual
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#1 |
Member
Anonymous
Join Date: Jan 2012
Location: Canada
Posts: 65
Rep Power: 14 |
I am looking to get some help figuring out why my pressure residual keeps rising. I am conducting an LES simulation; the mesh is pretty good quality (pure hexahedral), and mesh and boundary conditions are stable in FLUENT. But I need to implement this in OpenFOAM. Could someone take a look at my dictionaries and see if I am missing something? BTW I solved a steady-state using simpleFoam, which was fine, converged nicely.
I keep the Co number less than 0,5; even going as low as 0.05, but to no avail. U "/*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 1.7.1 | | \\ / A nd | Web: www.OpenFOAM.com | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ FoamFile { version 2.0; format ascii; class volVectorField; object U; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // dimensions [0 1 -1 0 0 0 0]; internalField uniform (0 0 0); boundaryField { INLET { type fixedValue; value uniform (0.32 0 0); } OUTLET { type inletOutlet; inletValue uniform (0 0 0); value uniform (0 0 0); } WALLS { type fixedValue; value uniform (0 0 0); } LEAFLETSURFACE1 { type fixedValue; value uniform (0 0 0); } LEAFLETSURFACE2 { type fixedValue; value uniform (0 0 0); } BACKWALL { type fixedValue; value uniform (0 0 0); } } " p "/*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 1.7.1 | | \\ / A nd | Web: www.OpenFOAM.com | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ FoamFile { version 2.0; format ascii; class volScalarField; object p; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // dimensions [0 2 -2 0 0 0 0]; internalField uniform 0; boundaryField { INLET { type zeroGradient; } OUTLET { type fixedValue; value uniform 0; } WALLS { type zeroGradient; } BACKWALL { type zeroGradient; } LEAFLETSURFACE1 { type zeroGradient; } LEAFLETSURFACE2 { type zeroGradient; } }" Really appreciate the help everyone. Cheers |
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