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October 29, 2021, 12:11 |
Post processing convergence plot decaying
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#1 |
New Member
Join Date: Oct 2021
Posts: 1
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Hi all,
posting for the first time. I am doing a simple cavity simulation using open foam. I have managed to get the simulation to run, and I've used a probe to read pressure and velocity data at a specific point. When I analyse the data, the U and P values always seem to decay. Ive ran this numerous times using different meshes and time controls but results seem to be the same. Any help would be greatly appreciated. Control setup Code:
/*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 5 | | \\ / A nd | Web: www.OpenFOAM.org | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ FoamFile { version 2.0; format ascii; class dictionary; location "system"; object controlDict; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // application icoFoam; startFrom startTime; startTime 0; stopAt endTime; endTime 100.0; deltaT 0.005; writeControl timeStep; writeInterval 200; purgeWrite 0; writeFormat ascii; writePrecision 6; writeCompression off; timeFormat general; timePrecision 6; runTimeModifiable true; functions { #includeFunc probes } // ************************************************************************* // Mesh setup Code:
/*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 5 | | \\ / A nd | Web: www.OpenFOAM.org | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ FoamFile { version 2.0; format ascii; class dictionary; object blockMeshDict; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // convertToMeters 1; vertices ( (0 0 0) (1 0 0) (1 1 0) (0 1 0) (0 0 0.1) (1 0 0.1) (1 1 0.1) (0 1 0.1) ); blocks ( hex (0 1 2 3 4 5 6 7) (200 200 1) simpleGrading (1 1 1) ); edges ( ); boundary ( movingWall { type wall; faces ( (3 7 6 2) ); } fixedWalls { type wall; faces ( (0 4 7 3) (2 6 5 1) (1 5 4 0) ); } frontAndBack { type empty; faces ( (0 3 2 1) (4 5 6 7) ); } ); mergePatchPairs ( ); // ************************************************************************* // Heres a link to the results and setup used: https://docs.google.com/presentation...it?usp=sharing Last edited by muhmos; October 29, 2021 at 12:15. Reason: Added code into post |
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Tags |
convergence failure, openfoam, post procesing |
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