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Very low values of Pressure in a Difusser using OpenFOAM |
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March 28, 2018, 07:40 |
Very low values of Pressure in a Difusser using OpenFOAM
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New Member
Bota Amdrei
Join Date: May 2015
Posts: 13
Rep Power: 11 |
Hello everyone,
I am trying to simulate the flow through a diffuser using OpenFOAM. After the simulation is complete, paraview shows the values of pressure being 1e-38. I do not have a clue why this is happening because with the exact fvSchemes and fvSolutions it did not show this. The fvSolutions and Schemes are displayed below: fvSolutions: solvers { Phi { solver GAMG; smoother DIC; tolerance 1e-06; relTol 0.1; } p { solver GAMG; tolerance 1e-06; relTol 0.1; smoother GaussSeidel; $Phi } "(U|k|epsilon|omega|f|v2)" { solver smoothSolver; smoother symGaussSeidel; // solver GAMG; // smoother GaussSeidel; tolerance 1e-06; relTol 0.1; } } SIMPLE { nNonOrthogonalCorrectors 0; consistent yes; residualControl { p 1e-6; U 1e-6; "(k|epsilon|omega|f|v2)" 1e-6; } } relaxationFactors { equations { "U.*" 0.95; // 0.9 is more stable but 0.95 more convergent "p.*" 0.95; // 0.9 is more stable but 0.95 more convergent "k.*" 0.95; // 0.9 is more stable but 0.95 more convergent "epsilon.*" 0.95; // 0.9 is more stable but 0.95 more convergent ".*" 0.95; // 0.9 is more stable but 0.95 more convergent } } potentialFlow { nNonOrthogonalCorrectors 3; } // ************************************************** *********************** // fvSchemes ddtSchemes { default steadyState; } gradSchemes { default Gauss linear; } divSchemes { default none; div(phi,U) Gauss linearUpwind grad(U); div(phi,k) Gauss linearUpwind grad(k); div(phi,epsilon) Gauss linearUpwind grad(epsilon); div(phi,omega) Gauss linearUpwind grad(omega); div(phi,v2) Gauss upwind; div((nuEff*dev2(T(grad(U))))) Gauss linear; div(nonlinearStress) Gauss linear; } laplacianSchemes { default Gauss linear corrected; } interpolationSchemes { default linear; } snGradSchemes { default corrected; } wallDist { method meshWave; } Kind regards, Andrei |
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