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- - **Low pressure result in low velocity region for RNG-ke?**
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Low pressure result in low velocity region for RNG-ke?Hi,
I have ran a SimpleFOAM RAS -RNG- K-e model of a ball vale at a small % opening position, as an axi symmetric model. At the moment I have using PCG with a preconditioner of GAMG for the pressure calculations in fv schemes: p { solver PCG; preconditioner { preconditioner GAMG; tolerance 1e-7; relTol 0.1; smoother GaussSeidel; nPreSweeps 0; nPostSweeps 2; cacheAgglomeration on; agglomerator faceAreaPair; nCellsInCoarsestLevel 10; mergeLevels 1; }; tolerance 1e-06; relTol 0.01; maxIter 100; and solver PBiCG; preconditioner DILU; tolerance 1e-05; relTol 0.1; for K U and epsilon My relaxation factors are: relaxationFactors { p 0.7; U 0.2; k 0.5; epsilon 0.5; My result has an extremely low pressure region in area of low velocity. I feel as though this is not correct and am not sure what to do to optimize the model and get a better result. I have tried adjusting delta T and write time in controldict. I can get pressure residuals to converge but still have the same result Any Ideas? |

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