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The simulation does not match the results in the article |
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August 20, 2024, 04:12 |
The simulation does not match the results in the article
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Join Date: May 2024
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Hi, everyone!
I'm new member in OpenFOAM, currently simulating a stationary incompressible flow in a Tesla valve. Repeating the geometry (valve+2 cylinders) from the experimental article(https://www.mdpi.com/2072-666X/13/8/1180), I simulate the movement of the liquid and compare the pressure obtained with the results. But they don't add up. There was a hypothesis that it was necessary to grind the grid, but this does not help: I got to the difference of 2% between the simulation results, it seems to me that there is no point in grinding further. The results are still 2-3 times less than expected. I tried to take the articles that these scientists took as a basis, but still the results are much less. I multiply the resulting pressure by the density of the liquid, because I use incompressible solver. I wrote the boundary conditions below, but I don't see any errors in them: Velocity: Code:
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 (-1.25 0 0); } outlet { type zeroGradient; } wall { type noSlip; } front { type noSlip; } back { type noSlip; } } // ************************************************************************* Code:
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; } wall { type zeroGradient; } front { type zeroGradient; } back { type zeroGradient; } } |
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