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Big changes in pressure interface. interFOAM

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Old   September 29, 2022, 06:50
Default Big changes in pressure interface. interFOAM
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heru
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Hello,

I am solving a cylinder (D=1) submerged in water and Re = 40 000. I have solved this "simple" problem with other code with good results. In openFOAM I get really high values in pressure forces. I guess that the problem is the pressure bubbles that are created by the interface (see attached figs).

Those bubbles lead to a big error. If the cylinder is close to the free surface the error increase since the pressure distribution is changed.

Mesh and time step are OK (same that literature). I have tried different schemes and solvers for pressure and always I get the same error. Also the free surface seems to be OK.

Does anyone know how can I avoid those problems in the free surface?
Attached Images
File Type: png pressure_error.png (36.1 KB, 7 views)
File Type: png free surface.png (10.1 KB, 6 views)
File Type: png velocity.png (43.6 KB, 7 views)
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