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Modelling Torricelli cylindre with buoyantSimpleFoam - problem with p_rgh

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Old   November 22, 2014, 17:17
Default Modelling Torricelli cylindre with buoyantSimpleFoam - problem with p_rgh
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Dear Foamers,

I would like to modelize a case like in the Torricelli's cylinder ( with one inlet at the top and three outlets on the right side.

I'm using buoyantSimpleFoam, removing turbulence and setting the temperature constant, so that I only have the effect of the gravity influencing my flow.

I'm using atmospheric pressure for the BC of my three outlets for p_rgh and a small velocity is imposed at the inlet. p field is calculated from p_rgh. Pressure fields p_rgh and p are correctly computed, but since openFoam compute U using p_rgh = p - rho*g*h, I don't see the effect of the gravity on the flow (in fact, it is the same as using icoFoam, velocities at the three outlets are the same). I would like to use p instead of p_rgh to have my flow with different velocities at the outlet.

The questions are: How can I make openFoam using my static pressure p? Should I use an other solver for my problem?

Here are the results obtained for velocity field U, p and p_rgh

Thanks in advance


Last edited by jocoheur; November 23, 2014 at 14:32. Reason: add pictures
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buoyantsimplefoam, gravity driven, openfoam, p_rgh, torricelli

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