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continuity residual oscilation

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Old   May 22, 2003, 05:02
Default continuity residual oscilation
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I have a problem of convergence: the residual curve of the continuity equation remains oscillating around 0.001 without stabilizing.

I'M using the Diphasique VOF model , I changed several parameters (discretization scheme, decreasing the time step and the factors of under relaxation ) in accordance with the instructions in Fluent Documentation but the problem persists...

Knowing that all the other equations (of movement and turbulence) converge very well (until 0.0000001) except that of continuity

Does any one have any idea to improve this convergence.

Otherwise, is convergence criterion of 0002 or 0.003 is enough in such case (VOF, diphasique , jet modelisation).

Thank you in advance

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