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Mass flowrate convergence error

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Old   March 17, 2011, 15:08
Default Mass flowrate convergence error
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Hi, what I'm simulating is a regenerative pump using multiple rotating reference frames. Its a simple pump casing and rotating impeller system. I've specified the outlet/inlet of the pump as pressure outlet/inlet, and started off with a 4 psi pressure rise through the pump. I'm using the realizable k epsilon model, with non-equilibrium wall conditions. I have the solver set as second order, SIMPLE and PRESTO! I ran the simulation , with a monitor at the outlet for mass flowrate. I received a "solution is converged" message, but my mass flow at the outlet has not levelled out, in fact it just continues to increase steadily as the calculation goes on. Any ideas on how to achieve convergence on the mass flow, could a poor quality mesh be causing issues maybe?
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Old   March 18, 2011, 03:14
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Solve Monitors Residual...
disable all check convergence
And let iterate untill your massflow converges
In memory of my friend Hervé: CFD engineer & freerider
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