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Open Channel Flow - problems with boundaries conditions

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Old   December 7, 2021, 15:54
Question Open Channel Flow - problems with boundaries conditions
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I'm running an open channel flow simulation in Ansys Fluent and my idea is to try different combinations of inlet and outlet boundaries conditions. However, when I try the combinations

inlet: mass-flow-inlet --- outlet: outflow
inlet: pressure-inlet --- outlet: outflow

The program shows an error message at the second interaction: (sorry, I couldn't upload the image here)

Also, as you can see in the image (behind the error message), the flow's behavior is really weird

I can't find what is happening...

When I use other combinations, the simulation works just fine.

The simulation is an open channel flow with water and the viscous model is the standard k-epsilon (I also tried k-omega) model.

Thank You
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ansys, boundaries condition, fluent, k-epsilon k-omega, open channel flow

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