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Periodic Interface (Ideal Gas) Massflow Control

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Old   July 25, 2011, 11:43
Default Periodic Interface (Ideal Gas) Massflow Control
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I want to to a translational periodicity and use the material ideal gas.
My results using Air at 25 are converging and I can set a specific mass flow at the interface.
But I am not allowed to set a mass flow rate at an interface using air ideal gas. If I set it to none, my mass flow is asymptotically going to zero .... almost zero after 50 iteration ...... do I have to set a momentum source? Or whats the solution?

Thanks in advance!
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