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How to define mass flow rate using UDF?

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Old   December 16, 2004, 02:55
Default How to define mass flow rate using UDF?
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I have triied to define mass flow rate using UDF for unsteady calculation but unsuccessfully. The mass flow rate is a linear function of the time t (e.g. : q=a*t+b)at inlet boundary. Could someone tell me how to do this?

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