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volume flow rate for outlet boundry condition and dfine udf for it

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Old   December 24, 2016, 02:52
Red face volume flow rate for outlet boundry condition and dfine udf for it
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ramin
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hello experts.I Want to simulate blood flow in artery. I have 2 big problems.

1- my boundry co is volume flow rate in outlets and pressure in inlet but fluent doesn't have any type of mass flow or velocity in outlet. now I see a option''mass flow rate'' in type of ''pressure outlet'' boundry co but I'm not sure about using it.should I use this case for my outlet bc?if it is true what value of pressure I put in pressure outlet?

2-my outlet bc is time depending and I need to write udf for it but I don't know abut writing udf for mass flow in outlets . fluent help has a simple udf. for example : what shold I do if I want define Q=sin(t) as a udf for my bc?

please help me.I become confused.

best regards.
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