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How to access cell data and how to add impedance outlet BC

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Old   July 2, 2014, 02:08
Question How to add impedance outlet BC
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丁笑天
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xiaotian.ding@gmail.com is on a distinguished road
Hi everyone!

I am a fresh foamer and my recent work really needs help;

The question is how to implement an impedance/resistance outlet Boundary condition. This boundary condition can be described by a simple equation:

P=F*R;

where P is the outlet pressure, F the volume flux at the outlet, R is the resistance. (Taken from the electronic circuit equation U=I*R); If I get the outflow volume flux of a specific outlet, I can calculate the outlet-pressure and then apply it to this outlet.

The main problem is that I don't know how to modify the original fixed-value pressure-outlet as desired, can anybody help?

Last edited by xiaotian.ding@gmail.com; July 6, 2014 at 21:19.
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cell data, openfoam udf, user-defined bc

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