How to set a udf like this? -- CFD Online Discussion Forums

March 29, 2011, 22:50	How to set a udf like this?	#1
aleisia Member Join Date: Mar 2011 Posts: 38 Rep Power: 15	Hi everyone! I have a contaminated air flow coming in a pipe, concentration not known, must be computed from conservation laws, and in the pipe, I put a sink, it is required that after the flow goes through the sink, the concentration must be 20% of the incoming flow (or 10%, or any specified percentage). Could you please tell me how to realize this in udf? Or can I set the BCs in another way around udf? Thank you so much! Any word would be greatly appreciated!!!

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