UDF for unsteady velocity inlet -- CFD Online Discussion Forums

April 11, 2015, 03:16	UDF for unsteady velocity inlet	#1
chem engineer Member Lida Join Date: Apr 2015 Posts: 39 Rep Power: 11	Hello everyone, I'm new and amateur in the world of CFD and fluent and I should use a udf for a velocity inlet in a cylindrical pipe.the velocity inlet follow a step function as is described: for (t=time) t<10 v=6.5*(1-r/3.5)^(1/7) t>10 v=0 I don't know how to write a step function. does anyone can help me? Thank you in advance Akash Siddique likes this.

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