(UDF) Sinusoidal inlet velocity in Fluent

star · December 17, 2013, 02:32

Dear friends. I want to use a UDF in which inlet velocity changes sinusoidally from 1m/s to 2m/s in first 0 to 0.1 sec and then decreases back to 1m/s in the next 0.1 to 0.2 sec. And this repetition goes on with time like this. I think it looks simple. Please guide me or send me udf if anyone has. Thanks in advance.

Best Regards
Tariq

oayeni1 · December 19, 2013, 17:23

You can use the DEFINE_PROFILE macros to define the inlet velocity. Within the macro, make the F_PROFILE variable a sinusoidal function of the fluent variable, CURRENT_TIME which stores the current flow time from fluent. Remember to hook this UDF once you start up fluent.

Cheers.

December 17, 2013, 02:32	(UDF) Sinusoidal inlet velocity in Fluent	#1
star Member Harry Join Date: May 2013 Posts: 68 Rep Power: 6	Dear friends. I want to use a UDF in which inlet velocity changes sinusoidally from 1m/s to 2m/s in first 0 to 0.1 sec and then decreases back to 1m/s in the next 0.1 to 0.2 sec. And this repetition goes on with time like this. I think it looks simple. Please guide me or send me udf if anyone has. Thanks in advance. Best Regards Tariq

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December 19, 2013, 17:23		#2
oayeni1 New Member Dapo Join Date: Jul 2012 Posts: 2 Rep Power: 0	You can use the DEFINE_PROFILE macros to define the inlet velocity. Within the macro, make the F_PROFILE variable a sinusoidal function of the fluent variable, CURRENT_TIME which stores the current flow time from fluent. Remember to hook this UDF once you start up fluent. Cheers.