velocity input which is in the form of a square wave pulse

raj · March 9, 2013, 00:46

Hello Friends
Iam doing a simulation of active control of instability with secondary fuel injection.
Can anyone help me with how to give a time varying velocity input , which varies as a square wave form.

blackmask · March 9, 2013, 07:59

You need to use UDF to specify a time-dependent boundary condition. Check the Fluent UDF manual or modify the example provided by Amir (http://www.cfd-online.com/Forums/flu...y-profile.html) according to your purpose. You might need to use CURRENT_TIME or N_TIME macro to get the current time in seconds or time step.

March 9, 2013, 00:46	velocity input which is in the form of a square wave pulse	#1
raj New Member rajkumar Join Date: Oct 2012 Posts: 3 Rep Power: 14	Hello Friends Iam doing a simulation of active control of instability with secondary fuel injection. Can anyone help me with how to give a time varying velocity input , which varies as a square wave form.

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March 9, 2013, 07:59		#2
blackmask Senior Member Join Date: Aug 2011 Posts: 421 Blog Entries: 1 Rep Power: 22	You need to use UDF to specify a time-dependent boundary condition. Check the Fluent UDF manual or modify the example provided by Amir (http://www.cfd-online.com/Forums/flu...y-profile.html) according to your purpose. You might need to use CURRENT_TIME or N_TIME macro to get the current time in seconds or time step.