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-   -   velocity input which is in the form of a square wave pulse (https://www.cfd-online.com/Forums/fluent/114324-velocity-input-form-square-wave-pulse.html)

raj March 9, 2013 00:46

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


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