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

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Old   March 9, 2013, 00:46
Default velocity input which is in the form of a square wave pulse
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raj
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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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Old   March 9, 2013, 07:59
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You need to use UDF to specify a time-dependent boundary condition. Check the Fluent UDF manual or modify the example provided by Amir ((ask) how to create UDF for inlet velocity profile) 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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