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-   -   Please Help- Modeling unsteady velocity (http://www.cfd-online.com/Forums/fluent/38585-please-help-modeling-unsteady-velocity.html)

Vidya Raja November 11, 2005 17:11

Please Help- Modeling unsteady velocity
 
Hi all, I want to simulate an unsteady (pulsatile) velocity in Fluent. I have approximated the waveform as sine function of the same frequency, so that it's easier to work with. The equation that I have is

Q = A + B* sin(2*pi*f*t)

I have the values of the constants and the frequency, f. How do I send this to Fluent? Do I have to write a code in C to generate this waveform? Or just define the waveform? And how do I do this? I read the Help menu, but could not figure out how to do it. Can someone help me out? Any help will be ppreciated.

Thanks a lot.

Vidya

Anindya November 11, 2005 19:22

Re: Please Help- Modeling unsteady velocity
 
There is an example in the Fluent Manual using a similar case as your. Yes-- you need to type a short UDF using C to achieve this.

Anindya



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