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-   -   How to measure vortex shedding frequency? and how can I plot FFT? (http://www.cfd-online.com/Forums/fluent/71292-how-measure-vortex-shedding-frequency-how-can-i-plot-fft.html)

arash_7444 December 23, 2009 10:36

How to measure vortex shedding frequency? and how can I plot FFT?
 
Dear all,

I am new in fluent, and I have two question
-how can i find vortex shedding freq. for cylinder in 2D in fluent?

-How can I plot fft in fluent? because it want input file? where can i find this input file in fluent?

Thank a lot in advance

amirmohebbi May 31, 2011 05:18

fft frequency
 
dear all
i have aproblem with fluent
isolve a flow field in a jet and i can not plot frequency versus position in jet
if anyone also have this problem and solve it
please help me in this situation


what is input file in FFT?

amirmohebbi June 7, 2011 06:39

Quote:

Originally Posted by arash_7444 (Post 240820)
Dear all,

I am new in fluent, and I have two question
-how can i find vortex shedding freq. for cylinder in 2D in fluent?

-How can I plot fft in fluent? because it want input file? where can i find this input file in fluent?

Thank a lot in advance

hi
you can go to solve/ monitor/surface
and create points that you want frequency of them
select the variable that you want monitored ots history by time
then run fluent again
its dat file create
then load this file in FFT for input file


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