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

arash_7444 · December 23, 2009, 09:36

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

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

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

December 23, 2009, 09:36	How to measure vortex shedding frequency? and how can I plot FFT?	#1
arash_7444 Member Arash Join Date: Dec 2009 Location: Denmark Posts: 37 Rep Power: 16	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

May 31, 2011, 05:18	fft frequency	#2
amirmohebbi New Member amir Join Date: Jan 2011 Posts: 10 Rep Power: 15	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?