[YaX]

Hi everything, I tried to plot a velocity spectrum via applying a FFT to a reference point. But the characteristic frequency plotted is so small that I am not sure whether I used the method appropriate. Now I tried to applying a FFT for a line to detect the characteristic frequency. Could anyone do me a favour? Thanks~

1. Could anyone tell me how to plot a velocity spectrum by applying a fast fourier trasform to the v-component velocity signals along an horizontal line close to the flat plat surface?

2. Could anyone tell me how to plot the corresponding amplitude against the horizontal line close to the flat plate surface?

[Mehrez]

Hi

This may help you : http://www.cfd-online.com/Forums/par...-3-14-1-a.html

Best regards

Mehrez

Originally Posted by YaX

Hi everything, I tried to plot a velocity spectrum via applying a FFT to a reference point. But the characteristic frequency plotted is so small that I am not sure whether I used the method appropriate. Now I tried to applying a FFT for a line to detect the characteristic frequency. Could anyone do me a favour? Thanks~

1. Could anyone tell me how to plot a velocity spectrum by applying a fast fourier trasform to the v-component velocity signals along an horizontal line close to the flat plat surface?

2. Could anyone tell me how to plot the corresponding amplitude against the horizontal line close to the flat plate surface?