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Forum: Main CFD Forum

December 8, 2012, 12:58

Replies: 16

FLUENT, flow past a circular cylinder

Views: 3,981

Posted By cfdnewbie

Just load the file in Matlab and do the FFT there...

Just load the file in Matlab and do the FFT there (or on octave). Or just plot it over time and determine the frequency by eye. Should be very easy to do, and exact enough to check your result.

Forum: Main CFD Forum

December 8, 2012, 09:46

Replies: 16

FLUENT, flow past a circular cylinder

Views: 3,981

Posted By cfdnewbie

record the force component over time, sample a...

record the force component over time, sample a sufficiently high number of cycles and the do the fft to find the dominant frequency! what is still unclear?

Forum: Main CFD Forum

December 8, 2012, 06:18

Replies: 16

FLUENT, flow past a circular cylinder

Views: 3,981

Posted By cfdnewbie

do a temporal FFT of the vertical / orthogonal to...

do a temporal FFT of the vertical / orthogonal to inflow and cylinder axis force. that will give you the Strouhal number

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