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How to draw chart for pressure vs frequncy?

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Old   March 17, 2006, 04:51
Default How to draw chart for pressure vs frequncy?
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ravish
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Hi i want to relate pressure with efficiency in cfx post.I want to draw a chart relating pressure with frequency .I am doing transiet analysis.I have to get pressure at each frequency.In trasnsient analysis post the chart can be drawn only for time on x axis.I want frequncy instead of x frequency.How i can do this.Can anybody tell me that?Thanks in advance.
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Old   March 17, 2006, 05:31
Default Re: How to draw chart for pressure vs frequncy?
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TB
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How do you define frequency? You may create a variable in Post to get what you want.
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Old   March 17, 2006, 09:34
Default Re: How to draw chart for pressure vs frequncy?
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longbow
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A Fourier Transform is needed to transform data in time domain into frequency domain. I believe Post does not have this capability right now. You probably need a separate FFT code to do it.
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Old   March 17, 2006, 10:34
Default Re: How to draw chart for pressure vs frequncy?
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TB
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It should be possible to write a small program for fft analysis and run it under command window.

If you have other software like Matlab, just export your data into a text or csv file.
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