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Using CFD to predict noise generation

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Old   March 7, 2002, 17:32
Default Using CFD to predict noise generation
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Alan H. Glenn
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I am beginning to use CFD for analyses of flow through valves, some of which have tortuous pathes. In addition to the normal information such as flow patterns, pressure drops, etc., I am interested in the noise generated by the flow including the frequency spectrum. Are there any ways to get this information from a CFD analysis? Are there any programs better than others for getting this information?

Thank you,

Alan H. Glenn
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Old   March 8, 2002, 04:56
Default Re: Using CFD to predict noise generation
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Smith
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Let me refer you to a previous thread :

http://www.cfd-online.com/Forum/main...cgi?read=19789
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Old   March 8, 2002, 11:12
Default Re: Using CFD to predict noise generation
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Fred_PSU
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If you collected enough time-accurate data (pressure, density, velocity) on the solid surface or on a closed surface surrounding whatever surface you're simulating, you can write a little post-processing code that uses the so-called Ffowcs Williams - Hawkings equation to compute at any observer location the sound history. Just type Ffowcs Williams - Hawkings on Google, and you will find much more info.
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Old   March 8, 2002, 12:09
Default Re: Using CFD to predict noise generation
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Alan H. Glenn
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Thank you for the information. It should be very helpful.

Thank you,

Alan Glenn
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Old   March 8, 2002, 12:12
Default Re: Using CFD to predict noise generation
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Alan H. Glenn
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Thank you for this information. It should be helpful.

Thank you,

Alan Glenn
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Old   March 9, 2002, 17:23
Default Re: Using CFD to predict noise generation
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Dimitri Nicolopoulos
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You should check out RADIOSS-CFD. Our website www.mcube.fr gives numerous examples of Computational Aero-Acoustic (CAA) applications under the M-Explicit section.

Regards,

Dimitri
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