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

Let me refer you to a previous thread :

http://www.cfd-online.com/Forum/main...cgi?read=19789

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.

Thank you for the information. It should be very helpful.

Thank you,

Alan Glenn

Thank you for this information. It should be helpful.

Thank you,

Alan Glenn

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