Using CFD to predict noise generation
 

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

Re: Using CFD to predict noise generation
 

Let me refer you to a previous thread :

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

Re: Using CFD to predict noise generation
 

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.

Re: Using CFD to predict noise generation
 

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

Thank you,

Alan Glenn

Re: Using CFD to predict noise generation
 

Thank you for this information. It should be helpful.

Thank you,

Alan Glenn

Re: Using CFD to predict noise generation
 

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