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FW-H acoustic permeable surface in Fluent

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Old   July 31, 2013, 08:15
Default FW-H acoustic permeable surface in Fluent
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I'm simulating an unsteady, low Mach number (M<0.1) flow. I also want to measure the generated sound.
I know that to find the sound caused by vortices I must enclose them by a "permeable surface" and define it as the sound source.
This also means that I must use compressible simulations with the ideal gas law.

The question remaining is whether I must reduce the time step to achieve a Currant number less then 1, even if the flow frequency is very small?

Since I'm capturing the boundary layer, this will cause a time step 3 orders of magnitude smaller then the flow time scale.
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Old   March 24, 2014, 14:20
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Hi! I'm trying to simulate jet noise in subsonic nozzles and I came across your post here.I would like to know how I can introduce an acoustic permeable surface in order to enclose the noise sources along my computational domain.I appreciate it if you could give me some guidance about it.
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Old   April 7, 2014, 07:53
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Quote:
Originally Posted by HPUR
Hi! I'm trying to simulate jet noise in subsonic nozzles and I came across your post here.I would like to know how I can introduce an acoustic permeable surface in order to enclose the noise sources along my computational domain.I appreciate it if you could give me some guidance about it.
Create a new named selection in your geometry/mesh that encloses your model.
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