3D Acoustics with symmetry plane

a_habib · January 29, 2016, 11:49

Hello Foamers,
I'm planning to use the symmetry plane boundary condition to minimise my domain, let's say it's a 3D domain with a cylinder and the symmetry plane cuts this cylinder in the mid length of its span.
Now in curle setting. do I need to make any special setting?
If I simulated the sound from this half length object, is there any scientific way to take the other half into account, i.e some correction factors.
thanks for your help in advance.
A - Habib

skeptik · January 29, 2016, 14:39

If you use libAcoustics Curle, you can set lRef = 0.5, so whole aerodymanic force will be doubled and then p' will be calculated.

a_habib · January 29, 2016, 15:21

Thanks Ilya,
Actually this is what came to my mind, but I needed an expert opinion.

skeptik · January 30, 2016, 04:29

Quote:

Originally Posted by a_habib

Thanks Ilya,
Actually this is what came to my mind, but I needed an expert opinion.

Look into the Curle.C code

a_habib · January 30, 2016, 08:14

I did Ilya, before posting my thread, that's why I said what I said.

mortezahdr · August 9, 2021, 21:10

Quote:

Originally Posted by skeptik

Look into the Curle.C code

Is it the same for FWH? I could not find it in the code.

January 29, 2016, 11:49	3D Acoustics with symmetry plane	#1
a_habib Member Ahmad Habib Join Date: Nov 2014 Location: Aleppo, Syria Posts: 53 Rep Power: 12	Hello Foamers, I'm planning to use the symmetry plane boundary condition to minimise my domain, let's say it's a 3D domain with a cylinder and the symmetry plane cuts this cylinder in the mid length of its span. Now in curle setting. do I need to make any special setting? If I simulated the sound from this half length object, is there any scientific way to take the other half into account, i.e some correction factors. thanks for your help in advance. A - Habib

January 29, 2016, 14:39		#2
skeptik Member Ilya Join Date: Dec 2011 Location: Russia Posts: 97 Blog Entries: 41 Rep Power: 15	If you use libAcoustics Curle, you can set lRef = 0.5, so whole aerodymanic force will be doubled and then p' will be calculated. a_habib and guanjiang.chen like this. __________________ practice makes perfect

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January 29, 2016, 15:21		#3
a_habib Member Ahmad Habib Join Date: Nov 2014 Location: Aleppo, Syria Posts: 53 Rep Power: 12	Thanks Ilya, Actually this is what came to my mind, but I needed an expert opinion.

January 30, 2016, 08:14		#5
a_habib Member Ahmad Habib Join Date: Nov 2014 Location: Aleppo, Syria Posts: 53 Rep Power: 12	I did Ilya, before posting my thread, that's why I said what I said.