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Acoustic resonance in a closed tube

Posted Oct 15, 2014, 5:18 p.m. EDT Acoustics & Vibrations Version 4.4 2 Replies

Edvin Golestanyan
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Dear All,
I am trying to simulate acoustic resonance in a closed end tube.
I have attached my model, the incident sound pressure should be 3pa, and the resonance frequency should be around 198 hz.

How should I model the boundary conditions?

Thank you,


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2 Replies Last Post May 13, 2015, 1:42 p.m. EDT
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Hello Edvin Golestanyan

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冠 王
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Posted: 10 years ago May 13, 2015, 12:58 a.m. EDT
your model maybe have some error when I open it
there is just a tube and a cylinder filled in it.
And you did not assign the material Parameters about the filler in the tube

I think you can give more information that may have more help
your model maybe have some error when I open it there is just a tube and a cylinder filled in it. And you did not assign the material Parameters about the filler in the tube I think you can give more information that may have more help
Jeff Hiller COMSOL Employee

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Posted: 10 years ago May 13, 2015, 1:42 p.m. EDT
Also, your geometry steps are unnecessarily complicated: you subtract cylinder1 and then you add it right back, what's the point? Just draw the two cylinders and you're done. You can read on geometry creation in the Reference Guide, Chapter 7.
Jeff
Also, your geometry steps are unnecessarily complicated: you subtract cylinder1 and then you add it right back, what's the point? Just draw the two cylinders and you're done. You can read on geometry creation in the Reference Guide, Chapter 7. Jeff

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