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Acoustic absorption coefficient

Posted 2023/04/15 9:12 GMT-4 Acoustics & Vibrations, Modeling Workflow, Physics Interfaces Version 6.1 2 Replies

Nagendra s
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Hi community,

I want to calculate acoustice absorption for porous strucuture, that too without using the JCA or any emperical / semi empirical models.

Is it possible to use Thermoviscous acoustic model to do the same?

Please share your valulable suggestions.

Advance Thanks

Regrads Nagendra

2 Replies Last Post 2023/04/16 15:08 GMT-4
Mark Cops COMSOL Employee

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Posted: 1 year ago 2023/04/15 22:28 GMT-4

Hi Nagendra, If the absorption from your porous structure is due to thermoviscous boundary layer effects, then yes this can be modeled with the Thermoviscous Acoustics interface. This is a good assumption in the limit of rigid framed porous materials. This would require a detailed mesh of the porous material. You may also find the following reference helpful: https://asa.scitation.org/doi/abs/10.1121/10.0001959 .

Hi Nagendra, If the absorption from your porous structure is due to thermoviscous boundary layer effects, then yes this can be modeled with the Thermoviscous Acoustics interface. This is a good assumption in the limit of rigid framed porous materials. This would require a detailed mesh of the porous material. You may also find the following reference helpful: https://asa.scitation.org/doi/abs/10.1121/10.0001959 .
Nagendra s
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Posted: 1 year ago 2023/04/16 15:08 GMT-4

Thank you so much.

It looks intresting will work on it.

Thanks once again

Thank you so much. It looks intresting will work on it. Thanks once again

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