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boundary setup in Acoustic Module - Linear elastic or Impendance

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Dear All,

I have a question about the boundary condition setup in my simple 2D symmetric acoustic module.

I would like to simulate a transient pressure distribution in a small glass dish filled with water, particularly the pressure at the bottom glass-water interface .

Pressure source locates in the medium giving the pressure toward to the bottom.

I set the water&air interface (top) as soft boundary. The wall of the dish (side) as hard wall condition.

My question is what about bottom side? Should I set the bottom side as a linear elastic domain to consider the fluid-structure interaction effect on the pressure at the interface? Do I need set the impedance of the glass at bottom or this is already considered in the elastic model?
I am thinking the reflection/transmission of the pressure wave the interface, which one of the boundary setup will include this consideration?

Do I need to consider about the glass-air effect on the other side which is out of my interest?

Thank you very much for advises.

Best
Xu

0 Replies Last Post 27 feb 2013, 16:52 GMT-5
COMSOL Moderator

Hello Xu Meng

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