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Sealed cavity FSI problem

Sealed cavity FSI problem

Sealed cavity FSI problem

(OP)
Hello,

I'm currently working on modeling of a relative pressure sensor which, by definition, is based on a sealed cavity filled by gas under reference pressure(1 atm in this particular case).
What I'd like to figure out is how dimensions of the cavity affect sensor response to pressure, due to gas compression(caused by deflecting membrane) in the cavity.
What I did was using CFX to model the gas(fluid) into cavity and ANSYS Multiphysics for a structural part, followed by solving the problem using MFX/CFX Multifield solver.
It seems to work correctly but it's really time consuming if you want to obtain accurate results.
Finally, what I'd like to ask you is:
Is it possible to use acoustics elements like fluid30/80 to solve the FSI problem directly into ANSYS Multiphysics, does anyone did it? Will these elements can be used for compressible gas modeling? I tried to use it together with contact elements as a fluid-structure interface but I did not obtain any reasonable results.

Thank you in advance for yours replies,

Allshaq

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