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FSI for compressible enclosed volume, cfx error

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Old   March 25, 2021, 23:47
Default FSI for compressible enclosed volume, cfx error
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ZRS
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Hi guys,
New to CFX and sorry for dumb questions. Iím trying to setup a FSI 2 way model which is a rectangular block with enclosed cavities filled with fluid. The mesh update exchange is defined with solid-fluid interface in Ansys mechanical and system coupled defined faces in CFX-pre. However, cfx is failing with exceptions exit code 2.
Anything I could possibly change for the scenario?

FYI: Mechanical model is validated. This simulation is setup by imitating Tutorial: Oscillating Plate with Two-Way Fluid-Structure Interaction using CFX, Mechanical, and System Coupling--------https://www.youtube.com/watch?v=FN2MfWBv3Sk
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Old   March 26, 2021, 01:05
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Can you explain what you are doing a bit better?

Is the orange block inside the outer block? Is the outer block filled with fluid? What fluid? Does the blocks move rigidly? Or do they deform? What physics drives the deformation or rigid body motion?

You mention the fluid is compressible. Why is that significant? What is compressing it?
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Old   March 26, 2021, 08:59
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The orange block is inside the grey outer block and the grey block is structural body being compressed from +z face and fixed at -z face. Orange block is fluid, air, and compressible. Structural body is free to deform too. Stress response is supposed to transfer from structural body to fluid and both will deform together.

This a unit cell of a complex geometry that uses air as damp material (like a bubble sheet).

Thanks for the reply and sorry for any confusion.
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