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Negative volume and element distortion

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Old   March 4, 2014, 14:52
Default Negative volume and element distortion
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hi all,
im using ansys workbench to work on a 2-way FSI problem: fluid flow over reed valve.
I am running into negative cell volume problem(fluent) and extensive element distortion problems(transient structure) leading to the system coupling to end before completion.

solid is hyperelastic material
fluid is ideal gas
velocity inlet
pressure outlet
time step 5e-05
end time 0.075 sec

substep used.
P.S.I'm willing pay for someone to resolve this problem. Especially great if you happen to be staying in singapore.
Attached Images
File Type: jpg setupworkbench.jpg (51.3 KB, 1 views)
File Type: jpg geometry setup.jpg (41.0 KB, 0 views)
File Type: jpg inlet and valve.jpg (40.5 KB, 1 views)
File Type: jpg fluent mesh.jpg (71.1 KB, 1 views)
File Type: jpg transient structure meshing.jpg (55.2 KB, 1 views)
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