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Problems with circular shapes in FSI simulations

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Old   September 15, 2009, 10:36
Default Problems with circular shapes in FSI simulations
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I am working on a impact model of the human head. Skull, Cerebrospinal fluid (CSF) and the human brain.
First I made a very simple model without the brain. Just a simple square filled with the CSF. There is a force applied (starts at 3e-5 seconds ends at 9e-5 seconds ) at the front of the square which represents the impact.
BUT when I model the brain in this square (see it as a circle in a square, around the square is the CSF) the simulation stops always at the timestep when the force will come up.

I tried all different kind of meshes and it didn't help. Maybe the problem is the density of the brain and the fluid, because they are almost simular??

end time = 3e-3
time step = 3e-5

Hope someone can help me.

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