FSI is not working for soft materials

mpulokmpulok Member

Hello,
I am working with FSI simulation of a rotor blade where transient structural and fluent solved with system coupling. My simulation is working fine when I consider the blade made of steel or aluminum. But, if I consider fiber epoxy composite, then the system coupling failed to update. The error is" The value of UX at node 18556 is 1.061435247E+11. It is greater than the current limit of 1000000". Sometimes I got another error, "negative cell volume detected"
N.B. I have turned the large deflection on in transient structural solver control. And the simulation worked with fiber epoxy composite for lower angle of attack. That means, it is not working for high-speed flow, higher angle of attack and soft material.

Please help!

 

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