Time-dependent simulation Shell (fluid interaction)

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Hi,

I an trying to use the fluid interaction module with a shell. The stationary study converge, but when i want to use the time-dependent step, it does not converge...

My system is like this : a tube with an inlet ( 0.1[m/s] * sin(t[1/s]) ) and an outlet ( pressure = 0 ). I fix the face at the inlet, to make the shell module to converge. I implement the materials for each module, and make a time dependent form 0 to 10, step 0.5.

I do not understand why the time dependent study does not converge... Can someone have a solution ?

Thanks a lot


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