How to overcome highly distorted elements problem in FSI analysis?

malekan.cfd · December 4, 2017, 11:10

Dear All,

I'm involving in a 2-way FSI problem simulation (transient structural + Fluent) which includes big structural deformation. I have used very small time step for transient structural part as well as system coupling part. However, system coupling delivers "highly distorted elements error" every time I run the problem. When I run the transient structutal alone, everything is OK. But, when I run system coupling it return highly distorted elements error for the first iteration, even for very small time steps (1e-6 sec). The loading is a distributed pressure with a magnitude of 4000 Pa. I don't know how to solve this issue!!

Thanks,
Malekan

malekan.cfd · December 7, 2017, 09:17

Problem remains even with a very small loading value. I set the loading to 1 Pa, which is very small, but I still get "highly distorted error". Anyone can give me an advice?

December 4, 2017, 11:10	How to overcome highly distorted elements problem in FSI analysis?	#1
malekan.cfd Member Join Date: Dec 2017 Posts: 34 Rep Power: 8	Dear All, I'm involving in a 2-way FSI problem simulation (transient structural + Fluent) which includes big structural deformation. I have used very small time step for transient structural part as well as system coupling part. However, system coupling delivers "highly distorted elements error" every time I run the problem. When I run the transient structutal alone, everything is OK. But, when I run system coupling it return highly distorted elements error for the first iteration, even for very small time steps (1e-6 sec). The loading is a distributed pressure with a magnitude of 4000 Pa. I don't know how to solve this issue!! Thanks, Malekan Last edited by malekan.cfd; December 7, 2017 at 09:02.

December 7, 2017, 09:17	Problem remains even with a very small loading value	#2
malekan.cfd Member Join Date: Dec 2017 Posts: 34 Rep Power: 8	Problem remains even with a very small loading value. I set the loading to 1 Pa, which is very small, but I still get "highly distorted error". Anyone can give me an advice?

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