Unbounded domain solution of NSE

General Discussion
1

I need to solve flow past obstacles on the unbounded domain at Freefem. Is it possible? How can I write?

Thank you

2

I think a reasonable approximation is that you use a sufficiently large truncated domain for your calculation. If you need a semi-infinite domain, you could use a coordinate transformation to map a semi-infinite domain to a finite one which can be handled by FreeFem.

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