ft08-navier-stokes-cylinder, but I got a Triangle

Question

I am unable to get the correct picture when running this FEniCS example code. When I output the results into a *.pvd file and open it in paraview, I have flow around a triangle instead of a circle. I really don't know what the problem is, does anyone have advice? I also do not know how to view the results that are exported into *.xdmf files.

Answer 1

Yes, increase the number of segments when creating the circle. I assume you are talking about this example from the tutorial. In that case, you can use something like this:

cylinder = Circle(Point(0.2, 0.2), 0.05, segments=32)

Consider reporting this at the issue tracker for the FEniCS tutorial.

Comments

That worked beautifully, Thank you very much!
Give tell me what resource I can use to read about fenics commands and the options like, this segment option in the circle command?
I want good material while I keep trying to learn.

Thanks again!

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The documentation for mshr is unfortunately not available online AFAIK but you can for example use pydoc mshr and pydoc mshr.Circle.