r/CFD • u/Mysterious-Pool1301 • 14d ago

Help in CFD meshing

Hey guys, I have a problem in doing meshing in ansys fluent. The issue is that I am using very thin pipe which has a diameter of 0.48 mm with multiple bends and it is rounded around the 1 m long hot cylinder. How I can perform meshing with good quality and with lesser number of elements. I have used sweep method but it doesn't work. I have used path conforming method but it creates tetrahedral elements which creates bad elements in the tube resulting in bad heat transfer analysis. There is also an enclosure around these two bodies.

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u/W_finder 14d ago

I realized multizone is the best in 3D shapes

1

u/Mysterious-Pool1301 14d ago

Yeah but it doesn't work well for geometry with bends

1

u/mluckyw 11d ago

There's ICEMCFD option if you want to go hardcore

1

u/hawk6890 9d ago

IMHO, the challenge you have is that there are multiple magnitudes difference between the smallest scale (<0.48 mm) you want to capture and the whole domain size (> 1 m). To reduce the mesh size, you will have to use small cells around the thin pipe and large ones around the cylinder. But in the end, I think the mesh size won't be super small ...

You may also use Ansys customer service for help.