[cfdstar]

Hi,

I wanted to get the axisymmetric flow field in a 3D cylindrical domain. I do not want to do a 2D axisymmetric calculation. Is there any way to do that using Fluent?
I tried to fix the tangential velocities to zero but I faced divergence problems.

Any help is highly appreciated.

Cheers,

[DEd]

In the text user interface (TUI) under: mesh/modify-zones/make-periodic

You can set up a rotational periodic BC. Just select the two faces in your segment

[cfdstar]

Originally Posted by DEd

In the text user interface (TUI) under: mesh/modify-zones/make-periodic

You can set up a rotational periodic BC. Just select the two faces in your segment

Thanks for your reply. In that case, I can only simulate a portion of a full 3D case. The purpose is to calculate axial and radial velocities but not tangential velocities. Imagine a perfectly cylindrical domain, I want to obtain a perfectly axisymmetric solution for the cylinder in its perfect form.

[DEd]

Yes, the purpose of 2D axisymmetric or only modelling a sector of the full circle is to save computational cells. I don't understand why you want to go full 3D if not needed.

Maybe you are interested in having the solution in full 3D view but then it is easy to transform the result (from 2D axi or 3D sector w periodic BCs to "full 3D") in postprocessing. I haven't tried it in Fluents crappy postprocessor but in CFD-Post it's easy.