Learning Forum

[Marius Carrier]

Hello,

Below you can see the geometry of air I want to simulate with ANSYS Fluent. The most important thing is what happens in the pipe between the red boundaries, therefore I want a finer mesh there. I tried a lot of things, but was unsuccessful. Please tell me how to do that.

Thank you for your help.

Regards,
Marius

 

[NickFL]

That is a pretty straightforward geometry. I should be able to be meshed with multizone method. Then on the faces of the connecting tube you would place a smaller element size and a smaller growth rate. Be sure to include an inflation layer near the walls to capture the boundary layer gradients. Or you could subdivide it into several bodies and use a multi-body part to force a 1:1 mesh between the bodies. In the middle body, you then specify a smaller body size. Again make sure that you have the inflation mesh on all the walls.

[Marius Carrier]

I tried spliting the objekt into 3 parts and to just use local mesh, but I don't know what to do, so that it doesn't register the edges of the parts as walls. So that it is possible to create a flow form the beginning to the end

[Rob]

Share Topology is probably what you're after. That and the tutorials (click on Help). You may also want to refine the mesh around the inlet and outlet region of the tube to resolve the flow. Meshing in CFD is as much about capturing the geometry (CAD shape) as it is the flow field.