[Jun_Milan]

Hi all,

I have meshed a 2D airfoil on ICEM CFD. My mesh (2D) contains 140 000 elements. Now I would like to extrude it in order to have a 3D mesh with 20 layers in the z direction. After this, I'm planning to do 3D simulations on my extruded mesh with Fluent.

Can anyone give help me please? Do you have any step by step tutorial that do the job or show me how ?

N.B: - I'm new to ICEM CFD.
- I have looked in ANSYS tutorial and they were suggesting to use the extrude mesh command. But when I export the extruded mesh to Fluent, I have ''face or thread '' errors. I think this is du to part definition, but I do not know exactly how to resolve it.
- There is on youtube a famous video that shows how to extrude a 2D mesh to 3D that is applied on a cylinder. When I apply the same technique on my airfoil, I have some problems mostly related to associations I say but I'm not sure.


Thank you again for your help,
Jun_Milan

[rolloblues]

Hi Jun
My tips to generate the 3D mesh are:

-first generate the 3D geometry (including the material point) and define each part
-extrude the 2D mesh
-associate the mesh to the geometry
(edit mesh - > repair mesh - > associate mesh to geometry )

Hope this helps

[kad]

In general the extruding process is pretty straight forward and there are different approaches possible. I usually do not modify the geometry when extruding a mesh. Actually it isn't even neccessay to have a geometry loaded while extruding. My approach is as follows.

Start with 2D mesh (1). Select the shells you want to extrude and specify the extrusion method. The new volume part is e.g. "FLUID" (2). Names for side and top parts don't matter as these will be assigned later manually, so give them some random name like "TMP". (3) shows the extruded mesh and (4) is with associations.

Now associations are made manually. Click RMB on parts in display tree, choose "Create part", pick a name like "SIDES" and select the corresponding shell elements. If you want to add the shells to an existing part then RMB on part in displaytree and "ADD".

A big help is the select mesh elements panel (5). Use the floodfill selection up to feature angle. Mark one shell element and then use the panel button or hotkey "l" on keyboard.