Learning Forum

[antoine.bovesse]

Hi. I'm looking for a way to generate a 2.5D mesh (Thin Volume) with boundary layers in Fluent. It seems that the Watertight workflow only allows to produce 2.5D mesh without boundary layers, or 3D mesh with boundary layers... Is that correct ?!

Do anyone know a way to bypass this problem ? I'm looking for a "not too tricky" solution as I have several meshes to produce and I want it to almost self-update with slight CAD geometry changes.

Thanks.

[peteroznewman]

Use Workbench and under the Components, bring a Mesh component in to use Ansys meshing instead of Fluent meshing. This would allow you to create geometry parameters in SpaceClaim that can cause some slight geometry changes and allow the linked Fluent analysis to automatically update.

[antoine.bovesse]

Thanks for the suggestion. I already worked with Ansys meshing to create 2D meshes and run them with Fluent. However, this method was just a test and now I'd like to use OpenFOAM that requires 2.5D meshes. Tests I made with Ansys meshing were 2D, so I'd need to recreate a 3D project to be able to extrude the mesh I guess.

Another point, I'd like to issue poly mesh that (I assume) would help solver stability (transient multiphase flow with rotating mesh and complex geometry). This function isn't available in Ansys meshing.

Probably I'm missing something, but it's a real shame not beeing able to combine "Thin Volume Mesh" and "Boundary Layers"... It seems so basic and so useful, and I don't get why it wouldn't be technically compatible. I'm able to extrude a face of the 3D + Boundary layers mesh in order to obtain a slice of 2.5D mesh, but labels of the extruded part are lost and 3D parts need to be erased.

I'm not using SpaceClaim nor parametric geometry, but importing Parasolid CAD in DesignModeler. Recognisation of geometric features works pretty well, and I'm able to update missing/buged named selections in minutes. I'd like to stick with that.