How to create 8 layer volume mesh on engine book (CFD)

Torbern_Klason75

Hello,

I have an engine block similar to the one that Altair has in their example of volume mesh

file:///C:/Program%20Files/Altair/2022.1/SimLab/unity/help/SimLab/english/topics/meshing/Mesh_2DCreate_MeshControl_VolumeLayer.htm

This is my engine block. I want to run an example where I got hot gas in one cylinder and then cold in another (and check the heat transfer and stresses due to heat load). So I thought of running with 1. 3-walls-cells, 5-walls-cells and 8-walls-cells between the cylinders (3 cases). This to see grid-resolution

I start with mesh-control and chose the faces on both sides (and we took 8 cells in the example)

Then I got to generate surface mesh and take 2 mm surface mesh

I can already notice the surface mesh only has 2 cells.... hmm....it does not seem to start well here....

 

Then I got to TET and chose 2 mm and chose "replace the mesh in the existing model".

The result is not good. I don't get 8 cells between the cylinders... what do I do wrong?

Community-Pasted-Attachment-1673878843118.png

EngineBlock.x_b

James Lewis

Hi Torbern Klason,

 

I think the problem is when you define volume layers, your selection entities is surface, but you should use solid selection instead.

You could try to switch to solid > define volume layers > mesh.

Best regards,

James