[bieshuxuhe]

Hi , I am a beginner in OpenFOAM.
I want to get the mesh in the following picture with only one hex(or other cellModel) in blockMesh.
Could you help me? The mesh is in the "picture(mesh).jpg".
Thank you!

[cutter]

Hi,

the picture shows six cells - could you explain a little further?

Basically you can start with a single block (see tutorial) and fix the positions of the corner points. You need to define two pairs of coincident vertices (same coordinates) so your single hex block becomes degenerated into a prism.

Afterwards you may want to adapt the discretization of the block as desired.

cutter

[bieshuxuhe]

Originally Posted by cutter

Hi,

the picture shows six cells - could you explain a little further?

Basically you can start with a single block (see tutorial) and fix the positions of the corner points. You need to define two pairs of coincident vertices (same coordinates) so your single hex block becomes degenerated into a prism.

Afterwards you may want to adapt the discretization of the block as desired.

cutter

Thank you for your reply!
It is a 2D mesh,so there is a layer of cell in the z direction.
I know how to get a hex to become a prism, as user guide has told us. But I could only get a prism mesh that I don't desire to get. The mesh not desired is in the "picture(not desired).jpg".
How could I get a mesh which is described in the "picture(mesh).jpg"?

[cutter]

This is not possible with a single hex block because blockMesh discretizes the hex blocks along topological parallel edges.