Structure Mesh for heat transfer problem of battery
 

Hi there,

I have a model of 28 cells 18650 li-ion battery here. It's just a cylinder like this.
Surround of this is air domain (cubic shape).

I meet the problem with mesh.

I found the structure meshing with high quality, but I don't know how exactly to create that. About cylinder, maybe I'll split 1 cylinder into 5 part. It's ok.
But about the domain, I don't know.

Thanks for reading !

https://drive.google.com/file/d/1Cug...ew?usp=sharing

https://drive.google.com/file/d/1wWL...ew?usp=sharing