I am trying to generate a structured mesh for one of my models. It's a hexagonal unit cell - 6 finned tube surrounded by fluid as well as fluid flowing through it's cylindrical center. See below the cross sectional view.
The mesh that I have generated is still pretty coarse and I wish to refine it.
However, when I try to increase the number of nodes along the edges, it messes up the mesh in the center of the tube.
And I also get the following warning.
I'd appreciate any suggestions that you guys would provide.