This shows how a complex internal model can be mesh. Most of the water jacket is meshed with TETS and PRISMS but there are some very sm drillings in the model. TETS would not be efficient in these regions and would result in a large mesh. This is just 1 section of the V10 engine so remember the full model is ten times larger. These drillings are mesh with HEX cells and connected to the exiting mesh.