Hi peteroznewman,

I tried to add the Multizone Method and I got Tet elements, so I deleted it.

Yes, I also think that Inflation on all walls would be better, but just the central body has around 420k elements and it takes around 22h to simulate (using OpenFOAM). If I add Inflation on every solid I obtain a mesh of 624k elements (it will take almost 2 days to simulate). If I only add Inflation on the central body I get a total of 474k (faster simulation). Nonetheless, I will perform trials with both meshes to see the differences.

Thank you very much, that's what I wanted


PS: Just for curiosity, this is what simulations look like, air entering through the horizontal inlet and water through the vertical one: