I predict that is a large impact of laminar vs turbulent flow, which is not really an intuitive thing to reason about. But it could be that a more closed but we

I predict that is a large impact of laminar vs turbulent flow, which is not really an intuitive thing to reason about. But it could be that a more closed but weirdly shaped grill is better than a more open configuration? I'm not an expert, just have some experience with microfluidics, back in the day.