/diy/ - Do It Yourself

>>2751303
>higher flow resistance also raises heat transfer coefficients
I did not know that, guess it makes sense that the surface contact is more pronounced. But wouldn't it be better to increase flow resistance by increasing the surface area of the contact area, rather than by having the air flow go in a wiggly pattern? Because the former should increase the heat transfer even more.

My desire would be to make a cross-flow heat exchanger since that looks like an easy enough topology to make highly dense, and would be relatively easy to make with aluminium foil squares between 3D printed layers. And a bunch of adhesive to stick pipes to the four ends. Pic related