I like that, Oh-No! Boundary layer conditions are just what I had in mind when I did the integral analysis of the temperature gradient while varying the small distance between layers.
Seriously, it is puzzling that a thin layer of air improves the performance of a thin layer of polyethylene.
I did wonder just how big to make the pleats... then I found out that since the tubes like to lay down, the size of the pleat is not critical at all! InsulTubes are what they are... a 1/2" pleat makes a baffle of about the same height as a 3/8" or a 1/4" pleat.
Yes, but between two separate IX layers in one UQ. They are just supports, or spacers.
- MacEntyre, fum State
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