I'll not quibble with the rationale,
the fit is close enough for our purposes
(and likely more consistent than the data you're comparing it to !)
I'm putting: together a bunch of data for
ThermoChill which should be more than sufficient to extract flow and dissipation parameters for oval tube/folded fin rads
right now I'm in Excel hell with a compressed axis title box (not autosizing)
any Excel gods out there please help