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Infinitely long opposed parallel plates



Function f2d_1(h, w) returns the view factor between two infinitely long, directly opposed parallel plates of the same finite width.

Inputs:
h is the distance between the plates [m or ft]
w is the width of the plate [m or ft]

Example: 
$UnitSystem SI K Pa J deg
h=1 [m] 
w=2 [m]
F=f2d_1(h, w)

{Solution: 
F=0.618}


Reference:  Siegel and Howell, Thermal radiation heat transfer, 4th edition, p.843.

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