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Parallel regular octagons
Function f3d_55(l,h) returns the view factor between parallel regular octagons.
Inputs:
l = edge of octagon [m] or [ft]
h = distance between the octagons [m] or [ft]
Example:
$UnitSystem SI Pa J K m radian
h=0.25 [m]
l=0.5 [m]
F=f3d_55(l,h)
{Solution: F=0.6634}
Reference:
Feingold, A., 1966, "Radiant-interchange configuration factors between various selected plane surfaces," Proc. Roy. Soc. London, ser. A, vol. 292, no. 1428, pp. 51-60.