Parallel regular hexagons
Function F3D_54(l,h) returns the view factor between parallel regular hexagons.
Inputs:
l = edge of hexagon [m] or [ft]
h = distance between the hexagons [m] or [ft]
Example:
$UnitSystem SI Pa J K m radian
h=0.25 [m]
l=0.5 [m]
F=F3D_54(l,h)
{Solution: F=0.5671}
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.