F3D_50

Two walls of a hexagonal prism once removed from each other

Function f3d_50(l,h) returns the view factor between two walls of a hexagonal prism once removed from each other, as shown in the figure..

Inputs:
l = edge of prism [m] or [ft]
h = height of wall [m] or [ft]

Example:
$UnitSystem SI Pa J K m radian
l=0.1 [m]
h=0.5 [m]
F=f3d_50(l,h)

{Solution:
F=0.1888}

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.