F3D_52

Parallel regular triangles

Function f3d_52(l,h) returns the view factor between parallel regular triangles.

Inputs:
l = edge of triangle [m] or [ft]
h = distance between triangles [m] or [ft]

Example:
$UnitSystem SI Pa J K m radian
h=1 [m]
l=0.5 [m]
F=f3d_52(l,h)

{Solution:
F=0.032}

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.