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Parallel, directly opposed right triangles



Function f3d_44(c,b,theta) returns the view factor between two parallel right triangles that are directly opposed from one another.

Inputs:
c = distance between triangles [m] or [ft]
b = base of triangles [m] or [ft]
theta = one of the acute angles of the triangles [degree] or [radian]

Example: 
$UnitSystem SI Pa J K m radian
c=0.1 [m]
b=0.1 [m]
theta=pi/4 [rad]
F=f3d_44(c,b,theta)

{Solution: 
F=0.1186}

Reference: 
McAdam, D.W.; Khatry, A.K.; and Iqbal, M., 1971, "Configuration Factors for Greenhouses," Am. Soc. Ag. Engineers, vol. 14, no. 6, pp. 1068-1092, Nov.-Dec.