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Right triangles that are perpendicular and share a common base. Triangle 1 has half the base length as triangle 2
Function f3d_42(W,L,D) returns the view factor between two perpendicular right triangles that share a common base. The base of triangle 1 is half that of triangle two.
Inputs:
W = height of triangle 2 [m] or [ft]
L = twice the height of triangle 1 [m] or [ft]
D = length of base of triangle 2 (twice the base of triangle 1) [m] or [ft]
Example:
$UnitSystem SI Pa J K m
D=0.1 [m]
L=0.05 [m]
W=0.2 [m]
F=f3d_42(W,L,D)
{Solution:
F=0.4312}
Reference:
Sauer, H.J., "Configuration factors for radiant energy interchange with triangular areas," ASHRAE Transactions, Vol. 80, Part 2, (1974).