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Right triangles that are perpendicular with bases that share a common line and touch
Function f3d_43(W,L,D) returns the view factor between two perpendicular right triangles whose bases share a common length. The bases of each triangle are the same and they must touch as shown.
Inputs:
W = twice the height of triangle 2 [m] or [ft]
L = twice the height of triangle 1 [m] or [ft]
D = twice the length of the base of both triangles [m] or [ft]
Example:
$UnitSystem SI Pa J K m
D=0.1 [m]
L=0.1 [m]
W=0.2 [m]
F=f3d_43(W,L,D)
{Solution: F=0.04728}
Reference:
Sauer, H.J., "Configuration factors for radiant energy interchange with triangular areas," ASHRAE Transactions, Vol. 80, Part 2, (1974).