F3D_12

Perpendicular Rectangles with a Common Point

Function f3d_12(a, b, c1, c2) returns the view factor from area 1 to area 2 of two finite rectangles that are oriented perpendicular to each other and having one common point .

Inputs:
a, b, c1 and c2 are the lengths shown in the figure in [m or ft]

Note: The input values must all be greater than 0!

Example:
$UnitSystem SI K Pa J deg
a=0.1 [m]
b=0.5 [m]
c1=0.2 [m]
c2=0.3 [m]
c=0.5 [m]
F=f3d_12(a, b, c1, c2)

{Solution: F=0.0605}

Reference: Chapman A.J., Fundamentals of Heat Transfer, Macmillan Publishing Co., 1987, p. 736

View Factor Index