F3D_32

Radiation View Factor- Plate to plate with cylinder between

$f3d_32 function returns the view factor between two equal sized rectangular surfaces with a circular cylinder placed between them. The circular cylinder must be of equal or lesser length (y-direction) than the flat plates and centered in both the x- and y-direction.

Inputs:
w = width of the rectangle [m or ft]
h = length of the rectangle [m or ft]
d= diameter of the cylinder [m or ft]
k = length of the cylinder [m or ft]
s_f is the distance between the center of the cylinder and rectangular surface 1
s_b is the distance between the center of the cylinder and rectangular surface 2
N is the number of rays to use in the Monte Carlo approximation. Set to 0 for the default.

Example:
$UnitSystem SI K Pa J rad
w=0.50 [m]
h=1.00 [m]
d=0.10 [m]
k=1.00 [m]
s_f=0.05 [m]
s_b=0.05 [m]
N=100000
F=f3d_32(w, h, d ,k, s_f, s_b, N)

{Solution: F=0.52}

Notes:

This routine uses a Monte Carlo technique to calculate the view factor.

The view factor algorithm was contributed by Jacob Brenner.