F3D_61

Disk to second disk in a sphere with intersection outside of disks.

Function f3d_61(h_1,h_2,r_s) returns the view factor between two non-intersecting disks that are inscribed in a sphere. The axes of the disk intersect at the center of the sphere and the intersection point is outside of the disks.

Inputs:
h_1 = distance from center of disk 1 to center of sphere [m] or [ft]
h_2 = distance from center of disk 2 to center of sphere [m] or [ft]
r_s = radius of sphere [m] or [ft]

Example:
$UnitSystem SI Mass J K Pa Radian
h_1=0.25 [m]
h_2=0.15 [m]
r_s=0.5 [m]
F=f3d_61(h_1,h_2,r_s)
{F = 0.8667}

Reference:
Feingold, A., 1978, "A new look at radiation configuration factors between disks," J. Heat Transfer, Vol. 100, no. 4, pp. 742-744, November.