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Disk to disk (same center)



Function f3d_3(r_1, r_2, a) returns the view factor value of one disk (finite area) from another one (finite area) parallel to it which has its center along the same normal.  

Inputs:
 r_1  is the radius of disk 1  [m or ft]
 r_2  is the radius of disk 2  [m or ft]
a  is the parallel distance between both disks  [m or ft]

Example:  
$UnitSystem SI K Pa J deg
r_1=0.1 [m]
r_2=0.2 [m]
a=0.5 [m]
F=f3d_3(r_1, r_2, a)

{Solution:  
F=0.1339 }


Reference:  Siegel and Howell, Thermal radiation heat transfer, 4th edition, p.845.

View Factor Index