Concentric cylinders
Function F3D_5(r_1, r_2, w) returns the configuration factor from the area of the outermost of two concentric cylinders (of the same finite length) to itself, i.e., F_2,2.
Inputs:
r_1 - radius of the inner cylinder [m or ft]
r_2 - radius of the outer cylinder [m or ft]
w - length of the cylinders [m or ft]
Example:
$UnitSystem SI K Pa J deg
r_1=0.1 [m]
r_2=0.2 [m]
w=0.5 [m]
F_2_2=F3D_5(r_1, r_2, w)
{Solution: F_2_2=0.357 }
See F3D_4 for the view factor from the inner to outer cylinder.
Reference: http://www.me.utexas.edu/~howell/sectionb/C-91.html