Interior of an infinite semicylinder to itself with infinite cylinder interposed
Function F2D_8(r1, r2) returns the view factor from an infinite semicircle to itself while an infinite cylinder is positioned at the center of the semicircle.
Inputs:
r1 = the radius of the cylinder [m or ft]
r2 = the radius of the semicylinder [m or ft]
Example:
$UnitSystem SI K Pa J deg
r1=0.1 [m]
r2=0.2 [m]
F=F2D_8(r1, r2)
{Solution: F=0.282}
Reference: Howell, J. A catalog of radiation configuration factors. New York: McGraw Hill, 1982. p. 145.