Half circle to enclosure formed by second half-circle with common edge
Function F3D_76 returns the view factor between a half-circle and the surface swept out by a the motion of a second half-circle as it is rotated an angle alpha
The calling protocol is:
F=F3D_76(alpha)
Inputs:
alpha: angle (deg or rad)
Reference:
Cabeza Lainez, Jose Maria: Solar Radiation in Buildings. Transfer and Simulation Procedures, Chapter 16 of Solar Radiation, Babatunde, E.B., ed., InTech open source publishers, 2012.
Example:
$UnitSystem Radian
alpha=pi/3
F=F3D_76(alpha)
{Solution
F=0.5556}