SF_8
Function SF_8 provides the shape factor ([m] or [ft]) for conduction between a disk on the surface of a semi-infinite medium and the surface of the medium.
Input:
D = diameter of disk ([m] or [ft])
Example: SF = SF_8(D)
Reference: Incropera, F. & DeWitt, D. (2002). Fundamentals of heat and mass transfer, 5th ed. Hoboken, New Jersey: John Wiley & Sons. p. 193-194.