SF_22
Function SF_22 provides the shape factor ([m] or [ft]) for a hemisphere that is buried in a semi-infinite medium with the planar section coincident with the medium surface.
Input:
d = diameter of hemisphere ([m] or [ft])
Example: SF = SF_22(D)
Reference: White, F. (1984). Heat transfer. Reading, Massachusettes: Addison-Wesley. p. 120.