SF_17
Function SF_17 provides the shape factor ([m] or [ft]) for a circular disk that is completely buried in a semi-infinite medium.
Inputs:
w = depth of disk below surface ([m] or [ft])
d = diameter of disk ([m] or [ft])
Example: SF = SF_17(d, w)
Reference: Wong, H. (1977). Heat transfer for engineers. London: Longman Group Ltd. p. 24.