SF_20
Function SF_20 provides the shape factor ([m] or [ft]) for conduction between two parallel disks of equal diameter that are buried in an infinite medium.
Inputs:
D = diameter of disks ([m] or [ft])
w = distance between disks ([m] or [ft])
Example: SF = SF_20(D, w)
Reference: Rolle, K. (2000). Heat and mass transfer. Columbus, Ohio: Prentice Hall. p.79.
Example:
$UnitSystem SI Mass J K Pa Radian
$VarInfo D, w, SF units=m
D = 0.1 [m]
w = 0.6 [m]
SF = SF_20(D, w)
{Solution:
SF = 0.2112 [m]}