SF_6
Function SF_6 provides the shape factor ([m] or [ft]) for conduction between the external surfaces of a beam (a rectangular cross section extrusion) buried in a semi-infinite medium.
Inputs:
a = width of beam (parallel to surface) ([m] or [ft])
b = thickness of beam (perpendicular to surface) ([m] or [ft])
w = depth of beam (surface to top of beam) ([m] or [ft])
L = length of beam ([m] or [ft])
Example: SF = SF_6(b, a, w, L)
Reference: Incropera, F. & DeWitt, D. (2002). Fundamentals of heat and mass transfer, 5th ed. Hoboken, New Jersey: John Wiley & Sons. p. 193-194.
Example:
$UnitSystem SI Mass J K Pa Radian
$VarInfo b, a, w, L, SF units=m
b = 0.1 [m]
a = 0.4 [m]
w = 1.2 [m]
L = 4 [m]
SF = SF_6(b, a, w, L)
{Solution:
SF = 7.49 [m]}