SF_13
Function SF_13 provides the shape factor ([m] or [ft]) for conduction through edges of adjoining walls of equal thickness. Note that this is the additional heat transfer that occurs at the edge beyond the 1D heat transfer that occurs between the inner and outer walls.
Inputs:
D = depth of wall ([m] or [ft])
L = thickness of wall ([m] or [ft])
Example: SF = SF_13(D, 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 D, L, SF units=m
D = 1 [m]
L = 0.1 [m]
SF = SF_13(D, L)
{Solution:
SF = 0.54 [m]}