Contents - Index


SF_15

 

 

 

Function SF_15 provides the shape factor ([m] or [ft]) for conduction between the inner and outer surfaces of a tube defined by two confocal ellipses.

 

Inputs:

 a = major radius of inner ellipse ([m] or [ft])

 b = minor radius of inner ellipse ([m] or [ft])

 c = major radius of outer ellipse ([m] or [ft])

 d = minor radius of outer ellipse ([m] or [ft])

 L = length of tube ([m] or [ft])

 

Example:  SF =  SF_15(a, b, c, d, L)

 

Reference: Wong, H. (1977). Heat transfer for engineers. London: Longman Group Ltd. p. 21.

 

 

Shape Factors Index