Contents - Index


Straight-Base Concave Parabolic Fin

 

 

Dimensional: eta_fin_straight_parabolic(th, L, h, k)

Function eta_fin_straight_parabolic calculates the fin efficiency of a concave parabolic fin with a parabolic base.  The function then calls a corresponding non-dimensional function, which determines the fin efficiency.  Note that the fin surface area that should be used with this fin efficiency is:

 

 

Inputs:

L - length of the fin [m or ft]

th - thickness of the fin at the base [m or ft]

h - heat transfer coefficient [W/m^2-K or Btu/hr-ft^2-R]

k - conductivity of fin material [W/m-K or Btu/hr-ft-R]

 

Example:

$UnitSystem SI K Pa J

L=0.06 [m]

th=0.003 [m]

h=60 [W/m^2-K]

k=200 [W/m-K]

eta=eta_fin_straight_parabolic(th, L, h, k)

 

{Solution: eta=0.7557}

 

 

Non-dimensional: eta_fin_straight_parabolic_ND(mL)

Function eta_fin_straight_parabolic_ND returns the fin efficiency of a concave parabolic fin with a rectangular base given the product of the fin parameter, m, and fin length, L, where m is defined as:

 

Fin Efficiency Index