Constant Cross-Section Fin with Adiabatic Tip
Missing image: constantx.bmp
Dimensional: eta_fin_constantCS(A_c, per, L, h, k)
Function eta_fin_constantCS calculates the fin efficiency of a fin with a constant cross-section and an adiabatic tip. Convection from the tip is not accounted for by correcting the length.
The function then calls a corresponding non-dimensional function, which determines the fin efficiency in terms of the fin parameter mL, described below. Note that the fin surface area that should be used with this fin efficiency is the product of the perimeter and the length
Inputs:
A_c - cross-sectional area [m^2 or ft^2]
per - perimeter [m or ft]
L - length of the fin [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]
The units for the inputs to the function are based on the unit setting in EES.
Example:
$UnitSystem SI
h_bar=20 [W/m^2-K]
L=0.1 [m]
A_c=0.001 [m^2]
per=0.01 [m]
k=15 [W/m-K]
eta=eta_fin_constantcs(A_c, per, L, h_bar, k)
{Solution:
eta=0.9578}
Non-dimensional: eta_fin_constantCS_ND(mL)
Function eta_fin_constantCS_ND returns the fin efficiency of a straight fin with a rectangular base given the product of the fin parameter, m, and fin length, L, where m is defined as:
Missing image: mdef.bmp