For one dimensional heat conduction with adiabatic fin tip, the
fin efficiency is expressed by
g ¼ tanhðmHfÞ
mHf
ð3Þ
where m is defined as
m2 ¼ hP
kAc
ð4Þ
In Eq. (4), P stands for fin perimeter, k for thermal conductivity
and Ac for fin cross-sectional area.
As suggested by Park and Thome [23], an iteration process for
Eqs. (1)–(4) was needed to determine the wall heat flux and heat