The error within this paper is in Eq. (1). The exponent on the square bracket term is given as 1/3 when it should be 1/m. The correct form of Eq. (1) is shown below including the text preceding and following the equation.

For a rectangular duct and an isothermal boundary condition, the dimensionless heat transfer is defined as (11)
$NuA=[(2f(Pr)LA∗)m+({0.6135(f ReALA∗)1/3}5+{3.24(f ReA8π∊1/10)}5)m/5]1/m$
where $f(Pr)$, $f ReA$, $LA*$, and $m$ are defined in Ref. 11. The duct aspect ratio $∊$ is $b/a$.
1.
Muzychka
,
Y. S.
, and
Yovanovich
,
M. M.
, 2004, “
Laminar Forced Convection Heat Transfer in the Combined Entry Region of Non-Circular Ducts
,”
ASME J. Heat Transfer
0022-1481,
126
, pp.
54
61
.