There are three mistakes in typing the formula which are as follows:

• 1
On the right hand of Eq. 4, the radiative heat flux ($∇·qr$) must be negative, but in the paper, it is positive. The correct form of Eq. 4 is as follows:
$∂∂x(ρucpT)+∂∂y(ρvcpT)=κ(∂2T∂x2+∂2T∂y2)-∇·qr$
4
• 2
In Eq. 15, Spi must be multiply by $β∀$ (Beta · Volume). Equation 15 is a well known equation in radiative heat transfer and can be found in Ref. [13]. The correct form of this equation is as follows:
$Ip...$

Reference
1.
Modest
,
M. F.
, 2003,