TY  - EJOU
AU  - Prasad, Ravi Shankar 
AU  - Nayak, Ujjwal Kumar 
AU  - Nayak, Rajen Kumar 
AU  - Gupta, Amit Kumar 

TI  - COMBINED NATURAL CONVECTION AND SURFACE RADIATION IN  A SQUARE CAVITY WITH THE INVERSELY LINEARLY HEATED OPPOSITE SIDE WALLS
T2  - Frontiers in Heat and Mass Transfer

PY  - 2022
VL  - 19
IS  - 1
SN  - 2151-8629

AB  - This paper presents the results of numerical analysis of coupled laminar natural convection and surface radiation in a two-dimensional closed square 
cavity with the inversely linearly heated vertical opposite side walls and the adiabatic top and bottom walls. The cavity is filled with natural air (Pr =
0.70) as the fluid medium. In the present study, the governing equations i.e., Navier-Stokes Equation in the stream function - vorticity form and Energy 
Equation are solved for a constant property fluid under the Boussinesq approximation. For discretization of these equations, the finite volume technique 
is used. For the radiation calculations, the radiosity-irradiation formulation is used and the shape factors are calculated using the Hottel’s crossed-string 
method. The effects of pertinent parameters like Rayleigh Number (10<sup>3</sup> ≤ Ra ≤ 10<sup>6</sup>
) and the surface emissivity of walls (0.05 ≤ε≤ 0.85) are studied 
and analyzed.
KW  - <i>natural convection
KW  -  surface radiation
KW  -  stream function
KW  -  vorticity
KW  -  inversely linearly heated
KW  -  closed cavities.</i>

DO  - 10.5098/hmt.19.4