@Article{hmt.10.26,
AUTHOR = {Geniy V. Kuznetsov, Alexander E. Nee},
TITLE = {CONDUCTION, CONVECTION, AND RADIATION IN A CLOSED  CAVITY WITH A LOCAL RADIANT HEATER},
JOURNAL = {Frontiers in Heat and Mass Transfer},
VOLUME = {10},
YEAR = {2018},
NUMBER = {1},
PAGES = {1--9},
URL = {http://www.techscience.com/fhmt/v10n1/53457},
ISSN = {2151-8629},
ABSTRACT = {This study deals with the numerical investigation of combined heat transfer via conduction, laminar natural convection, and surface radiation in a 
closed rectangular cavity with a radiant heating source. Unsteady two-dimensional equations of mass, momentum, and energy conservation for 
complex heat transfer process under study were formulated in terms of the vorticity – stream function – temperature variables and solved by means of 
the finite difference method on a uniform grid. Developed numerical code was validated against two benchmark problems of convective and 
convective-radiative heat transfer. When analyzing complex heat transfer regularities, we varied the following parameters: dimensionless time 
5 ≤ τ ≤ 800, Rayleigh number 6·10<sup>4</sup> ≤ <i>Ra</i> ≤ 4·10<sup>6</sup>, conduction-radiation number 19.71 ≤ <i>N<sub>r</sub></i> ≤ 78.84, surface emissivity 0.2 ≤ <i>ε</i> ≤ 0.9, emitter 
length 0.1 ≤ <i>D</i> ≤ 1 , walls thickness 0.05 ≤ <i>M</i> ≤ 0.25. According to the results of mathematical modelling, it was found that the radiant parameters 
significantly affected the formation of differential and integral characteristics of conjugate heat transfer. Along with that the convective Nusselt 
number was slightly changed in geometrical and physical conditions under study. An increase in the walls thickness led to a reduce in the 
temperature of the air cavity. However, the effect of wall thickness on the convective and radiative Nusselt numbers was not significant.},
DOI = {10.5098/hmt.10.26}
}