@Article{fdmp.2018.01114,
AUTHOR = {Hamici  Nadjib, Sahi  Adel, Sadaoui  Djamel, Djerrada  Abderrahmane},
TITLE = {Numerical Investigation of Combined Surface Radiation and Free Convection in a Square Enclosure with an Inside Finned Heater},
JOURNAL = {Fluid Dynamics \& Materials Processing},
VOLUME = {14},
YEAR = {2018},
NUMBER = {3},
PAGES = {155--175},
URL = {http://www.techscience.com/fdmp/v14n3/24644},
ISSN = {1555-2578},
ABSTRACT = {The study goes further to investigate a two-dimensional numerical model coupling free convection and surface radiation in an air-filled cavity containing a heated thin finned plate. The square enclosure is subjected to isothermal and insulated boundary conditions while the heating element location is varied from the horizontal position (<i>HPFU, HPFD</i>) to the vertical position (<i>VPFL</i>). The dimensionless governing equations under Boussinesq approximations are coupled with a radiative model through the boundaries conditions and solved by the Finite Volume Method. The effects of the pertinent parameters, namely, Rayleigh number (10<sup>3</sup>≤Ra≤10<sup>6</sup>), fin length (0.125≤L<sub>a</sub>≤0.875), fin position (0.25≤H<sub>a</sub>≤0.75) and wall emissivity (0≤ε≤1) are investigated for a constant plate length (A=0.5). Results discussed in terms of streamlines, isotherms, convective and radiative Nusselt numbers highlighted the condition of the heat transfer improvement within the cavity which show an optimal thermal performance for a <i>VPFL</i> case (H<sub>a</sub>=0.75 and L<sub>a</sub>=0.875). Correlations are also developed for convective and Nusselt numbers for H<sub>a</sub>=0.25 and L<sub>a</sub>=0.5 with a maximum deviation less than 4%.},
DOI = {10.3970/fdmp.2018.01114}
}