THERMAL SCIENCE

International Scientific Journal

Abdelaziz Boussandel

,

Siham Laouar-Meftah

,

Noureddine Retiel

NUMERICAL ANALYSIS OF GRAY GAS RADIATION EFFECTS ON HEAT AND MASS TRANSFER IN AN ANNULAR CAVITY

ABSTRACT
This study deals with a numerical investigation of coupled double diffusive natural-convection with thermal radiation in an annular cavity containing a gray gas mixture. The black vertical cylindrical walls are maintained at different temperatures and concentrations to create cooperating flows. The finite volume method (using the SIMPLER algorithm) is used to solve the governing equations and the discrete ordinate method (with S8 quadrature) to treat the radiative aspect of the problem. A parametric study illustrating the influence of the optical thickness and the ratio of buoyancy forces, on the flow field and heat and mass transfer for Reyleigh number equal to 5⋅106 and aspect ratio equal to 1, is performed. The numerical results show that gas radiation modifies the flow structure and the distribution of temperature and concentration in the cavity. The effect of permutation of boundary conditions, between the vertical walls, on heat and mass transfer is also considered. The thermal radiation reduces the total heat transfer in the annular space regardless of the configuration of the boundary conditions.
KEYWORDS
Annulus space, Discrete ordinate method, finite volume method, gas radiation, heat and mass transfer
PAPER SUBMITTED: 2023-01-28
PAPER REVISED: 2023-04-19
PAPER ACCEPTED: 2023-05-02
PUBLISHED ONLINE: 2023-06-11
DOI REFERENCE: https://doi.org/10.2298/TSCI230128124B
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2024, VOLUME 28, ISSUE Issue 1, PAGES [175 - 187]
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Numerical analysis of gray gas radiation effects on heat and mass transfer in an annular cavity

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence