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Computational Thermal Sciences: An International Journal
ESCI SJR: 0.249 SNIP: 0.434 CiteScore™: 1.4

ISSN Печать: 1940-2503
ISSN Онлайн: 1940-2554

Computational Thermal Sciences: An International Journal

DOI: 10.1615/ComputThermalScien.v2.i3.50
pages 269-282

COMPETITION BETWEEN LID-DRIVEN AND NATURAL CONVECTION IN SQUARE CAVITIES INVESTIGATED WITH A LATTICE BOLTZMANN METHOD

Djamel Eddine Ameziani
Faculté de Génie Mécanique et de Génie des Procédés, Université des Sciences et de la Technologie Houari Boumediene USTHB, B.P. 32, El-Alia Bab-Ezzouar, 16111 Algiers, Algeria
Y. Guo
Dalian University of Technology, Dalian 116024, China; University of Paris X-Nanterre, Paris 92410, France
Rachid Bennacer
L2MGC F-95000, University of Cergy-Pontoise, 95031 Cergy-Pontoise Cedex, Paris, France; ENS-Cachan Dpt GC/LMT/CNRS UMR 8535, 61 Ave. du Président Wilson, 94235 Cachan Cedex, France; Tianjin Key Lab of Refrigeration Technology, Tianjin University of Commerce, 300134
Mohammed El Ganaoui
Sciences des Procedes Ceramiques et des Traitements de Surface (SPCTS), UMR CNRS 6638, Faculte des Sciences de Limoges 123, av. A. Thomas - 87060 Limoges Cedex
M. Bouzidi
5LMSSC, CNAM, case 353, 2 rue Conté, 75003 Paris et Univ. Clermont 2, IUT, Av. Atstide Briand, 03100 Montluçon, France

Краткое описание

A lattice Boltzmann method is developed to investigate a situation combining natural and forced lid-driven convection in a two-dimensional square cavity over a very wide range of Rayleigh (Ra) and Reynolds (Re) numbers. The features of dynamic and thermal fields are presented for different Ra and Re to explain the role of Richardson number (Ri) in mixed convection. The flow and heat-transfer characteristics are discussed in both cooperation and opposing cases. Within the scope of this study, the predictive formulas are obtained to describe the heat transfer in terms of relationship between the average Nusselt number (Nu) and the controlling parameters. Different from the Lattice Bhatnagar, Gross and Krook approximation (LBGK) approximation, a lattice Boltzmann model is applied in this work.


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