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Computational Thermal Sciences: An International Journal

Publication de 6  numéros par an

ISSN Imprimer: 1940-2503

ISSN En ligne: 1940-2554

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ON THE STEADY AND UNSTEADY ASPECTS OF COMBINED SORET EFFECT AND DOUBLE-DIFFUSIVE CONVECTION IN A BENARD SQUARE CAVITY SUBMITTED TO A HORIZONTAL GRADIENT OF CONCENTRATION

Volume 5, Numéro 1, 2013, pp. 43-61
DOI: 10.1615/ComputThermalScien.2012004125
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RÉSUMÉ

In this paper, a numerical study of the incidence of Soret effect on double-diffusive convection in a Benard square cavity submitted to a horizontal gradient of concentration is presented. The computations, which are limited to water-based solutions, are carried out for governing parameters; namely, the Lewis number, Le; Soret parameter, M; buoyancy ratio, N; Prandtl number, Pr; and thermal Rayleigh number, RaΤ; such that Le = 10, −111 ≤ M ≤ 122, −0.1 ≤ N ≤ 0.1, Pr = 7, and 5 × 104RaΤ ≤ 5 × 105. In such a situation it is possible to discover a wide variety of steady-state solutions that are stable up to a threshold value of M. The effect of M on the flow, temperature, and concentration fields and the resulting heat and mass transfers are analysed for given values of N and RaΤ. It is demonstrated that the heat and mass transfers could change significantly from one solution to another, depending on M. Moreover, particular attention is paid to the oscillatory behavior of the convection that appears for M in the ranges M < −50.2 (for vertical bicellular flow) and M < −23.8 (for horizontal bicellular flow) and at specific values of N and RaΤ.

CITÉ PAR
  1. Wu Chun-Mei, Luo Jia-Qian, Yu Jia-Jia, Li You-Rong, Thermocapillary convection of a binary mixture with the Soret effect in a shallow annular pool heated from below, Fluid Dynamics Research, 51, 6, 2019. Crossref

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