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Heat Transfer Research
インパクトファクター: 1.199 5年インパクトファクター: 1.155 SJR: 0.267 SNIP: 0.503 CiteScore™: 1.4

ISSN 印刷: 1064-2285
ISSN オンライン: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.2012004281
pages 163-193

MIXED CONVECTION HEAT AND MASS TRANSFER IN INCLINED CIRCULAR DUCTS

Aicha Bouhezza
Department of Sciences of Matter, Faculty of Science, University of 20 Aout 55-Skikda, Skikda, 21000, Algeria
Omar Kholai
Department of Mechanical Engineering, University of Mentouri Constantine, Constantine, 25000, Algeria
Saadoun Boudebous
Department of Mechanical Engineering, University of Mentouri Constantine, Constantine, 25000, Algeria
Zoubir Nemouchi
Laboratoire d'Energetique Appliquee et de Pollution, Université des Frèses Mentouri, Constantine, Algeria

要約

The effects of thermal and solutal buoyancy forces and inclination angle on the development of laminar mixed convection in a circular inclined duct with uniform heat flux and uniform concentration at the fluid−solid interface on a part of its length was investigated. A three-dimensional elliptic model for three directions was used. The hydrodynamic, temperature, and concentration fields and the circumferentially averaged Nusselt and Sherwood numbers are presented for different combinations of two Richardson numbers and inclination angles. The results show that the velocity, temperature, and concentration distributions, as well as the Nusselt and Sherwood numbers, depend on the thermal Richardson and solutal Richardson numbers and the inclination angle. For a vertical duct with ascending flow, the thermal and solutal buoyancy forces enhance the heat and mass transfer. On the other hand, for a descending flow these forces reduce the heat and mass transfer, decelerate the fluid close to the wall, and produce flow reversal close to the duct wall.


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