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Computational Thermal Sciences: An International Journal
ESCI SJR: 0.244 SNIP: 0.434 CiteScore™: 0.7

ISSN Print: 1940-2503
ISSN Online: 1940-2554

Computational Thermal Sciences: An International Journal

DOI: 10.1615/ComputThermalScien.v2.i2.30
pages 125-138

COMBINED BUOYANCY EFFECTS OF THERMAL AND MASS DIFFUSION ON LAMINAR CONVECTION IN A VERTICAL ISOTHERMAL CHANNEL

Othmane Oulaid
LMFE, Physics Department, Faculty of Sciences Semlalia, PO Box : 2390, Marrakech 40 001, Morocco; and THERMAUS, Département de génie mécanique, Université de Sherbrooke, Sherbrooke J1K 2R1, Québec, Canada
Brahim Benhamou
Fluid Mechanics and Energetic Laboratory, CNRST Associate Unit URAC27,Cadi Ayyad University, Morocco
Nicolas Galanis
THERMAUS, Département de génie mécanique, Université de Sherbrooke, Sherbrooke J1K 2R1, Quèbec, Canada

ABSTRACT

This paper reports on a numerical study of laminar mixed convection flow associated with mass transfer and phase change in a vertical parallel-plate channel. The plates are wetted by thin liquid water films and maintained at a constant temperature lower than that of the air entering the channel. The solution of the governing equations is based on the finite volume method with the well-known SIMPLER algorithm for handling the velocity-pressure coupling. Numerical results show that buoyancy forces have an important effect on the hydrodynamic field, as well as on the heat- and mass-transfer characteristics. These forces induce a flow reversal. Additionally, heat transfer associated with phase change (i.e., latent heat transfer) is more important compared to sensible heat transfer.


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