Journal ArticleDOI
Combined heat and mass transfer by natural convection in a vertical enclosure
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In this paper, the effect of varying the Lewis number is documented by similarity solution valid for Le > 1 in heat-transfer-driven flows, and for Le < 1 in mass-transfer driven flows.Abstract:
The phenomenon of natural convection caused by combined temperature and concentration buoyancy effects is studied analytically and numerically in a rectangular slot with uniform heat and mass fluxes along the vertical sides. The analytical part is devoted to the boundary layer regime where the heat and mass transfer rates are devoted to the boundary layer regime where the heat and mass transfer rates are ruled by convection. An Oseen-linearized solution is reported for tall spaces filled with mixtures characterized by Le = 1 and arbitrary buoyancy ratios. The effect of varying the Lewis number is documented by similarity solution valid for Le > 1 in heat-transfer-driven flows, and for Le < 1 in mass-transfer-driven flows. The analytical results are validated by numerical experiments conducted in the range 1 {le} H/L {le} 4, 3.5 {times} Ra {le} 7 {times} 10{sup 6}, {minus}11 {le} n {le} 9, 1 {le} Le {le} 40, and Pr = 0.7, 7. Massline patterns are used to visualize the convective mass transfer path and the flow reversal observed when the buoyancy ratio n passes through the value {minus}1.read more
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Numerical study of double-diffusive natural convection in a square cavity
TL;DR: In this article, the influence of buoyancy force on heat or mass transfer rate was investigated in a stable state thermosolutal convection in a square cavity filled with air, submitted to horizontal temperature and concentration gradient.
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Double-diffusive mixed convection in a lid-driven enclosure filled with a fluid- saturated porous medium
K. Khanafer,Kambiz Vafai +1 more
TL;DR: In this paper, the authors present a numerical study of mixed-convection heat and mass transport in a lid-driven square enclosure filled with a non-Darcian fluid-saturated porous medium.
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Bejan’s Heatlines and Masslines for Convection Visualization and Analysis
TL;DR: The origins and evolution of the heatlines and masslines as visualization and analysis tools, from their first steps to the present are described.
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Lid-driven cavity with heat and mass transport
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Journal ArticleDOI
Numerical simulation of combined thermal and mass transport in a square lid-driven cavity
TL;DR: In this paper, the authors investigated steady mixed convection in a square lid-driven cavity under the combined buoyancy effects of thermal and mass diffusion and solved the transport equations numerically using the Galerkin weighted residual method.