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.
About: This article is published in International Journal of Heat and Mass Transfer.The article was published on 1992-04-01. It has received 229 citations till now. The article focuses on the topics: Rayleigh number & Natural convection.
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TL;DR: In this article, a three-dimensional numerical study has been performed to investigate double diffusive, natural convection in a cubic enclosure subject to opposing and horizontal gradients of heat and solute.
Abstract: A three-dimensional numerical study has been performed to investigate double-diffusive, natural convection in a cubic enclosure subject to opposing and horizontal gradients of heat and solute. The flow is driven by buoyancy forces due to temperature and solutal gradients. Constant temperature and concentration are imposed along the two vertical side walls of the cubic enclosure, while the remaining walls are impermeable and adiabatic. The numerical simulations presented here span a wide range of thermal Rayleigh number (10.0
131 citations
TL;DR: In this paper, the effect of buoyancy ratio on the flow structure is investigated numerically for a binary mixture gas in a rectangular enclosure subject to opposing horizontal thermal and compositional buoyancies.
116 citations
TL;DR: In this article, Wang et al. present a numerical approach to visualize conjugate heat and mass transfer in anisotropic media, including diffusion coefficient of transportation function at the interface of different media, different numerical approaches for solving visualization functions, non-dimensional forms of heatfunction and massfunction matching the spatial Nusselt and Sherwood numbers.
114 citations
TL;DR: By optimizing the data layout, minimizing the memory access frequency, and adjusting the number of gangs and vector length, it is shown that the enhanced parallel computations can result in orders of magnitudes of speedup relative to the serial implementation of the LB algorithm.
112 citations
TL;DR: In this article, a two-phase mixture model is used to study natural convection in side-heated square enclosures filled with alumina-water nanofluids having temperature-dependent properties, in the hypothesis that Brownian diffusion and thermophoresis are the primary slip mechanisms between solid and liquid phases.
111 citations
References
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Book•
01 Jan 1980
TL;DR: In this article, the authors focus on heat and mass transfer, fluid flow, chemical reaction, and other related processes that occur in engineering equipment, the natural environment, and living organisms.
Abstract: This book focuses on heat and mass transfer, fluid flow, chemical reaction, and other related processes that occur in engineering equipment, the natural environment, and living organisms. Using simple algebra and elementary calculus, the author develops numerical methods for predicting these processes mainly based on physical considerations. Through this approach, readers will develop a deeper understanding of the underlying physical aspects of heat transfer and fluid flow as well as improve their ability to analyze and interpret computed results.
21,858 citations
Book•
01 Jan 1984
TL;DR: In this paper, the authors describe a transition from Laminar boundary layer flow to Turbulent Boundary Layer flow with change of phase Mass Transfer Convection in Porous Media.
Abstract: Fundamental Principles Laminar Boundary Layer Flow Laminar Duct Flow External Natural Convection Internal Natural Convection Transition to Turbulence Turbulent Boundary Layer Flow Turbulent Duct Flow Free Turbulent Flows Convection with Change of Phase Mass Transfer Convection in Porous Media.
4,067 citations
Book•
01 Jan 1984
TL;DR: In this paper, a reference record was created on 2005-11-18, modified on 2016-08-08 and used for CFD-based transfert de chaleur.
Abstract: Keywords: CFD ; numerique ; transfert de chaleur ; ecoulement Reference Record created on 2005-11-18, modified on 2016-08-08
3,629 citations
TL;DR: In this article, a set of Boussinesq approximations were shown to have solutions of similarity form for combined buoyancy effects, for vertical flows adjacent to surfaces and in plumes, and the resulting equations were integrated for air and water for various practical values of the Schmidt number.
553 citations
TL;DR: 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.
153 citations