Double diffusive convection in a cubic enclosure with opposing temperature and concentration gradients

Sezai, I.; Mohamad, A. A.

doi:10.1063/1.1286422

Cited by 146 publications

(84 citation statements)

References 36 publications

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“…It important to point out that, at this specific value of buoyancy ratio, the effects of thermal and solutal cells are of comparable magnitude as revealed by the 2-D numerical work of Nishimura et al [1]. Moreover, a similar behavior of the flow rates presenting a minimum at N=-1 was also observed by Sezai and Mohamad [3] for a cubic enclosure. On another hand, and in order to demonstrate the three-dimensionality of the flow, the isosurfaces of the transverse v-velocity component is illustrated in Fig.…”

Section: International Letters Of Chemistry Physics and Astronomy Vosupporting

confidence: 75%

“…However, only a few studies focused on the doublediffusive convection within three-dimensional enclosures flow. In this context, Sezai and Mohamad [3] numerically examined the double diffusive convection within a cubic enclosure and indicated that the thermosolutal flow in enclosures with opposing buoyancy forces is strictly three dimensional for a certain range of parameters. Very recently, unsteady three-dimensional (3D) double diffusive convection in tilted enclosure having a parallelepipedic shape has been analyzed numerically by Oueslati et al [4].…”

Section: Introductionmentioning

confidence: 99%

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Some Aspects of the Three-Dimensional Double-Diffusive Natural Convection in a Parallelepipedic Tilted Solar Distiller

Oueslati

Ben-Beya

Tong

2015

ILCPA

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ABSTRACT. Three-dimensional double-diffusive natural convection in a parallelepipedic solar distiller inclined with an angle is investigated in the current study. Computations are performed using a home code "NASIM" based on the finite volume method and a full multigrid technique. It is found that iso-surfaces relative to temperature field undergo a central stratification while the lower and upper gradients seem to be significantly strengthened by gradually increasing the Rayleigh number values. In terms of buoyancy ratio effects, projection of thermal and solutal isocontours at the mid plane (y=1) showed that the flow intensity is significantly enhanced by monotonously increasing N for aiding flow situation (N>0). In addition, and according to all Rayleigh number values, the variation of average Nusselt and Sherwood numbers seem to be minimum for N=-1 with weaker values for opposing flow situation. On another hand, isosurfaces of the transverse v-velocity component showed the importance of the 3-D effects that manifest within the solar distiller.

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Section: International Letters Of Chemistry Physics and Astronomy Vosupporting

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Some Aspects of the Three-Dimensional Double-Diffusive Natural Convection in a Parallelepipedic Tilted Solar Distiller

Oueslati

Ben-Beya

Tong

2015

ILCPA

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“…Mergui and Gobin [8] have studied transient double-di usive convection in a vertical enclosure with asymmetrical boundary conditions. The three-dimensional aspects of thermosolutal natural convection in a cubic enclosure subject to horizontal and opposing gradients of heat and solute have been reported by Sezai and Mohamad [9]. Double-di usive convection in an annular enclosure with a hot inner cylinder has been investigated by Wang et al [10].…”

Section: Introductionmentioning

confidence: 95%

Double-Diffusive Convection in a Porous Enclosure With Cooperating Temperature and Concentration Gradients and Heat Generation or Absorption Effects

Chamkha¹

2002

Numerical Heat Transfer, Part A: Applications

115

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The problem of unsteady, laminar double-diffusive convective ow of a binary gas mixture in a rectangular enclosure lled with a uniform porous medium is considered. A temperature-dependent heat source or sink is assumed to exist within the enclosure boundaries. Transverse cooperating gradients of heat and mass are applied on the two opposing vertical walls of the enclosure while the other two horizontal walls are adiabatic and impermeable to mass transfer. A numerical solution based on the nite-difference methodology is obtained. Representative results illustrating the effects of the inverse Darcy number, the heat generation or absorption coef cient, and the buoyancy ratio on the contour maps of the streamline, temperature, and concentration as well as the pro les of velocity, temperature, and concentration at the midsection of the enclosure are reported. In addition, results for the average Nusselt and Sherwood numbers are presented in tabulated form and discussed for various parametric conditions.

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“…[4][5][6]. Furthermore, some 3D results of double diffusive natural convection, with combined actions of thermal and solutal buoyancy forces in porous enclosures can be found in [7] and [8].…”

Section: Introductionmentioning

confidence: 97%

Three-dimensional natural convection in a porous cavity by the boundary element method

Jecl¹,

Kramer²,

Ravnik³

et al. 2011

WIT Transactions on the Built Environment

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A thee-dimensional numerical simulation of convective flow in porous media using an algorithm based on a combination of a single domain and a subdomain boundary element method (BEM) is presented. The fluid flow in porous media is modeled with the modified Navier-Stokes equations (Brinkman-extended Darcy formulation with inertial term included) coupled with the energy and species equations using the Boussinesq approximation. The velocity-vorticity formulation is adopted to solve the governing set of equations, which results in decoupling of the computational scheme into the kinematic and kinetic computational parts. The boundary vorticity values are calculated by a single domain BEM solution of the kinematics equation, while the subdomain BEM is used to solve the vorticity, energy and species transport equations. Computations are performed for various governing parameters (Rayleigh number, Darcy number, Lewis number, buoyancy coefficient) and, simulation results are compared to the results of some published studies. Heat and mass flux through the cavity and flow fields are analyzed, focusing on the 3D nature of the phenomena.

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Double diffusive convection in a cubic enclosure with opposing temperature and concentration gradients

Cited by 146 publications

References 36 publications

Some Aspects of the Three-Dimensional Double-Diffusive Natural Convection in a Parallelepipedic Tilted Solar Distiller

Some Aspects of the Three-Dimensional Double-Diffusive Natural Convection in a Parallelepipedic Tilted Solar Distiller

Double-Diffusive Convection in a Porous Enclosure With Cooperating Temperature and Concentration Gradients and Heat Generation or Absorption Effects

Three-dimensional natural convection in a porous cavity by the boundary element method

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