Heat transfer and fluid flow of nanofluid-filled enclosure with two partially heated side walls and different nanoparticles

Jmai, Ridha; Ben-Beya, Brahim; Tong, Lili

doi:10.1016/j.spmi.2012.10.003

Cited by 41 publications

(23 citation statements)

References 27 publications

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“…For (Ra=10 4 ), the average Nusselt number ratio increases in a non-linear way with the increasing of Rayleigh number, because the heat transfer is associated to conduction and convection regime effect. For Ra>10 4 , Num * increases linearly with the increase of Rayleigh number, this is justified by the higher buoyancy force effects, and the heat transfer inside the cavity is dominated by convection. In addition, the highest values for Nusselt number ratio are found at Ra = 10 6 , where a stronger buoyant flow field appears in the enclosure.…”

Section: Resultsmentioning

confidence: 95%

“…During the several past years, numerical studies of nanofluid free convection in a square cavity were well studied and discussed [2][3][4][5][6]. In particular, Aminossadati and Ghasemi [7] investigated free convection of nanofluid in a square cavity cooled from two vertical and horizontal walls and heated by a constant heat flux on its horizontal bottom wall.…”

Section: Introductionmentioning

confidence: 99%

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Natural Convection and Entropy Generation of Nanofluids in a Square Cavity

Bouchoucha¹,

Bessaïh²

2015

IJHT

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The present paper investigates the natural convection and entropy generation of nanofluids in a square cavity. The left and right vertical walls of the cavity are maintained at a local high temperature TH (heat source) and a local cold temperature TC, respectively. The horizontal walls are adiabatic. The governing equations are discretised by using the finite volume method. A computer program based on the SIMPLER algorithm is developed and compared with the numerical results found in the literature. Results are presented in terms of the average Nusselt number and total entropy generation for a wide range of the Rayleigh number (10 4 Ra10 6 ), solid volume fraction (0ϕ0.1) of nanoparticles, dimensionless heat source lengths (0.50B1), and different type of nanofluids. It is observed that the average Nusselt number ratio increases with the solid volume fraction, and the maximum total entropy generation ratio occurs at a low Rayleigh number for different values of ϕ.

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Section: Resultsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Natural Convection and Entropy Generation of Nanofluids in a Square Cavity

Bouchoucha¹,

Bessaïh²

2015

IJHT

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“…The generic variable χ stands for U, V, P, and θ, it indicates the iteration level and the subscript sequence (i, j) represents space coordinates X and Y. Simulations were performed by using a finite volume home FORTRAN code-named «NASIM» [Jmai et al (2013), Ben-Beya and Lili (2008), and Ben-Beya and Lili (2009)] developed by the second author which uses the numerical methodology described above. Approximations were solved by a point successive overrelaxation method (PSOR) with optimum relaxation factor.…”

Section: Governing Equation For Entropy Generationmentioning

confidence: 99%

“…Because of the presence of large gradients near the walls, a grid system was constructed with a finer non-uniform centrosymmetric grid with clustering near the walls according to a special tangent hyperbolic distribution using the following grid point distribution (Fig.1 c), more details can be found in our previous work [Ben-cheikh et al (2008) and Jmai et al (2013) …”

Section: Grid Independencementioning

confidence: 99%

Magnetoconvection and entropy generation of nanofluid in an enclosure with an isothermal block: Performance evaluation criteria analysis

Belhaj

Ben-Beya

2018

JTST

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In this paper, heat transfer and entropy generation of MHD natural convection of Carbone NanoTube (CNT)-water nanofluids in a square cavity with and without isothermal block are numerically studied. The cavity is heated sinusoidally, according to the X coordinate, from below and it is cooled isothermally from the top. The two vertical walls are kept adiabatic. Three cases were investigated: square cavity without block (WB), with cold block (CB), and with hot block (HB). The nonlinear governing equations and boundary conditions are discretized using finite volume approach with the Quick scheme and solved numerically by projection algorithm for the pressure-velocity coupling together with the multigrid solver. Simulations were carried out based on various flow-governing parameters such as Hartmann number (0

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“…The results show that the concentration of Al2O3 is not significant effects on hydrodynamic parameters, and that the heat transfer coefficient is maximum when the angle of inclination is equal to 45°. Jmai et al [12] and Mahmoudi et al [13] examined the effects of parameters such as the Rayleigh number, the solid volume fraction of nanoparticles and the heat sources locations on the natural convection flow in a partially heated cavity filled with different types of nanoparticles (Cu, Ag, Al2O3 and TiO2). They found that the heat transfer increases with the increasing of Rayleigh number and concentration of the nanoparticle, and the Cu-water nanofluid ensures a very high transfer versus nanofluids (water-Al2O3 and water-TiO2).…”

Section: Introductionmentioning

confidence: 99%

Mixed Convection in Lid-Driven Cavities Filled With a Nanofluid

Zeghbid¹,

Bessaïh²

2015

IJHT

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This present work concerns the study of laminar mixed convection in lid-driven cavities filled with Cu-water nanofluid. Each cavity is heated by two heat sources placed on vertical walls at a constant heat flux q. The top wall moved with uniform velocity of U0. The top and bottom walls of the cavity are maintained at a local cold temperature TC, respectively. The continuity, Navier-Stokes, and energy equations are all solved by using the finite volume method. A computer program is developed and compared with the numerical results found in the literature. Results are presented in terms of streamlines, isotherms, vertical velocity profile, and average Nusselt numbers at a fixed Reynolds number (Re=10) and for Rayleigh numbers in the range (Ra=10 3 -10 6 ), solid volume fractions of nanoparticles (=0-0.20) and different aspect ratios (AR=0.5-4). It is found that the average Nusselt number increases with the increase of the Rayleigh number, solid volume fraction and aspect ratio of the cavity.

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Heat transfer and fluid flow of nanofluid-filled enclosure with two partially heated side walls and different nanoparticles

Cited by 41 publications

References 27 publications

Natural Convection and Entropy Generation of Nanofluids in a Square Cavity

Natural Convection and Entropy Generation of Nanofluids in a Square Cavity

Magnetoconvection and entropy generation of nanofluid in an enclosure with an isothermal block: Performance evaluation criteria analysis

Mixed Convection in Lid-Driven Cavities Filled With a Nanofluid

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