Natural convection investigation in square cavity filled with nanofluid using dispersion model

Boualit, Abdelhamid; Zeraibi, Noureddine; Chergui, Toufik; Lebbi, Mohamed; Boutina, Lyes; Laouar, Salima

doi:10.1016/j.ijhydene.2016.07.132

Cited by 49 publications

(11 citation statements)

References 36 publications

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“…Other works concentrated on the study of the nanofluids in the square cavities [10]. Boualit et al [11] and Khanafer et al [12] used finite element as well as finite volume methods to solve the same problems. temperature (Th) imposed on the left wall while the cold temperature (Tc) is on the right wall (Dirichlet conditions).…”

Section: Mathematical Formulationmentioning

confidence: 99%

“…In order to quantify the thermal transfer within the cavity, and to characterize the effect of increasing nanofluid volume fraction, the value of the local Nusselt and the Nusselt average must be determined. These parameters are calculated as follows: (11) and (k eff ) stagnant is the effective stagnant conductivity [12], C p the specific heat, the constant C is determined experimentally C=0.4 [11][12] for cooper-water nanofluid, ψ is the stream function and ω is the vorticity.…”

Section: Mathematical Formulationmentioning

confidence: 99%

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Numerical modelling of natural convection in a square cavity: effect of nanofluid volume fraction and inclination

2018

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In this paper, the phenomenon of natural convection in a square cavity filled with copper (Cu) -based nanofluid (Nf) has been studied. The influences of the volume fraction (ф) on the convective flow, as well as the effect of the inclination (γ) of the cavity on thermal performances were examined. The dimensionless governing equations formulated using stream function, vorticity, and temperatures were solved by finite difference methods, where the Successive Over-Relaxation (SOR) iteration and the upwind scheme were adopted. The developed code served as a verification of results where it showed a good agreement with previous works. The calculation code was then used to visualize the influence of the inclination on the thermal enhancement and showed that the transfer becomes more efficient with an inclination of π/6.

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Section: Mathematical Formulationmentioning

confidence: 99%

Section: Mathematical Formulationmentioning

confidence: 99%

Numerical modelling of natural convection in a square cavity: effect of nanofluid volume fraction and inclination

2018

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“…The results showed the effects of the governing parameters on the local Nusselt number, average Nusselt number, streamlines, and isotherms. Boualit et al [ 24 ] and Liao [ 25 ] studied respectively natural convection heat transfer of Cu- and Al 2 O 3 -water nanofluids in a square enclosure under the horizontal temperature gradient. Both the flow structure and the corresponding heat transfer characteristics at different Rayleigh numbers and nanoparticle volume fractions were obtained.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Natural Convection Heat Transfer in a Porous Annulus Filled with a Cu-Nanofluid

Zhang

2021

Nanomaterials

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Natural convection heat transfer in a porous annulus filled with a Cu nanofluid has been investigated numerically. The Darcy–Brinkman and the energy transport equations are employed to describe the nanofluid motion and the heat transfer in the porous medium. Numerical results including the isotherms, streamlines, and heat transfer rate are obtained under the following parameters: Brownian motion, Rayleigh number (103–105), Darcy number (10−4–10−2), nanoparticle volume fraction (0.01–0.09), nanoparticle diameter (10–90 nm), porosity (0.1–0.9), and radius ratio (1.1–10). Results show that Brownian motion should be considered. The nanoparticle volume fraction has a positive effect on the heat transfer rate, especially with high Rayleigh number and Darcy number, while the nanoparticle diameter has an inverse influence. The heat transfer rate is enhanced with the increase of porosity. The radius ratio has a significant influence on the isotherms, streamlines, and heat transfer rate, and the rate is greatly enhanced with the increase of radius ratio.

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“…Other investigators have investigated several nanofluidfilled geometries [6][7][8], different thermal boundary conditions, [9][10][11], and different internal shapes [12,13] for improvement and intensification of heat exchange.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Free Convection in a Three-Dimensional Enclosure Full of Nanofluid with the Existence a Magnetic Field

Bouchta¹,

Feddaoui²

2020

EJEE

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A numerical analysis was performed to study the influence of a magnetic field in free convection in a cube full with nanofluid. To solve the equation, we appeal to finite volume method. The SIMPLEC algorithm is used for pressure-velocity coupling. All walls are adiabatic, except for the left and right walls that are heated differently. The effects of the Rayleigh and Hartmann numbers, as well as the volume fraction of nanometric particles were studied. Results are conveyed in the form of isotherms, streamlines, velocity curves and Nusselt numbers. It has been shown that as the percentage of nanoparticles increases and the number of Rayleigh increases, heat transfer improves. Hartman number has considerable influence on hydrodynamic and thermal field.

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Natural convection investigation in square cavity filled with nanofluid using dispersion model

Cited by 49 publications

References 36 publications

Numerical modelling of natural convection in a square cavity: effect of nanofluid volume fraction and inclination

Numerical modelling of natural convection in a square cavity: effect of nanofluid volume fraction and inclination

Numerical Study of Natural Convection Heat Transfer in a Porous Annulus Filled with a Cu-Nanofluid

Numerical Simulation of Free Convection in a Three-Dimensional Enclosure Full of Nanofluid with the Existence a Magnetic Field

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