Flow in open C-shaped cavities: How far does the change in boundaries affect nanofluid?

Bakier, M.A.Y.

doi:10.1016/j.jestch.2014.04.007

Cited by 18 publications

(7 citation statements)

References 24 publications

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“…It should be, however, mentioned at this end that Mahmoodi and Hashemi (2012) have numerical study of natural convection of a nanofluid in C-shaped enclosures. Bakier (2014) has been also considered the flow of a viscous fluid in open C-shaped cavities, while Makulati et al (2016) numerically treated the natural convection of a water-alumina nanofluid in inclined C-shaped enclosures under the effect of magnetic field.…”

Section: Hffmentioning

confidence: 99%

Effects of cavity and heat source aspect ratios on natural convection of a nanofluid in a C-shaped cavity using Lattice Boltzmann method

Izadi

Mohebbi

Chamkha

et al. 2018

HFF

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Purpose The purpose of this paper is to consider natural convection of a nanofluid inside of a C-shaped cavity using Lattice Boltzmann method (LBM). Design/methodology/approach Effects of some geometry and flow parameters consisting of the aspect ratio of the cavity, aspect ratio of the heat source; Rayleigh number (Ra = 103 − 106) have been investigated. The validity of the method is checked by comparing the present results with ones from the previously published work. Findings The results demonstrate that for Ra = 103, the aspect ratio of the heat source has more influence on the average Nusselt number in contrast to the case of Ra = 106. Contrary to the fact that the average Nusselt number increases non-linearly more than twice because of the increase of the aspect ratio of the enclosure at Ra = 103, the average Nusselt number has a linear relation with the aspect ratio for of Ra = 106. Therefore, upon increasing the Rayleigh number, the efficiency of the aspect ratio of the cavity on the thermal convection, gradually diminishes. Originality/value The authors believe that all the results, both numerical and asymptotic, are original and have not been published elsewhere.

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Section: Hffmentioning

confidence: 99%

Effects of cavity and heat source aspect ratios on natural convection of a nanofluid in a C-shaped cavity using Lattice Boltzmann method

Izadi

Mohebbi

Chamkha

et al. 2018

HFF

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“…Augmentation of natural convection heat transfer in triangular shape solar collector by utilizing water based nanofluids having a corrugated bottom wall studied by . Numerical modeling for natural convection in partially C-shape open ended enclosure filled with nanofluid performed by (Bakier 2014). The author found that internal energy is related to cavity aspect ratio and the temperature all over the cavity increases as heat source length increases.…”

Section: Page 36mentioning

confidence: 99%

Study of Exponential Thermal Boundary Condition on Unsteady Magnetohydrodynamic Convection in a Square Enclosure Filled with Fe3O4- Water Ferrofluid

2018

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In this paper, magnetohydrodynamic convection is analyzed numerically for a square enclosure filled with Fe3O4-water ferrofluid. A time-dependent exponential thermal boundary condition is applied at the bottom wall of the cavity. The ferrofluid is modeled as a single-phase fluid. Maxwell-Garnet model is used for modeling the effective thermal conductivity and viscosity of the ferrofluid. The Galerkin-weighted residuals method of finite-element analysis is adopted for the numerical solutions. The solid volume fraction,  is varied from 2.5 to 10% and the Hartmann number Ha from 0 to 20. Investigations are carried out for Rayleigh number Ra =10 4 and 10 5 over dimensionless times τ=0.01-1.0. The present study indicates that Ra, Ha and , have a significant effect on heat transfer. At τ =1, if Ra=10 4 , a higher solid volume fraction maximizes heat transfer whereas at Ra=10 5 , a lower solid volume fraction maximizes heat transfer. Moreover, at τ =1, incrementing Ha diminishes heat transfer at Ra=10 4 whereas an optimum value of Ha=10 maximizes heat transfer for Ra=10 5 . The exponential thermal boundary conditions have a certain importance on heat transfer. The present results provide necessary information for further investigation of heat transfer in its different applications.

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“…From the other side, very limited attempts are carried out of the MHD natural convection in open enclosures with a complex geometry and filled with nanofluid. Bakier [46] investigated numerically the natural convection in an open C-shape cavity filled with nanofluid. The results showed that heat transfer rate increased with the increment of nanoparticles at low Rayleigh number.…”

Section: Introductionmentioning

confidence: 99%

MHD Natural Convection in a Fully Opened Parallelogrammic Enclosure Filled with Copper–Water Nanofluid and Partially Heated from its Left Sidewall

Ghani

Khammas

Mustafa

et al. 2020

ARFMTS

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The present work examined numerically for the first time, the magneto-hydrodynamics (MHD) natural convection flow and heat transfer in a fully opened parallelogrammic enclosure filled with copper-water nanofluid and subjected to a straight magnetic field. Both the upper and lower inclined walls of the enclosure are kept cold, while its right sidewall is considered fully opened to the environment. The left sidewall of the enclosure is heated partially, while the remaining parts of it are considered thermally insulated. The ranges of this study are, Hartmann number (0  Ha  75), nondimensional heat source location (0.25    0.75), Rayleigh number (10 4  Ra  10 6), solid volume fraction (=0.04), and the inclination angle of the upper and the lower walls (-60°    60°). The non-dimensional heat source length is considered fixed at [ = 0.25]. For all Hartmann numbers, It was found that for [Ra =10 6 ] , the maximum

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Flow in open C-shaped cavities: How far does the change in boundaries affect nanofluid?

Cited by 18 publications

References 24 publications

Effects of cavity and heat source aspect ratios on natural convection of a nanofluid in a C-shaped cavity using Lattice Boltzmann method

Effects of cavity and heat source aspect ratios on natural convection of a nanofluid in a C-shaped cavity using Lattice Boltzmann method

Study of Exponential Thermal Boundary Condition on Unsteady Magnetohydrodynamic Convection in a Square Enclosure Filled with Fe3O4- Water Ferrofluid

MHD Natural Convection in a Fully Opened Parallelogrammic Enclosure Filled with Copper–Water Nanofluid and Partially Heated from its Left Sidewall

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