Numerical investigation of MHD effects on Al2O3–water nanofluid flow and heat transfer in a semi-annulus enclosure using LBM

Sheikholeslami, M.; Gorji-Bandpy, M.; Ganji, D.D.

doi:10.1016/j.energy.2013.07.070

Cited by 299 publications

(82 citation statements)

References 40 publications

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“…Ellahi [9] studied magneto-hydrodynamic (MHD) flow of non-Newtonian nanofluid in a pipe and observed that the MHD parameter decreases the fluid motion and the velocity profile is larger than that of the temperature profile even in the presence of variable viscosities. Free convection heat transfer in a concentric annulus between a cold square and heated elliptic cylinders in the presence of a magnetic field was investigated by Sheikholeslami et al [10]. They found that enhancement in heat transfer increases as the Hartmann number increases but it decreases with increase of Rayleigh number.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Natural Convection Flow in a Trapezoidal Cavity Containing a Rectangular Heated Body in Presence of External Oriented Magnetic Field

Akter

Parvin

2018

J. Sci. Res.

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The laminar natural convection flow and heat transfer inside a trapezoidal cavity filled with air and containing a rectangular block is investigated numerically. The left and right walls of the cavity are cold, the top and bottom walls are adiabatic and the rectangular body is heated uniformly. Finite Element Method of Galerkin's weighted residual scheme is used to solve the transport equations with appropriate boundary conditions. The main objective of this study is to explore the influence of pertinent parameters such as Rayleigh number ( ), Hartmann number (Ha) and orientation of the magnetic field () on the flow and heat transfer performance of the fluid while the Prandtl number ( ) is considered fixed. Results indicate that the heat transfer rate is significantly affected by increasing the mentioned parameters.

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Section: Introductionmentioning

confidence: 99%

Analysis of Natural Convection Flow in a Trapezoidal Cavity Containing a Rectangular Heated Body in Presence of External Oriented Magnetic Field

Akter

Parvin

2018

J. Sci. Res.

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“…The effective thermo-physical properties of nanofluids in the numerical simulation were defined by using the following formulas [32,33]:…”

Section: Physical Model and Mathematical Formulationmentioning

confidence: 99%

“…Different nano sized particles such as Al 2 O 3 , Cu, CuO, SO 2 , TiO 2 are added in the base fluid to enhance the thermal characteristics of the base flow [22][23][24][25][26][27][28][29]. Magnetohydrodynamics studies with added nanoparticles to the base fluids were received attention during recent years in various heat transfer applications [30][31][32][33][34]. Ghasemi et al [31] investigated the MHD free convection in a cavity filled with H 2 O-Al 2 O 3 nanofluid.…”

Section: Introductionmentioning

confidence: 99%

Natural Convection and Entropy Generation in Nanofluid Filled Entrapped Trapezoidal Cavities under the Influence of Magnetic Field

Selimefendigil

Öztop

Abu‐Hamdeh

2016

Entropy

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Abstract:In this article, entropy generation due to natural convection in entrapped trapezoidal cavities filled with nanofluid under the influence of magnetic field was numerically investigated. The upper (lower) enclosure is filled with CuO-water (Al 2 O 3 -water) nanofluid. The top and bottom horizontal walls of the trapezoidal enclosures are maintained at constant hot temperature while other inclined walls of the enclosures are at constant cold temperature. Different combinations of Hartmann numbers are imposed on the upper and lower trapezoidal cavities. Numerical simulations are conducted for different values of Rayleigh numbers, Hartmann number and solid volume fraction of the nanofluid by using the finite element method. In the upper and lower trapezoidal cavities magnetic fields with different combinations of Hartmann numbers are imposed. It is observed that the averaged heat transfer reduction with magnetic field is more pronounced at the highest value of the Rayleigh number. When there is no magnetic field in the lower cavity, the averaged Nusselt number enhances as the value of the Hartmann number of the upper cavity increases. The heat transfer enhancement rates with nanofluids which are in the range of 10% and 12% are not affected by the presence of the magnetic field. Second law analysis of the system for various values of Hartmann number and nanoparticle volume fractions of upper and lower trapezoidal domains is performed.

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“…Recently effect of using micropolar fluid, nanofluid, etc. on flow and heat transfer has been studied by several authors [8][9][10][11][12][13][14][15] . Nanofluid is prepared by mixing nano sized particles in a fluid.…”

Section: Introductionmentioning

confidence: 99%

MHD boundary layer stagnation point flow of non-Newtonian Micropolar Nanofluid flow over a permeable vertical plate with chemical reaction effects

Jagadha¹,

Kishan²

2017

jusps-A

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The paper presents an investigation of the influence of chemical reaction on steady mixed convection MHD flow of Non-Newtonian micropolar nanofluid past a permeable vertical plate. The effect of Thermophoresis parameter and Brownian motion parameter are incorporated in the energy equation and concentration equation. The governing partial differential equations are converted into a system of ordinary differential equations using similarity transformations. The sysyem of linear equations are solved by using the implicit finite difference method. The effect of different parameters on the dimensionless velocity, temperature and concentration are shown graphically and analyzed. The effect of physical parameters such as material parameter K, suction parameter A, Prandtl number Pr, radiation parameter R, thermophoresis parameter Nt, Brownian motion parameter Nb, chemical reaction parameter  and magnetic parameter Ha are also being numerically investigated and analyzed.

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Numerical investigation of MHD effects on Al2O3–water nanofluid flow and heat transfer in a semi-annulus enclosure using LBM

Cited by 299 publications

References 40 publications

Analysis of Natural Convection Flow in a Trapezoidal Cavity Containing a Rectangular Heated Body in Presence of External Oriented Magnetic Field

Analysis of Natural Convection Flow in a Trapezoidal Cavity Containing a Rectangular Heated Body in Presence of External Oriented Magnetic Field

Natural Convection and Entropy Generation in Nanofluid Filled Entrapped Trapezoidal Cavities under the Influence of Magnetic Field

MHD boundary layer stagnation point flow of non-Newtonian Micropolar Nanofluid flow over a permeable vertical plate with chemical reaction effects

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