Lattice Boltzmann simulation of magnetohydrodynamic natural convection heat transfer of Al2O3-water nanofluid in a horizontal cylindrical enclosure with an inner triangular cylinder

    Authors

    M. Sheikholeslami; M. Gorji-Bandpy;K. Vajravelu

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    Abbreviated Journal Title

    Int. J. Heat Mass Transf.

    Keywords

    Lattice Boltzmann method; Nanofluid; Brownian motion; Magnetic field; Natural convection; Triangular cylinder; DAY BOUNDARY-CONDITIONS; ROTATING POROUS DISK; MAGNETIC-FIELD; NUMERICAL-SIMULATION; MASS-TRANSFER; THERMAL-CONDUCTIVITY; VISCOUS; DISSIPATION; ENTROPY GENERATION; VARIABLE VISCOSITY; PERISTALTIC FLOW; Thermodynamics; Engineering, Mechanical; Mechanics

    Abstract

    In this study the lattice Boltzmann method is applied to investigate the effect of magnetic field on natural convection heat transfer of Al2O3-water nanofluid in a two-dimensional horizontal annulus. In this model, the effect of Brownian motion on the effective thermal conductivity is also considered. The effective thermal conductivity and the effective viscosity of nanofluid are calculated by KKL (Koo-Kleinstreuer-Li) correlation. The effect of nanoparticle volume fraction for the enhancement of heat transfer was examined for several sets of values of Rayleigh and Hartmann numbers. Also, a correlation of the Nusselt number with physical parameters is presented. The obtained results indicate that the value of the maximum stream function decreases with increasing Hartmann number. Furthermore, we notice that the Nusselt number has a direct relationship with the Rayleigh number: but quite the opposite is true with the Hartmann number. The obtained results indicate that the Lattice Boltzmann method with double-population is a powerful approach for the simulation of natural convection heat transfer in nanofluids in regions with curved boundaries. (C) 2014 Elsevier Ltd. All rights reserved.

    Journal Title

    International Journal of Heat and Mass Transfer

    Volume

    80

    Publication Date

    1-1-2015

    Document Type

    Article

    Language

    English

    First Page

    16

    Last Page

    25

    WOS Identifier

    WOS:000345202100003

    ISSN

    0017-9310

    Share

    COinS