Affiliations: [a] Department of Mechanical Engineering, Jouybar Branch,
Islamic Azad University, Jouybar, Iran | [b] Department of Mechanical Engineering, Najaf Abad
Branch, Islamic Azad University, Isfahan, Iran
Correspondence:
[*]
Corresponding author: Ariyan Zare Ghadi, Department of
Mechanical Engineering, Jouybar Branch, Islamic Azad University, Jouybar,
35131-19111, Iran. Tel.: +98 9358422683; Fax: +98 2313354122; E-mail:
zare.mech@yahoo.com
Abstract: In this research, effects of adding nano-sized particles to base
fluid on heat transfer and fluid flow in a lid-driven cavity in presence of
magnetic field has been numerically analyzed. In the present work, nano-sized
additives are alumina nanoparticles which play controlling role in the
adjustment of heat transfer performance and fluid motion behavior for an
application which is under a variable strength magnetic field. Since a fairly
low value of volume fraction is assumed in this research, nanoparticles
together with the base fluid behave like a new fluid. Top moving lid and bottom
walls of cavity are insulated, whereas left and right walls are defined as hot
and cold sources, respectively. Relevant parameters in the present article are
Reynolds number, considered to be 100, Prandtl number, assumed to be 6.2,
Rayleigh number (10^{2} < Gr <
10^{5}), volume fraction number (0 < φ 0.05)
and Hartmann number (0 < Ha < 50). Results are presented in form of
streamlines, isotherms, local and average Nusselt numbers.
