The onset of MHD nanofluid convection with Hall current effect

被引:53
作者
Yadav, Dhananjay [1 ]
Lee, Jinho [1 ]
机构
[1] Yonsei Univ, Sch Mech Engn, Seoul 120749, South Korea
来源
EUROPEAN PHYSICAL JOURNAL PLUS | 2015年 / 130卷 / 08期
关键词
THERMAL-INSTABILITY; BRINKMAN CONVECTION; NATURAL-CONVECTION; MAGNETIC-FIELD; POROUS-MEDIUM; LAYER; FLOW; NONEQUILIBRIUM; NANOPARTICLES; BOUNDARY;
D O I
10.1140/epjp/i2015-15162-9
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
In this paper, the combined effects of Hall current and magnetic field on the onset of convection ill an electrically conducting nanofluid layer heated from below is investigated. A physically more realistic boundary condition on the nanoparticle volume fraction is taken i.e. the nanoparticle flux is assumed to be zero rather than prescribing a nanoparticle volume fraction on the rigid impermeable boundaries. The employed model incorporates the effects of Brownian motion and thermophoresis. The resulting eigenvalue problem is solved using the Galerkin method. The results obtained during the analysis are presented graphically for an alumina-water rianolluid. It is observed that the effect of smaller values of the Hall current parameter and the nanoparticle parameters accelerate the onset of convection, while larger values of the Hall current parameter (>= 15) have no effect on the system stabilities.
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页数:22
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