Entropy Generation in MHD Natural Convection Within Curved Enclosure Filled with Cu-Water Nanofluid

被引：7

作者：

Mahapatra, T. R. ^{[1
]}

Parveen, Rujda ^{[1
]}

机构：

[1] Visva Bharati, Dept Math, Inst Sci, Santini Ketan 731235, W Bengal, India

来源：

JOURNAL OF NANOFLUIDS | 2019年 / 8卷 / 05期

关键词：

Natural Convection; Complex Enclosure; Magnetohydrodynamics; Nanofluid; Entropy Generation; LID-DRIVEN CAVITY; LATTICE BOLTZMANN SIMULATION; MAGNETIC-FIELD; HEAT-TRANSFER; MIXED CONVECTION; SQUARE CAVITY; WALLS;

D O I：

10.1166/jon.2019.1646

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

An analysis of natural convection flow in a differentially heated enclosure having a sinusoidal upper wall filled with Cu-water nanofluid under the influence of constant vertical magnetic field has been performed numerically. The results are analyzed for various combinations of Rayleigh number (10(2) <= Ra <= 10(4)), amplitude of the sinusoidal wall (0 <= a <= 0.4), volume fraction of nanoparticles (0.0 <= phi <= 0.2) and Hartmann number (0 <= Ha <= 50). Numerical simulations have been presented in the form of streamlines (psi), isotherms (theta), entropy generation due to heat transfer (S-theta), fluid friction (S-psi), magnetic field (S-m) and average Nusselt number (Nu(avg)). It has been observed that the presence of magnetic field and nanofluid strongly affects the flow behaviour and heat transfer rate inside the enclosure. Heat transfer rate rises with surge in Rayleigh number and attenuates with increase in amplitude of the wavy wall.

引用

页码：1051 / 1065

页数：15

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