Natural convection enhancement in a porous cavity with Al2O3-Ethylene glycol/water nanofluids

被引：41

作者：

Solomon, A. Brusly ^{[1
]}

Sharifpur, M. ^{[1
]}

Ottermann, Tanja ^{[1
]}

Grobler, Carla ^{[1
]}

Joubert, Michael ^{[1
]}

Meyer, Josua P. ^{[1
]}

机构：

[1] Univ Pretoria, Dept Mech & Aeronaut Engn, ZA-0002 Pretoria, South Africa

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2017年 / 108卷

关键词：

Natural convection; Porous cavity; nanofluids; Nusselt number; Al2O3; Ethylene glycol; INDUCED MAGNETIC-FIELD; HEAT-TRANSFER; THERMAL-CONDUCTIVITY; AL2O3-WATER NANOFLUID; CARBON NANOTUBES; PERISTALTIC FLOW; BROWNIAN-MOTION; NANOPARTICLES; FLUID; WATER;

D O I：

10.1016/j.ijheatmasstransfer.2017.01.009

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The natural convection heat transfer of a differentially heated cavity filled with porous material and saturated with nanofluid is studied. The nanofluid used in the present study contains 60% Ethylene glycol, 40% DI-water and 30 nm size Al2O3 nanoparticles. The volume concentration of nanofluid used is in the range of 0.05% <= phi <= 0.4%. The range of Rayleigh number in the present study is 1.2 x 10(8) <= Ra <= 4 x 10(8) for clear cavity and 3 x 10(3) <= Ra <= 1.3 x 10(4) for the porous cavity. Viscosity of the nanofluid is also measured at volume concentration of 0.05% and found one available model works for the calculations. In order to explain the heat transfer behaviour of the present system, heat transferred by both clear and porous cavity, heat transfer coefficients of both hot and cold wall, as well as Nusselt number variation with concentrations of nanofluids are presented. It is found that the performance of porous cavity filled with a nanofluid volume concentration of 0.05% is enhanced while the other concentrations of nanofluids deteriorate the performance. At a volume concentration of 0.05%, the heat transfer capability of porous cavity is enhanced to a maximum of 10% compared to the base fluids. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：1324 / 1334

页数：11

共 42 条

[1] Copper oxide nanoparticles analysis with water as base fluid for peristaltic flow in permeable tube with heat transfer [J].

Akbar, Noreen Sher ;

Raza, M. ;

Ellahi, R. .

COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE, 2016, 130 :22-30

[2] Impulsion of induced magnetic field for Brownian motion of nanoparticles in peristalsis [J].

Akbar, Noreen Sher ;

Raza, M. ;

Ellahi, R. .

APPLIED NANOSCIENCE, 2016, 6 (03) :359-370

[3] Influence of induced magnetic field and heaat flux with the suspension of carbon nanotubes for the peristaltic flow in a permeable channel [J].

Akbar, Noreen Sher ;

Raza, M. ;

Ellahi, R. .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2015, 381 :405-415

[4]

American Society of Heating Refrigerating and Air-Conditioning Engineers, 2009, ASHRAE HDB FUND

[5]

[Anonymous], J MECH ENG SCI

[6] A Review of Thermal Conductivity Models for Nanofluids [J].

Aybar, Hikmet S. ;

Sharifpur, Mohsen ;

Azizian, M. Reza ;

Mehrabi, Mehdi ;

Meyer, Josua P. .

HEAT TRANSFER ENGINEERING, 2015, 36 (13) :1085-1110

[7] Simulation of Solid Particles Behavior in a Heated Cavity at High Rayleigh Numbers [J].

Bagheri, G. H. ;

Salmanzadeh, M. ;

Golkarfard, V. ;

Ahmadi, G. .

AEROSOL SCIENCE AND TECHNOLOGY, 2012, 46 (12) :1382-1391

[8]

Berkovsky B., 1977, P INT TURB BUOYANT C

[9] Heat transfer and natural convection of nanofluids in porous media [J].

Bourantas, G. C. ;

Skouras, E. D. ;

Loukopoulos, V. C. ;

Burganos, V. N. .

EUROPEAN JOURNAL OF MECHANICS B-FLUIDS, 2014, 43 :45-56

[10] Convective transport in nanofluids [J].

Buongiorno, J .

JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, 2006, 128 (03) :240-250

← 1 2 3 4 5 →