Entropy generation analysis of nanofluid flow over a spherical heat source inside a channel with sudden expansion and contraction

被引：63

作者：

Nouri, Davoud ^{[1
]}

Pasandideh-Fard, Mohammad ^{[1
]}

Oboodi, Mohammad Javad ^{[2
]}

Mahian, Omid ^{[3
,4
]}

Sahin, Ahmet Z. ^{[5
]}

机构：

[1] Ferdowsi Univ Mashhad, Dept Mech Engn, Mashhad, Iran

[2] Univ Tehran, Fac New Sci & Technol, Tehran, Iran

[3] Ferdowsi Univ Mashhad, Ctr Adv Technol, Mashhad, Iran

[4] King Mongkuts Univ Technol, Dept Mech Engn, Fluid Mech Thermal Engn & Multiphase Flow Res Lab, FUTURE Lab, Bangkok 10140, Thailand

[5] King Fahd Univ Petr & Minerals, Mech Engn Dept, Dhahran 31261, Saudi Arabia

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2018年 / 116卷

关键词：

Entropy generation; Nanofluid; Spherical heat source; Blockage ratio; Nanoparticle size; 2-PHASE MIXTURE MODEL; SOLAR COLLECTOR; NATURAL-CONVECTION; POROUS-MEDIA; AL2O3-WATER NANOFLUID; THERMAL-CONDUCTIVITY; TIO2-WATER NANOFLUID; WATER NANOFLUID; MAGNETIC-FIELD; WAVY-WALL;

D O I：

10.1016/j.ijheatmasstransfer.2017.09.097

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The present paper deals with entropy generation study of CuO/water nanofluid flow over a spherical heat source that is installed inside a cylindrical channel with sudden expansion and contraction. To estimate the entropy generation rate; first, the governing equations are solved numerically to find the velocity and temperature fields in the domain where the flow is steady and laminar. Next, using the simulation data, the entropy generation number is calculated theoretically. The effects of nanofluid concentration, nanoparticle size, blockage ratio, and Reynolds number on the entropy generation have been investigated. The outcomes of this research elucidate that entropy generation number rises with an increase in the nanoparticle volume fraction and surface temperature of the heat source. On the other hand, it was found that the entropy generation is diminished by implementing finer nanoparticles and lowering the blockage ratio. In this study, a new correlation has also been presented to calculate the Nusselt number that is a function of Reynolds number, Prandtl number, and blockage ratio. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：1036 / 1043

页数：8

共 44 条

[1] Entropy generation analysis of laminar flow of a nanofluid in a circular tube immersed in an isothermal external [J].

Anand, Vishal .

ENERGY, 2015, 93 :154-164

[2]

[Anonymous], 2005, ASHRAE Handbook of fundamentals

[3] Investigating non-Newtonian nanofluid flow in a narrow annulus based on second law of thermodynamics [J].

Bahiraei, Mehdi ;

Alighardashi, Masoud .

JOURNAL OF MOLECULAR LIQUIDS, 2016, 219 :117-127

[4] Viscosity of nanofluids: A review of recent experimental studies [J].

Bashirnezhad, Kazem ;

Bazri, Shahab ;

Safaei, Mohammad Reza ;

Goodarzi, Marjan ;

Dahari, Mahidzal ;

Mahian, Omid ;

Dalkilica, Ahmet Selim ;

Wongwises, Somchai .

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER, 2016, 73 :114-123

[5] Recent developments on fractal-based approaches to nanofluids and nanoparticle aggregation [J].

Cai, Jianchao ;

Hu, Xiangyun ;

Xiao, Boqi ;

Zhou, Yingfang ;

Wei, Wei .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2017, 105 :623-637

[6] Influence of magnetic field on natural convection and entropy generation in Cu-water nanofluid-filled cavity with wavy surfaces [J].

Cho, Ching-Chang .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2016, 101 :637-647

[7] Natural convection and entropy generation of Al2O3-water nanofluid in an inclined wavy-wall cavity [J].

Cho, Ching-Chang ;

Chiu, Ching-Huang ;

Lai, Chong-You .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2016, 97 :511-520

[8] Heat transfer and entropy generation in a microchannel with longitudinal vortex generators using nanofluids [J].

Ebrahimi, Amin ;

Rikhtegar, Farhad ;

Sabaghan, Amin ;

Roohi, Ehsan .

ENERGY, 2016, 101 :190-201

[9] Influences of wavy wall and nanoparticles on entropy generation over heat exchanger plat [J].

Esfahani, J. A. ;

Akbarzadeh, M. ;

Rashidi, S. ;

Rosen, M. A. ;

Ellahi, R. .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2017, 109 :1162-1171

[10] An experimental investigation on the effect of Al2O3/distilled water nanofluid on the energy efficiency of evacuated tube solar collector [J].

Ghaderian, Javad ;

Sidik, Nor Azwadi Che .

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2017, 108 :972-987

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