Experimental investigation on effect of ultrasonication duration on colloidal dispersion and thermophysical properties of alumina-water nanofluid

被引：90

作者：

Mahbubul, I. M. ^{[1
]}

Shahrul, I. M. ^{[1
]}

Khaleduzzaman, S. S. ^{[1
]}

Saidur, R. ^{[2
]}

Amalina, M. A. ^{[1
]}

Turgut, A. ^{[3
]}

机构：

[1] Univ Malaya, Fac Engn, Dept Mech Engn, Kuala Lumpur 50603, Malaysia

[2] King Fahd Univ Petr & Minerals, Ctr Res Excellence Renewable Energy CoRE RE, Dhahran 31261, Saudi Arabia

[3] Dokuz Eylul Univ, Dept Mech Engn, TR-35397 Buca Izmir, Turkey

来源：

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2015年 / 88卷

关键词：

Nanofluid; Ultrasonic vibration; Colloidal dispersion; Thermal conductivity; Viscosity; Density; HEAT-TRANSFER PERFORMANCE; THERMAL-CONDUCTIVITIES; VISCOSITY; SONICATION; ZNO;

D O I：

10.1016/j.ijheatmasstransfer.2015.04.048

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Two decades have been going on since nanofluid was introduced with the hope that it could enhance the thermal performances of heat transfer applications. Nevertheless, yet, there are no standards for nanofluid preparation process (sonicator type, power, amplitude, duration) to achieve stable and well-dispersed nanofluid. The aim of this research is to analyze the consequence of ultrasonication duration on colloidal dispersion and thermophysical properties of 0.5 vol.% of Al2O3-water nanofluid. A horn ultrasonic dismembrator was used for different periods from Oh to 5 h for nanofluid preparation. Particle size distribution (PSD), zeta potential, and microstructure were studied to check the dispersion characteristics. Thermal conductivity, viscosity, and density of the nanofluid were analyzed for different temperatures from 10 degrees C to 50 degrees C. Better dispersion, higher thermal conductivity and density, and lower viscosity have been observed with the increase of sonication time. Furthermore, thermal conductivity was found to be increased but viscosity and density were decreased with the increase of temperature. The research concluded that higher ultrasonication duration is best and at least 2 h of ultrasonication is needed for better performance of the nanofluid. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：73 / 81

页数：9

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