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首页> 外文期刊>International Journal of Heat and Mass Transfer >Experimental investigation on effect of ultrasonication duration on colloidal dispersion and thermophysical properties of alumina-water nanofluid
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Experimental investigation on effect of ultrasonication duration on colloidal dispersion and thermophysical properties of alumina-water nanofluid

机译：超声持续时间对氧化铝-水纳米流体胶体分散和热物理性质影响的实验研究

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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 Al_2O_3-water nanofluid. A horn ultrasonic dismembrator was used for different periods from 0 h 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℃ to 50 ℃. 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.
机译：自从引入纳米流体以来已经过去了二十年，希望它可以增强传热应用的热性能。然而，目前还没有纳米流体制备过程的标准（超声发生器的类型，功率，振幅，持续时间）以实现稳定且分散良好的纳米流体。这项研究的目的是分析超声波持续时间对0.5vol。％的Al_2O_3-水纳米流体的胶体分散和热物理性质的影响。喇叭形超声分散器在0h到5h的不同时间内用于纳米流体的制备。研究了粒度分布（PSD），ζ电位和微结构，以检查分散特性。在10℃至50℃的不同温度下分析了纳米流体的热导率，粘度和密度。随着超声处理时间的增加，观察到更好的分散性，更高的导热率和密度以及更低的粘度。此外，发现随着温度的升高，导热系数增加，但粘度和密度降低。研究得出结论，超声持续时间越长越好，并且至少需要2小时的超声处理才能使纳米流体性能更好。

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  • 作者

    I.M. Mahbubul; I.M. Shahrul; S.S. Khaleduzzaman; R. Saidur; M.A. Amalina; A. Turgut;

  • 作者单位

    Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia;

    Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia;

    Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia;

    Center of Research Excellence in Renewable Energy (CoRE-RE), King Fahd University of Petroleum and Minerals (KFUPM), Dhahran 31261, Saudi Arabia;

    Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia;

    Mechanical Engineering Department, Dokuz Eylul University, 35397 Buca Izmir, Turkey;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Nanofluid; Ultrasonic vibration; Colloidal dispersion; Thermal conductivity; Viscosity; Density;

    机译：纳米流体超声波振动;胶体分散体;导热系数;粘度;密度;

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