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首页> 外文期刊>Heat transfer >Effect of ball milling on the thermal conductivity and viscosity of Indian coal fly ash nanofluid
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Effect of ball milling on the thermal conductivity and viscosity of Indian coal fly ash nanofluid

机译：球磨对印度煤粉煤灰纳米流体导热率和粘度的影响

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摘要

The present study investigates the effect of ball milling on thermal conductivity and viscosity of stable nanofluid of fly ash from Indian coal. The particle size of fly ash decreased from micron size to 89, 55.5, and 11.5 nm with reduction by 55， 90, and 434 times, respectively, due to ball milling for 30, 40， and 60 hours. The surfactant Triton X-100 was used to attain stability of 0.1% and 0.5% volume concentration of fly ash nanofluid. The samples were characterized by using scanning electron microscopy, dynamic light scattering, and zeta potential analysis. The outcome reveals that the thermal conductivity of fly ash nanofluid increases with temperature, volume concentration, and reduction in particle size. A maximum enhancement in thermal conductivity of 11.9% with 11.5-nm nanofluid sample and 5.4% with 89-nm nanofluid sample for 0.5% concentration at 60°C is observed. The viscosity of fly ash nanofluid increases with concentration and varies inversely with particle size and temperature. A difference of 1.6% in viscosity is observed between the values obtained with 11.5 and 89 nm nanofluid samples for 0.5% concentration at 30°C.
机译：本研究调查了球磨对印度煤中粉煤灰稳定纳米流体的热导电性和粘度的影响。粉煤灰的粒度从微米尺寸降至89,55.5和11.5nm，分别减少55,90和434次，由于球磨为30,40和60小时。表面活性剂Triton X-100用于获得0.1％和0.5％粉煤灰纳米流体的稳定性。通过使用扫描电子显微镜，动态光散射和Zeta电位分析来表征样品。结果表明，粉煤灰纳米流体的导热率随温度，体积浓度和粒度的降低而增加。在11.5nm纳米流体样品中，热电导率的最大增强为11.9％，含有89nm纳米流体样品的5.4％，在60℃下浓度为0.5％浓度。粉煤灰纳米流体的粘度随浓度的增加，颗粒尺寸和温度变化。在用11.5和89nm纳米流体样品获得的值下，在30℃下浓度为0.5％浓度，观察到粘度的差异为1.6％。

著录项

  • 来源
    《Heat transfer》 |2020年第8期|4475-4490|共16页
  • 作者

    Praveen Kanti; K. V. Sharma; C. G. Ramachandra; Alina Adriana Minea;

  • 作者单位

    Department of Mechanical Engineering Jyothy Institute of Technology Bangalore India;

    Department of Mechanical Engineering Center for Energy Studies JNTUH College of Engineering Kukatpally India;

    Department of Mechanical Engineering Presidency University Bangalore India;

    Faculty of Materials Science and Engineering Gheorghe Asachi Technical University Iasi Romania;

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

    fly ash nanofluid; heat transfer; stability; thermophysical properties;

    机译：粉煤灰纳米流体;传播热量;稳定;热物理性质;

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