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首页> 外文期刊>International Journal of Heat and Mass Transfer >Direct numerical simulation of thermal conductivity of nanofluids: The effect of temperature two-way coupling and coagulation of particles
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Direct numerical simulation of thermal conductivity of nanofluids: The effect of temperature two-way coupling and coagulation of particles

机译：纳米流体导热系数的直接数值模拟：温度双向耦合和颗粒凝结的影响

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摘要

An Eulerian-Lagrangian based direct numerical simulations (DNS) model was developed to investigate the effective thermal conductivity of nanofluids. A two-way coupling term to resolve the temperature interactions between the solid particles and fluid field was considered. The model also considered various forces acting on the nanoparticles. Cu/water nanofluids with 100 nm particles and Al_2O_3/water nanofluids with 80 nm particles were simulated at different volume fractions and the effective thermal conductivity of nanofluids was calculated. The present results suggest that the particle conductivity and forces acting on nanoparticle are necessary while predicting the effective thermal conductivity of nanofluids.
机译：建立了基于欧拉-拉格朗日的直接数值模拟（DNS）模型，以研究纳米流体的有效导热系数。考虑了解决固体颗粒与流场之间温度相互作用的双向耦合项。该模型还考虑了作用在纳米颗粒上的各种力。以不同的体积分数模拟了具有100 nm粒子的Cu /水纳米流体和具有80 nm粒子的Al_2O_3 /水纳米流体，并计算了纳米流体的有效热导率。目前的结果表明，在预测纳米流体的有效热导率时，颗粒电导率和作用在纳米颗粒上的力是必要的。

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  • 作者

    Sasidhar Kondaraju; E.K. Jin; Joon Sang Lee;

  • 作者单位

    Department of Mechanical Engineering, Wayne State University, 5050 Anthony Wayne Drive, Detroit, Ml 48202, USA Department of Aerospace and Mechanical Engineering, University of Arizona, 1130 N. Mountain Avenue, Tucson, AZ 85721, USA;

    Department of Atmospheric, Ocean and Earth Science, George Mason University, Fairfax, VA USA;

    Department of Mechanical Engineering, Yonsei University, Seoul, Republic of Korea;

  • 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

    nanofluids; DNS; coagulation; thermal conductivity; two-way coupling;

    机译：纳米流体DNS;凝结;导热系数;双向耦合;

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