中国物理B ›› 2021, Vol. 30 ›› Issue (7): 75101-075101.doi: 10.1088/1674-1056/abf351

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Effect of the particle temperature on lift force of nanoparticle in a shear rarefied flow

Jun-Jie Su(苏俊杰), Jun Wang(王军), and Guo-Dong Xia(夏国栋)   

  1. MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Beijing Key Laboratory of Heat Transfer and Energy Conversion, Beijing University of Technology, Beijing 100124, China
  • 收稿日期:2021-02-23 修回日期:2021-03-22 接受日期:2021-03-30 出版日期:2021-06-22 发布日期:2021-06-30
  • 通讯作者: Jun Wang E-mail:jwang@bjut.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 51776007), Beijing Nova Program of Science and Technology (Grant No. Z191100001119033), and the Youth Talent Support Program of Beijing Municipal Education Committee (Grant No. CIT&TCD201904015).

Effect of the particle temperature on lift force of nanoparticle in a shear rarefied flow

Jun-Jie Su(苏俊杰), Jun Wang(王军), and Guo-Dong Xia(夏国栋)   

  1. MOE Key Laboratory of Enhanced Heat Transfer and Energy Conservation, Beijing Key Laboratory of Heat Transfer and Energy Conversion, Beijing University of Technology, Beijing 100124, China
  • Received:2021-02-23 Revised:2021-03-22 Accepted:2021-03-30 Online:2021-06-22 Published:2021-06-30
  • Contact: Jun Wang E-mail:jwang@bjut.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 51776007), Beijing Nova Program of Science and Technology (Grant No. Z191100001119033), and the Youth Talent Support Program of Beijing Municipal Education Committee (Grant No. CIT&TCD201904015).

摘要: The nanoparticles suspended in a shear flow are subjected to a shear lift force, which is of great importance for the nanoparticle transport. In previous theoretical analysis on the shear lift, it is usually assumed that the particle temperature is equal to the temperature of the surrounding gas media. However, in some particular applications, the particle temperature can significantly differ from the gas temperature. In the present study, the effect of particle temperature on the shear lift of nanoparticles is investigated and the corresponding formulas of shear lift force are derived based on the gas kinetic theory. For extremely small nanoparticles (with radius R<2 nm) or large nanoparticles (R>20 nm), the influence of the particle temperature can be neglected. For the intermediate particle size, the relative error induced by the equal gas-particle temperature can be significant. Our findings can bring an insight into accurate evaluation of the nanoparticle transport properties.

关键词: shear lift force, nanoparticle, temperature effect, gas kinetic theory

Abstract: The nanoparticles suspended in a shear flow are subjected to a shear lift force, which is of great importance for the nanoparticle transport. In previous theoretical analysis on the shear lift, it is usually assumed that the particle temperature is equal to the temperature of the surrounding gas media. However, in some particular applications, the particle temperature can significantly differ from the gas temperature. In the present study, the effect of particle temperature on the shear lift of nanoparticles is investigated and the corresponding formulas of shear lift force are derived based on the gas kinetic theory. For extremely small nanoparticles (with radius R<2 nm) or large nanoparticles (R>20 nm), the influence of the particle temperature can be neglected. For the intermediate particle size, the relative error induced by the equal gas-particle temperature can be significant. Our findings can bring an insight into accurate evaluation of the nanoparticle transport properties.

Key words: shear lift force, nanoparticle, temperature effect, gas kinetic theory

中图分类号:  (Kinetic and transport theory of gases)

  • 51.10.+y
34.20.-b (Interatomic and intermolecular potentials and forces, potential energy surfaces for collisions) 47.45.Dt (Free molecular flows)