中国物理B ›› 2024, Vol. 33 ›› Issue (6): 64702-064702.doi: 10.1088/1674-1056/ad3b7f

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On the spreading behavior of a droplet on a circular cylinder using the lattice Boltzmann method

Fan Yang(杨帆)1,2,†, Hu Jin(金虎)1, and Mengyao Dai(戴梦瑶)1   

  1. 1 School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;
    2 Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, Shanghai 200093, China
  • 收稿日期:2023-12-12 修回日期:2024-03-08 接受日期:2024-04-07 出版日期:2024-06-18 发布日期:2024-06-18
  • 通讯作者: Fan Yang E-mail:usstyf@126.com

On the spreading behavior of a droplet on a circular cylinder using the lattice Boltzmann method

Fan Yang(杨帆)1,2,†, Hu Jin(金虎)1, and Mengyao Dai(戴梦瑶)1   

  1. 1 School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;
    2 Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, Shanghai 200093, China
  • Received:2023-12-12 Revised:2024-03-08 Accepted:2024-04-07 Online:2024-06-18 Published:2024-06-18
  • Contact: Fan Yang E-mail:usstyf@126.com

摘要: The study of a droplet spreading on a circular cylinder under gravity was carried out using the pseudo-potential lattice Boltzmann high-density ratios multiphase model with a non-ideal Peng-Robinson equation of state. The calculation results indicate that the motion of the droplet on the cylinder can be divided into three stages: spreading, sliding, and aggregating. The contact length and contact time of a droplet on a cylindrical surface can be affected by factors such as the wettability gradient of the cylindrical wall, the Bond number, and droplet size. Furthermore, phase diagrams showing the relationship between Bond number, cylinder wall wettability gradient, and contact time as well as maximum contact length for three different droplet sizes are given. A theoretical foundation for additional research into the heat and mass transfer process between the droplet and the cylinder can be established by comprehending the variable rules of maximum contact length and contact time.

关键词: lattice Boltzmann methods, droplet, circular cylinder, wettability gradient

Abstract: The study of a droplet spreading on a circular cylinder under gravity was carried out using the pseudo-potential lattice Boltzmann high-density ratios multiphase model with a non-ideal Peng-Robinson equation of state. The calculation results indicate that the motion of the droplet on the cylinder can be divided into three stages: spreading, sliding, and aggregating. The contact length and contact time of a droplet on a cylindrical surface can be affected by factors such as the wettability gradient of the cylindrical wall, the Bond number, and droplet size. Furthermore, phase diagrams showing the relationship between Bond number, cylinder wall wettability gradient, and contact time as well as maximum contact length for three different droplet sizes are given. A theoretical foundation for additional research into the heat and mass transfer process between the droplet and the cylinder can be established by comprehending the variable rules of maximum contact length and contact time.

Key words: lattice Boltzmann methods, droplet, circular cylinder, wettability gradient

中图分类号:  (Multiphase flows)

  • 47.61.Jd
61.30.Pq (Microconfined liquid crystals: droplets, cylinders, randomly confined liquid crystals, polymer dispersed liquid crystals, and porous systems) 47.11.Qr (Lattice gas) 02.60.Cb (Numerical simulation; solution of equations)