Numerical investigation of droplet impact dynamics on Janus-textured heated substrates

被引:9
|
作者
Huang, Jiangxu [1 ]
Wang, Lei [1 ]
Hu, Junjie [2 ]
机构
[1] China Univ Geosci, Sch Math & Phys, Wuhan 430074, Peoples R China
[2] China Univ Geosci, Fac Engn, Wuhan 430074, Peoples R China
基金
中国国家自然科学基金;
关键词
WATER DROPS; LEIDENFROST; SIMULATION; SURFACE; WETTABILITY; TRANSITIONS; EVAPORATION; FLOWS;
D O I
10.1063/5.0170171
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
Janus-textured substrates refer to surfaces with heterogeneous topographies, which have received particular attention recently due to their potential application in manipulating droplet-bouncing behaviors [Li et al., Nat. Phys. 12, 606-612 (2016)]. In this paper, the droplet impact dynamics on the Janus-textured heated substrates are numerically investigated with an improved thermal lattice Boltzmann method. A comprehensive parametric study is conducted by varying the wettability, the Jakob number, the Weber number, and the surface topographies. With different control parameters, three distinct boiling regimes are observed, i.e., the contact boiling regime, the transition boiling regime, and the film boiling regime (Leidenfrost state). To reveal the underlying physics, the distributions of the unbalance Young's force, the thermophoretic force, and the vapor pressure difference in the system are theoretically analyzed. As for the self-propulsion behaviors, it is find that the droplet tends to move toward the denser side (area with more pillar arrays) for the contact boiling regime. However, when the droplet is under the Leidenfrost state, its bouncing dynamics depend on the combined effects of the Weber number and the wettability, and a decrease in wettability induces the droplet to migrate toward the sparser side (area with fewer pillar arrays). These physical insights enrich the fundamental understanding of the droplet-bouncing dynamics on heated substrates and also provide guidelines for designing advanced surfaces to manipulate the droplet-bouncing behavior.
引用
收藏
页数:14
相关论文
共 50 条
  • [11] Droplet impact and Leidenfrost dynamics on a heated post
    Li, Junhui
    Weisensee, Patricia
    INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2023, 201
  • [12] The dynamics of droplet impact on a heated porous surface
    Zhao, P.
    Hargrave, G. K.
    Versteeg, H. K.
    Garner, C. P.
    Reid, B. A.
    Long, E. J.
    Zhao, H.
    CHEMICAL ENGINEERING SCIENCE, 2018, 190 : 232 - 247
  • [13] NUMERICAL INVESTIGATION OF A LIQUID DROPLET IMPINGING ON A HEATED SURFACE
    Diaz, Andres
    Ortega, Alfonso
    Anderson, Ryan
    IMECE 2009: PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION, VOL 9, PTS A-C, 2010, : 1769 - 1775
  • [14] Numerical and analytic investigation of the dynamics of hollow droplet impact onto substrate
    A. N. Cherepanov
    O. P. Solonenko
    V. V. Bublik
    Thermophysics and Aeromechanics, 2008, 15 : 631 - 641
  • [15] Numerical and analytic investigation of the dynamics of hollow droplet impact onto substrate
    Cherepanov, A. N.
    Solonenko, O. P.
    Bublik, V. V.
    THERMOPHYSICS AND AEROMECHANICS, 2008, 15 (04) : 631 - 641
  • [16] Numerical simulation of droplet impact on textured surfaces in a hybrid state
    Wang, Liwei
    Zhang, Rui
    Zhang, Xiwen
    Hao, Pengfei
    MICROFLUIDICS AND NANOFLUIDICS, 2017, 21 (04)
  • [17] Numerical simulation of droplet impact on textured surfaces in a hybrid state
    Liwei Wang
    Rui Zhang
    Xiwen Zhang
    Pengfei Hao
    Microfluidics and Nanofluidics, 2017, 21
  • [18] Numerical investigation of droplet impact and heat transfer on hot substrates under an electric field
    Xu, Haojie
    Wang, Junfeng
    Wang, Hai
    Li, Bin
    Yu, Kai
    Yao, Jiang
    Zhang, Wei
    Zuo, Lei
    INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, 2024, 229
  • [19] Infrared Thermography Investigation of an Evaporating Sessile Water Droplet on Heated Substrates
    Girard, Fabien
    Antoni, Mickael
    Sefiane, Khellil
    LANGMUIR, 2010, 26 (07) : 4576 - 4580
  • [20] Investigation on the droplet evaporation process on local heated substrates with different wettability
    Wang, Li
    Liu, Zeyu
    Wang, Xin
    Yan, Yuying
    HEAT AND MASS TRANSFER, 2024, 60 (11) : 1807 - 1819