中国物理B ›› 2016, Vol. 25 ›› Issue (6): 66401-066401.doi: 10.1088/1674-1056/25/6/066401
• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇 下一篇
Qing-Yu Zhang(张庆宇), Dong-Ke Sun(孙东科), You-Fa Zhang(张友法), Ming-Fang Zhu(朱鸣芳)
Qing-Yu Zhang(张庆宇)1, Dong-Ke Sun(孙东科)2,3, You-Fa Zhang(张友法)1, Ming-Fang Zhu(朱鸣芳)1
摘要:
In the present study, the process of droplet condensation on superhydrophobic nanoarrays is simulated using a multi-component multi-phase lattice Boltzmann model. The results indicate that three typical nucleation modes of condensate droplets are produced by changing the geometrical parameters of nanoarrays. Droplets nucleated at the top (top-nucleation mode), or in the upside interpillar space of nanoarrays (side-nucleation mode), generate the non-wetting Cassie state, whereas the ones nucleated at the bottom corners between the nanoarrays (bottom-nucleation mode) present the wetting Wenzel state. Time evolutions of droplet pressures at the upside and downside of the liquid phase are analyzed to understand the wetting behaviors of the droplets condensed from different nucleation modes. The phenomena of droplet condensation on nanoarrays patterned with different hydrophilic and hydrophobic regions are simulated, indicating that the nucleation mode of condensate droplets can also be manipulated by modifying the local intrinsic wettability of nanoarray surface. The simulation results are compared well with the experimental observations reported in the literature.
中图分类号: (Thermodynamics studies of evaporation and condensation)