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首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >Oscillation behaviors of oil droplets adhered on the solid surfaces with different wettability in a laminar flow field
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Oscillation behaviors of oil droplets adhered on the solid surfaces with different wettability in a laminar flow field

机译：在层流场中具有不同润湿性的固体表面上粘附的油滴的振动行为

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摘要

The oscillation of oil droplets on surfaces with different wettability in laminar flow field affected the initial movement behaviors of oil droplets, which was studied experimentally and theoretically in the paper. In the initial oscillation stage, the contact line of the oil drop on the substrate did not move, while the center mass and contact angle hysteresis of the droplet have changed. It was found that there were two oscillation patterns for adhered oil drop in the flow water, one was the up-down oscillation, the other was left-right oscillation, which can be transformed into each other. The contact angle evolution of oscillating oil drop was analyzed. It was found that with the increase of water flow velocity, the difference between the maximum and minimum contact angles of adhered oil drops on different surfaces was increasing, and the contact angle of oil drops on oleophobic surfaces underwater was more likely to exceed the advancing contact angle during the oscillation process. The force analysis of the three-phase contact point of the oil drop on the surfaces was carried out, and the oscillation behaviors of the oil drop were explained theoretically. The sensitivity analysis of the factors affecting the oil drop oscillation behaviors was carried out, and the influences of the oil drop height and the surface wettability on the oil drop oscillation frequency and amplitude was obtained.
机译：在层流场中具有不同润湿性的表面振荡影响了油滴的初始运动行为，在实验和理论上在纸上进行了研究。在初始振荡阶段，基板上的油滴的接触线不会移动，而液滴的中心质量和接触角滞后已经改变。结果发现，流水中的粘附油滴有两种振荡模式，一个是上下振荡，另一个是左右振荡，可以彼此转化。分析了振荡油滴的接触角演变。发现随着水流速的增加，粘附油滴在不同表面上的最大和最小接触角之间的差异增加，并且油滴在水下的油滴在疏水表面上的接触角更可能超过前进接触振荡过程中的角度。进行了表面上的油滴三相接触点的力分析，从理论上解释了油滴的振荡行为。实施了影响油滴振荡行为的因素的灵敏度分析，获得了油滴高度的影响和对油滴振荡频率和振幅的影响。

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