液滴碰撞超疏水表面上附着不相溶液滴机理研究

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (14) : 80-90.

论文

液滴碰撞超疏水表面上附着不相溶液滴机理研究

廖斌，张龙飞，卜洋，李旋旋，林欣，汪超，陈善群

作者信息 +

Mechanism of a drop impact on an another immiscible one sitting on the superhydrophobic surface

LIAO Bin，ZHANG Longfei，BU Yang，LI Xuanxuan，LIN Xin，WANG Chao，CHEN Shanqun

Author information +

文章历史 +

摘要

以数值模拟为主要手段对液滴碰撞超疏水表面上附着不相溶液滴演变过程及内在机理进行了系统性的研究工作。首先，发掘出附着模式、弹开I模式以及弹开II模式等三种液滴碰撞的典型演变模式；其次，从能量角度揭示了Weber数（We）、Bond数（Bo）以及Ohnesorg数（Oh）等无量纲参数对于液滴碰撞动力学行为的影响规律；最后，建立了液滴碰撞典型演变模式与We、Bo、Oh等无量纲参数的依赖关系图谱。结果表明，碰撞液滴之间的能量传递、转换以及粘性耗散直接影响液滴碰撞的动力学行为；随着Oh的减小、Bo的减小以及We的增大，液滴碰撞典型演变模式出现从附着模式到弹开模式的转捩；We-Oh对液滴碰撞典型演变模式的影响规律与We-Bo近乎一致。

Abstract

In this paper, the evolution of a drop impact on an another immiscible one sitting on the superhydrophobic surface were systematically studied as well as the intrinsic mechanism. Three typical evolution patterns of drop collision, such as attachment mode, bounce-off I mode, and bounce-off II mode, were verified by the numerical simulations. Based on the energy budget, the influence of Weber number (We), Bond number (Bo), and Ohnesorg number (Oh) on the dynamical behaviors of drop collision was revealed. In addition, the regime maps of typical evolution patterns of drop collision with the above dimensionless parameters were established. It was found that energy transfer, conversion, and viscous dissipation between the colliding drops directly affect the dynamical behaviors of drop collision. With the decrease of Oh, the decrease of Bo, and the increase of We, the typical evolution pattern of drop collision shows a transition from the attachment mode to the bounce-off mode. Finally, the influence law of We-Oh on the typical evolution pattern of drop collision is approximately the same as We-Bo.

导出引用

廖斌, 张龙飞, 卜洋, 李旋旋, 林欣, 汪超, 陈善群. 液滴碰撞超疏水表面上附着不相溶液滴机理研究[J]. 振动与冲击, 2024, 43(14): 80-90

LIAO Bin, ZHANG Longfei, BU Yang, LI Xuanxuan, LIN Xin, WANG Chao, CHEN Shanqun. Mechanism of a drop impact on an another immiscible one sitting on the superhydrophobic surface[J]. Journal of Vibration and Shock, 2024, 43(14): 80-90

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