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

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (14) : 80-90.

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

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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.

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interface / drop collision / dimensionless parameters / energy / superhydrophobic surface

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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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