Role of surfactant-induced Marangoni stresses in retracting liquid sheets
Role of surfactant-induced Marangoni stresses in retracting liquid sheets
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DOI：
10.1017/jfm.2022.768
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发表时间：
2022-02
影响因子：
3.7
通讯作者：
C. Constante-Amores;J. Chergui;S. Shin;D. Juric;J. Castrejón-Pita;A. A. Castrejón-Pita-A.
中科院分区：
文献类型：
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作者：
C. Constante-Amores;J. Chergui;S. Shin;D. Juric;J. Castrejón-Pita;A. A. Castrejón-Pita-A.
摘要在这项工作中，我们研究了不溶性表面活性剂对三维边缘驱动的薄水片在空气中的收缩动力学的影响。我们采用界面跟踪/水平集方法，以确保充分耦合的表面诱导的Marangoni应力，界面扩散和惯性。我们的研究结果与（牛顿）动力学的液体片边缘，发现表面活性剂的浓度可以延迟，或有效地防止，打破的边缘。我们的模拟使用增长最快的瑞利-高原不稳定性驱动液滴脱离流体片（边缘）。这项工作的结果解开了重要的作用，马兰戈尼应力在回缩片动力学在大弹性数。我们研究了动力学对弹性数和界面刚性的敏感性。
Abstract In this work, we study the effect of insoluble surfactants on the three-dimensional rim-driven retraction dynamics of thin water sheets in air. We employ an interface-tracking/level-set method to ensure the full coupling between the surfactant-induced Marangoni stresses, interfacial diffusion and inertia. Our findings are contrasted with the (Newtonian) dynamics of a liquid sheet edge, finding that the surfactant concentration can delay, or effectively prevent, the breakup of the rim. Our simulations use the fastest growing Rayleigh–Plateau instability to drive droplet detachment from the fluid sheet (rim). The results of this work unravel the significant role of Marangoni stresses in the retracting sheet dynamics at large elasticity numbers. We study the sensitivity of the dynamics to the elasticity number and the rigidification of the interface.