论文标题
表面活性剂诱导的Marangoni应力在缩回液体板上的作用
Role of surfactant-induced Marangoni stresses in retracting liquid sheets
论文作者
论文摘要
在这项工作中，我们研究了不溶性表面活性剂对空气中薄水片的三维逆转缩回动力学的影响。我们采用界面跟踪/级别测量方法来确保表面活性剂诱导的Marangoni压力，界面扩散和惯性之间的完整耦合。我们的发现与液体板边缘的（牛顿）动力学形成鲜明对比，表面活性剂浓度可以预防或延迟边缘的破裂。我们的模拟使用生长最快的雷利 - 帕拉托不稳定性从流体板（RIM）驱动液滴脱离。这项工作的结果揭示了Marangoni应力在大弹性数字上的缩回板动力学中的重要作用。我们研究动力学对弹性数和界面刚化的敏感性。
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 prevent, or delay, 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.
