Rupture process of liquid bridges: The effects of thermal fluctuations
Rupture process of liquid bridges: The effects of thermal fluctuations
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液桥的破裂过程：热波动的影响
DOI：
10.1103/physreve.102.023116
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发表时间：
2020
影响因子：
2.4
通讯作者：
Yuxiang Wang
中科院分区：
文献类型：
--
作者：
Jiayi Zhao;Nan Zhou;Kaixuan Zhang;Shuo Chen;Yang Liu;Yuxiang Wang
液桥断裂是一个复杂的动力学过程，近几十年来引起了人们的广泛关注。采用多体耗散粒子动力学方法，数值研究了热涨落对液桥破裂过程的影响。在提供了与经典线性稳定性理论的增长率的比较后，捕获了减薄液桥的完整过程。不同液体性质的惯性区（I），粘性区（V）和粘性惯性区（VI）之间的过渡被发现与以前的工作。在本研究中，提出了一个详细的描述的热涨落制度（TF）和另一个制度，命名为破碎制度。稀化液桥的完整运动轨迹分别概括为低OH液体的破碎和高OH液体的中间破碎。此外，还研究了热涨落对卫星液滴形成的影响。轴向速度峰值之间的距离被认为在形成卫星滴中起重要作用。强烈的热波动使轴向速度分布变得平滑，使低OH液体的液桥形状变为双锥状，而不会产生卫星液滴;而高OH液体的液桥长度延长，两端液丝断裂后形成较大的卫星液滴，这可能是由于强烈的热波动造成的。这一工作为进一步研究液桥断裂机理提供了理论依据，也为超细纳米压印的设计提供了理论依据。
Rupture of a liquid bridge is a complex dynamic process, which has attracted much attention over several decades. We numerically investigated the effects of the thermal fluctuations on the rupture process of liquid bridges by using a particle-based method know as many-body dissipative particle dynamics. After providing a comparison of growth rate with the classical linear stability theory, the complete process of thinning liquid bridges is captured. The transitions among the inertial regime (I), the viscous regime (V), and the viscous-inertial regime (VI) with different liquid properties are found in agreement with previous work. A detailed description of the thermal fluctuation regime (TF) and another regime, named the breakup regime, are proposed in the present study. The full trajectories of thinning liquid bridges are summarized asbreakup for low-Oh liquids andIntermediatebreakup for high-Oh liquids, respectively. Moreover, the effects of the thermal fluctuations on the formation of satellite drops are also investigated. The distance between the peaks of axial velocity is believed to play an important role in forming satellite drops. The strong thermal fluctuations smooth the distribution of axial velocity and change the liquid bridge shape into a double cone without generating satellite drops for low-Oh liquids, while for high-Oh liquids, this distance is extended and a large satellite drop is formed after the breakup of the liquid filament occurs on both ends, which might be due to strong thermal fluctuations. This work can provide insights on the rupture mechanism of liquid bridges and be helpful for designing superfine nanoprinting.