Motion of a swimming droplet under external perturbations: A model-based approach
Motion of a swimming droplet under external perturbations: A model-based approach
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外部扰动下游动液滴的运动：基于模型的方法
DOI：
10.1103/physreve.106.034610
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发表时间：
2022
影响因子：
2.4
通讯作者：
Masatoshi Ichikawa
中科院分区：
文献类型：
--
作者：
Saori Suda;Tomoharu Suda;Takuya Ohmura;Masatoshi Ichikawa
由马兰戈尼效应驱动的微滴尽管成分简单，但已知会持续游动数小时。随着佩克莱数的增加，这种游动的微滴的运动从直线变为曲线，再变为混沌。在这项研究中，我们研究了外部扰动对马兰戈尼效应驱动的液滴三维轴非对称模型的影响。这里的目的是阐明外部扰动的液滴的复杂运动的贡献，并根据液滴的大小在其效果的变化。在本文中，首先，我们提供了一个详细的解释，在我们以前的工作中，这是接下来用来描述的液滴的运动的角度响应随机扰动的数值研究的推导。对不同噪声条件下液滴运动的数值模拟表明，该模型并没有将液滴运动收敛到某一种运动形式，而是有助于反映外界扰动。结果表明，外部扰动的类型和性质对液滴的运动有相当大的影响。
Microdroplets driven by the Marangoni effect are known to continue to swim for hours despite their simple composition. This swimming microdroplet changes its motion from straight to curvilinear and further to chaotic as the Péclet number increases. In this study, we investigate the effect of external perturbations on the three-dimensional axis-asymmetric model of a droplet driven by the Marangoni effect. The aim here is to elucidate the contribution of external perturbation to the complex motion of the droplet and the change in its effect according to the droplet size. In this paper, first we provide a detailed explanation on the derivation of the model introduced in our previous work, which is next used to describe the motion of the droplet in the numerical study of the angular response to random perturbations. The numerical simulation of droplet motion with different types of noise indicates that the model does not converge them into a certain type of motion but rather helps to reflect the external perturbations. The obtained results suggest that the types and properties of external perturbation have a considerable effect on the droplet motion.