Interaction of impinging marangoni fields
Interaction of impinging marangoni fields
复制标题
撞击马兰戈尼场的相互作用
DOI：
10.1016/j.jcis.2023.09.109
复制
发表时间：
2024
影响因子：
9.9
通讯作者：
Tilton, Robert D.
中科院分区：
文献类型：
--
作者：
Iasella, Steven;Sharma, Ramankur;Garoff, Stephen;Tilton, Robert D.
假设表面张力梯度驱动的Marangoni流起源于多个来源是重要的许多工业和医疗应用，但理论文献集中在单一的表面活性剂来源。了解两种分散的表面活性剂源如何相互作用，可以将单源实验的见解应用于多源应用。多源扩散的两个关键特征-源平移和源变形-可以通过两源系统的输运建模来解释。ModelingNumerical simulations的两个油酸磁盘放置在不同的初始分离距离上的甘油subphase进行了使用COMSOL Multiphysics和比较的扩展的一个单一的表面活性剂sources.FindingsInteraction的两个扩展源可以分为三个regimes：独立状态--每个源不受另一个源的影响;相互作用状态--第二个源的存在改变了传播动力学的一个或多个特征;准一个圆盘状态--两个源合并在一起。的源，表现为增加磁盘质量中心之间的分离距离的平移，是由亚相内的流场和由此产生的表面变形，而变形的源只发生在两个源的表面活性剂前满足。
HypothesisSurface tension gradient driven Marangoni flows originating from multiple sources are important to many industrial and medical applications, but the theoretical literature focuses on single surfactant sources. Understanding how two spreading surfactant sources interact allows insights from single source experiments to be applied to multi-source applications. Two key features of multi-source spreading – source translation and source deformation – can be explained by transport modeling of a two-source system.ModelingNumerical simulations of two oleic acid disks placed at varying initial separation distances on a glycerol subphase were performed using COMSOL Multiphysics and compared to spreading of a single surfactant source.FindingsInteraction of two spreading sources can be split into three regimes: the independent regime – where each source is unaffected by the other, the interaction regime – where the presence of a second source alters one or more features of the spreading dynamics, and the quasi-one disk regime – where the two sources merge together. The translation of the sources, manifested as increasing separation distance between disk centers of mass, is driven by the flow fields within the subphase and the resultant surface deformation, while deformation of the sources occurs only once the surfactant fronts of the two sources meet.