SPH simulations of binary droplet deformation considering the Fowkes theory
SPH simulations of binary droplet deformation considering the Fowkes theory
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DOI：
10.1016/j.ces.2020.116035
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发表时间：
2021-01
影响因子：
4.7
通讯作者：
S. Natsui;Kazui Tonya;H. Nogami;T. Kikuchi;R. Suzuki
中科院分区：
文献类型：
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作者：
S. Natsui;Kazui Tonya;H. Nogami;T. Kikuchi;R. Suzuki
为了分析包含两个不互溶相的复杂液滴瞬态变形，在SPH框架下引入了一个实用的多界面张力模型。使用Fowkes理论模型将作用在不同相之间的界面上的吸引力明确定义为伦敦分散力，并且可以使用与周围颗粒相对应的吸引力大小的总和来计算界面张力。解析解与模拟结果吻合较好，对应于宏观多接触角和相间界面力的性质。这个简单的模型是广泛适用于毛细管力的动态分析，涉及两种或两种以上的液体，我们证明了它的应用程序的模拟的变形行为的二元液滴接触固体。固-液-液接触角不足以预测平衡形态，应考虑两种液体之间的动量交换。
To analyze the complex droplet transient deformation involving two immiscible phases, a practical multi-interfacial tension model has been introduced in the SPH framework. The attraction, which operates on the interface between the different phases is explicitly defined as London dispersion force using the Fowkes theoretical model, and the interfacial tension can be calculated using the sum of the attraction magnitudes corresponding to the surrounding particles. The analytical solution demonstrated good agreement with the simulated results corresponding to the macroscopic multicontact angles and nature of interphase interfacial forces. This simple model is widely applicable to the dynamic analysis of capillary forces involving two or more liquids, and we demonstrated its application to the simulation of the deformation behavior of a binary droplet that contacts a solid. The solid-liquid-liquid contact angle is not sufficient to predict the equilibrium morphology, and the momentum exchange between the two liquids should be considered.