Silva Danilo P F, Coelho Rodrigo C V, Pagonabarraga Ignacio, Succi Sauro, Telo da Gama Margarida M, Araújo Nuno A M
Centro de Física Teórica e Computacional, Faculdade de Ciências, Universidade de Lisboa, P-1749-016 Lisboa, Portugal.
Departamento de Física, Faculdade de Ciências, Universidade de Lisboa, P-1749-016 Lisboa, Portugal.
Soft Matter. 2024 Mar 13;20(11):2419-2441. doi: 10.1039/d3sm01648j.
With the rapid development of studies involving droplet microfluidics, drug delivery, cell detection, and microparticle synthesis, among others, many scientists have invested significant efforts to model the flow of these fluid-filled bodies. Motivated by the intricate coupling between hydrodynamics and the interactions of fluid-filled bodies, several methods have been developed. The objective of this review is to present a compact foundation of the methods used in the literature in the context of lattice Boltzmann methods. For hydrodynamics, we focus on the lattice Boltzmann method due to its specific ability to treat time- and spatial-dependent boundary conditions and to incorporate new physical models in a computationally efficient way. We split the existing methods into two groups with regard to the interfacial boundary: fluid-structure and fluid-fluid methods. The fluid-structure methods are characterised by the coupling between fluid dynamics and mechanics of the flowing body, often used in applications involving membranes and similar flexible solid boundaries. We further divide fluid-structure-based methods into two subcategories, those which treat the fluid-structure boundary as a continuum medium and those that treat it as a discrete collection of individual springs and particles. Next, we discuss the fluid-fluid methods, particularly useful for the simulations of fluid-fluid interfaces. We focus on models for immiscible droplets and their interaction in a suspending fluid and describe benchmark tests to validate the models for fluid-filled bodies.
随着涉及微滴微流控、药物递送、细胞检测和微粒合成等研究的迅速发展，许多科学家投入了大量精力来模拟这些充满流体的物体的流动。受流体动力学与充满流体的物体之间复杂耦合的推动，已开发出多种方法。本综述的目的是在格子玻尔兹曼方法的背景下，为文献中使用的方法提供一个简明的基础。对于流体动力学，我们专注于格子玻尔兹曼方法，因为它具有处理与时间和空间相关的边界条件以及以计算高效的方式纳入新物理模型的特殊能力。我们根据界面边界将现有方法分为两组：流固耦合方法和流-流方法。流固耦合方法的特点是流体动力学与流动物体的力学之间的耦合，常用于涉及膜和类似柔性固体边界的应用中。我们进一步将基于流固耦合的方法分为两个子类别，一类将流固边界视为连续介质，另一类将其视为单个弹簧和粒子的离散集合。接下来，我们讨论流-流方法，其对模拟流体-流体界面特别有用。我们专注于不混溶微滴及其在悬浮流体中的相互作用的模型，并描述用于验证充满流体物体模型的基准测试。
