STOKESIAN DYNAMICS
STOKESIAN DYNAMICS
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DOI：
10.1146/annurev.fluid.20.1.111
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
J. Brady;G. Bossis
中科院分区：
文献类型：
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作者：
J. Brady;G. Bossis
悬浮或分散在流体介质中的颗粒发生在各种各样的天然和人造的设置，例如泥浆，复合材料，陶瓷，胶体，聚合物，蛋白质等的中心理论和实际问题是理解和预测的宏观平衡和传输性能的这些多相材料从他们的微观结构力学。宏观性质可以是颗粒悬浮液的沉降或聚集速率、自扩散系数、热导率或流变学。微观结构力学涉及作用在颗粒上的布朗力、颗粒间力、外力和流体动力，以及它们的空间和时间分布，这通常被称为微观结构。如果已知粒子的分布，以及任何边界的位置和运动，以及粒子和悬浮流体的物理性质，那么人们只需要解决（原则上，不一定在实践中）一个适定的边界值问题来确定材料的行为。在大体积上或在许多不同的配置上平均该溶液，可以确定宏观或平均性质。在这种方法中的两个关键步骤，多体问题的解决方案和微观结构的确定，是艰巨的，但了解悬浮行为的基本任务。本文讨论了一种新的，类似分子动力学的方法，
Particles suspended or dispersed in a fluid medium occur in a wide variety of natural and man-made s ttings, e.g. slurries, composite materials, ceramics, colloids, polymers, proteins, etc. The central theoretical and practical problem is to understand and predict the macroscopic equilibrium and transport properties of these multiphase materials from their microstructural mechanics. The macroscopic properties might be the sedimentation or aggregation rate, self-diffusion coefficient, thermal conductivity, or rheology of a suspension of particles. The microstructural mechanics entails the Brownian, interparticle, external, and hydrodynamic forces acting on the particles, as well as their spatial and temporal distribution, which is commonly referred to as the microstructure. If the distribution of particles were given, as well as the location and motion of any boundaries and the physical properties of the particles and suspending fluid, one would simply have to solve (in principle, not necessarily in practice) a well-posed boundary-value problem to determine the behavior of the material. Averaging this solution over a large volume or over many different configurations, the macroscopic or averaged properties could be determined. The two key steps in this approach, the solution of the manybody problem and the determination of the microstructure, are formidable but essential tasks for understanding suspension behavior. This article discusses a new, molecular-dynamics-like approach, which