Theoretical description of the dynamics of colloidal particles in flowing solvents near liquid-solid interfaces

液固界面附近流动溶剂中胶体颗粒动力学的理论描述

• 批准号: 23815893
• 负责人: Dr. Markus Rauscher
• 金额: --
• 依托单位: Max-Planck-Institut für Intelligente Systeme
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/23815893?language=en
• 关键词: Theoretical; description; dynamics; colloidal; particles

We study the dynamics of complex fluids in confined geometries (i.e., near walls or between two larger particles) in the framework of the dynamic density functional theory (DDFT). This non-equilibrium extension of the equilibrium density functional theory (DFT) allows to describe the collective dynamics of interacting Brownian particles at the microscopic level in terms of an evolution equation for the particle density. We will address issues related to the application of tracer particle based fluid velocimetry methods in the vicinity of walls, to boundary conditions for hydrodynamic equations describing the flow of suspensions in small channels, and to fluid structure mediated interactions among particles as well as between particles and walls (so-called depletion interactions). To this end, we extend the dynamic density functional theory to include the effect of solvent flow and hydrodynamic interactions between particles and walls.

我们研究受限几何中复杂流体的动力学（即，在动态密度泛函理论（DDFT）的框架中，在壁附近或在两个较大的颗粒之间）。平衡密度泛函理论（DFT）的这种非平衡扩展允许在微观水平上描述相互作用的布朗粒子的集体动力学的粒子密度的演化方程。我们将解决相关问题的示踪粒子为基础的流体测速方法在附近的墙壁，流体动力学方程描述悬浮液在小通道中的流动的边界条件，以及流体结构介导的颗粒之间的相互作用，以及颗粒和墙壁（所谓的耗尽相互作用）的应用。为此，我们扩展了动态密度泛函理论，包括溶剂流动和颗粒和壁之间的流体动力学相互作用的影响。