Surface Fluctuating Hydrodynamics Methods for the Drift-Diffusion Dynamics of Particles and Microstructures within Curved Fluid Interfaces
Surface Fluctuating Hydrodynamics Methods for the Drift-Diffusion Dynamics of Particles and Microstructures within Curved Fluid Interfaces
复制标题
弯曲流体界面内颗粒和微结构的漂移扩散动力学的表面脉动流体动力学方法
DOI：
10.1016/j.jcp.2022.110994
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
P. Atzberger
中科院分区：
文献类型：
--
作者：
David A. Rower;Misha Padidar;P. Atzberger
我们在表面上引入波动流体力学方法来捕捉浸没在球形弯曲流体界面中的粒子和微结构的漂移-扩散动力学。我们考虑了界面流体动力耦合、与周围散装流体的牵引耦合以及热波动。对于流固耦合，我们介绍了浸入边界法（IBM）和相关的曲面随机欧拉-拉格朗日方法（SELM）。我们使用这些方法来研究表面波动流体力学和微观结构的统计。对于速度自相关，我们发现特征幂律标度τ−1，τ−2和平台可以出现。这取决于与几何形状、表面粘度和体积粘度相关的物理状态。这不同于体积三维流体的特征τ−3/2标度。我们发展理论来解释这些观测到的与时间尺度有关的幂律，用于流体界面内的耗散和与周围流体的耦合。然后，我们使用我们介绍的方法研究了几个例子系统以及流体动力耦合和热波动的作用，包括弯曲流体界面中被动颗粒和主动微游泳者的动力学。
We introduce fluctuating hydrodynamics approaches on surfaces for capturing the drift-diffusion dynamics of particles and microstructures immersed within curved fluid interfaces of spherical shape. We take into account the interfacial hydrodynamic coupling, traction coupling with the surrounding bulk fluid, and thermal fluctuations. For fluid-structure interactions, we introduce Immersed Boundary Methods (IBM) and related Stochastic Eulerian-Lagrangian Methods (SELM) for curved surfaces. We use these approaches to investigate the statistics of surface fluctuating hydrodynamics and microstructures. For velocity autocorrelations, we find characteristic power-law scalings τ− 1, τ− 2, and plateaus can emerge. This depends on the physical regime associated with the geometry, surface viscosity, and bulk viscosity. This differs from the characteristic τ− 3/2 scaling for bulk three dimensional fluids. We develop theory explaining these observed power-laws associated with time-scales for dissipation within the fluid interface and coupling to the surrounding fluid. We then use our introduced methods to investigate a few example systems and roles of hydrodynamic coupling and thermal fluctuations including for the kinetics of passive particles and active microswimmers in curved fluid interfaces.
影响因子：
44.1
作者：
Marchetti, M. C.;Joanny, J. F.;Simha, R. Aditi
通讯作者：
Simha, R. Aditi
弯曲脂质膜的不可逆热力学。
DOI：
10.1103/physreve.96.042409
发表时间：
2017
期刊：
Physical review. E
影响因子：
--
作者：
Sahu,Amaresh;Sauer,RogerA;Mandadapu,KranthiK
通讯作者：
Mandadapu,KranthiK