Transport Phenomena and Structuring in Shear Flow of Suspensions near Solid Walls

TL;DR

This study uses lattice-Boltzmann simulations to explore how particles in suspensions organize and transport near solid walls under shear, revealing wall-induced layering and particle-free zones.

Contribution

The paper extends lattice-Boltzmann methods to analyze suspension structuring and transport phenomena near walls under shear flow.

Findings

Particle free regions form near walls with width depending on shear rate and concentration

Parallel particle layers develop at low concentrations near walls

Number of particles per layer decreases with distance from the wall

Abstract

In this paper we apply the lattice-Boltzmann method and an extension to particle suspensions as introduced by Ladd et al. to study transport phenomena and structuring effects of particles suspended in a fluid near sheared solid walls. We find that a particle free region arises near walls, which has a width depending on the shear rate and the particle concentration. The wall causes the formation of parallel particle layers at low concentrations, where the number of particles per layer decreases with increasing distance to the wall.