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Spatial Distribution of Inertial Particles in Turbulent Taylor-Couette Flow by Jiang, Hao; Lu, Zhi-ming; Wang, Bo-fu; Meng, Xiao-hui; Shen, Jie; Chong, Kai Leong is a scholarly article available to read on EtoBox.

What is Spatial Distribution of Inertial Particles in Turbulent Taylor-Couette Flow about?

This study investigates the spatial distribution of inertial particles in turbulent Taylor-Couette flow. Direct numerical simulations are performed using a one-way coupled Eulerian-Lagrangian approach, with a fixed inner wall Reynolds number of 2500 for the carrier flow, while the particle Stokes number varies from 0.034 to 1 for the dispersed phase. We first examine the issue of preferential concentration of particles near the outer wall region. Employing two-dimensional (2D) Voronoi analysis, we observe a pronounced particle clustering with increasing $St$, particularly evident in regions of low fluid velocity. Additionally, we investigate the concentration balance equation, inspired by the work of johnson et al.(2020), to examine particle radial distribution. We discern the predominant sources of influence, namely biased sampling, turbophoresis, and centrifugal effects. Across all cases, centrifugal force emerges as the primary driver, causing particle migration towards the outer wall. Biased sampling predominantly affects smaller inertial particles, driving them towards the inner wall due to sampling within Taylor rolls with inward radial velocity. Conversely, turbophoresis pri

Author

Jiang, Hao; Lu, Zhi-ming; Wang, Bo-fu; Meng, Xiao-hui; Shen, Jie; Chong, Kai Leong

Published

2024

Language

EN