Four-way coupled simulations of small particles in turbulent channel flow: The effects of particle shape and Stokes number
| Autor: | William K. George, B. G. M. van Wachem, F. Zhao |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Fluid Flow and Transfer Processes
Physics Turbulence K-epsilon turbulence model Mechanical Engineering Computational Mechanics Particle-laden flows Reynolds number Mechanics Condensed Matter Physics Open-channel flow Physics::Fluid Dynamics symbols.namesake Mechanics of Materials Turbulence kinetic energy symbols Two-phase flow Stokes number |
| Zdroj: | Physics of Fluids. 27:083301 |
| ISSN: | 1089-7666 1070-6631 |
| DOI: | 10.1063/1.4927277 |
| Popis: | This paper investigates the effects of particle shape and Stokes number on the behaviour of non-spherical particles in turbulent channel flow. Although there are a number of studies concerning spherical particles in turbulent flows, most important applications occurring in process, energy, and pharmaceutical industries deal with non-spherical particles. The computation employs a unique and novel four-way coupling with the Lagrangian point-particle approach. The fluid phase at low Reynolds number (Reτ = 150) is modelled by direct numerical simulation, while particles are tracked individually. Inter-particle and particle-wall collisions are also taken into account. To explore the effects of particles on the flow turbulence, the statistics of the fluid flow such as the fluid velocity, the terms in the turbulence kinetic energy equation, the slip velocity between the two phases and velocity correlations are analysed considering ellipsoidal particles with different inertia and aspect ratio. The results of the ... |
| Databáze: | OpenAIRE |
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