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A two-way coupled model of particle-laden turbulence

Citation

Skjaeraasen, O and Skartlien, R and Zarruk, GA, A two-way coupled model of particle-laden turbulence, Journal of Dispersion Science and Technology, 36, (10) pp. 1493-1512. ISSN 0193-2691 (2015) [Refereed Article]

Copyright Statement

Copyright 2015 Taylor & Francis Group, LLC

DOI: doi:10.1080/01932691.2014.1003069

Abstract

A model for turbulent suspensions involving two-way coupling between a liquid carrier phase and a solid dispersed phase is presented. Closure relations are obtained from particle kinetic theory, with both drag and virtual mass effects taken into account. It is shown that the feedback on the flow due to the particles mainly depends on the particle concentration, the characteristic Stokes numbers, and the density ratio between the particle and liquid phases. Over a broad parameter range, we find that drag coupling gives turbulence damping and an increased streaming velocity. Added mass coupling has the opposite effect. Some of the model predictions are compared with data given in the literature, and with PIV experimental data. It is found that the model is generally consistent with experiments; in particular, when it comes to the observed turbulence damping and drag reduction effects. The model can be used as a stand-alone tool to calculate turbulent stresses, mean velocities and concentration profiles of both phases. Alternatively, it can serve as basis for a reduced parametric model of particle feedback effects on; for example, the eddy viscosity, and thus the pressure drop and superficial speed.

Item Details

Item Type:Refereed Article
Keywords:drag reduction, liquid-particle interactions, particle transport, particle-laden flow, suspensions, turbulence, turbulent boundary layer
Research Division:Engineering
Research Group:Interdisciplinary Engineering
Research Field:Fluidisation and Fluid Mechanics
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in Engineering
Author:Zarruk, GA (Dr Gustavo Zarruk Serrano)
ID Code:106762
Year Published:2015
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2016-02-19
Last Modified:2016-09-20
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