Lift-off of multiple particles in a narrow channel

Journal article (2020)

Authors

R.V. Maitri Eindhoven University of Technology
J.T. Padding Complex Fluid Processing - Mechanical, Maritime and Materials Engineering
J. A.M. Kuipers Eindhoven University of Technology
E.A.J.F. Peters Eindhoven University of Technology
Research Group
Complex Fluid Processing (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2020 R. V. Maitri, J.T. Padding, J. A.M. Kuipers, E. A.J.F. Peters
DOI: https://doi.org/10.1016/j.cesx.2020.100086
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Published Date

2020

Language

English

Faculty

Mechanical, Maritime and Materials Engineering

Department

Process and Energy

Research Group

Complex Fluid Processing

Abstract

In this work, we perform simulations of particle laden flow in a wide and long narrow channel in a Newtonian fluid. Simulations are performed for mono-sized and equal density spheres with varying Archimedes and Reynolds number. In the simulations, different phases of particle transport - rolling, saltation and suspension are observed. During simulations the average bed height is monitored and its steady state value is used for proposing a correlation between solids volume fraction (ϕ), shear Reynolds number (Res) and Archimedes number (Ar). This correlation is used to predict the critical shear Reynolds number for particle lift-off and a condition at which particles would occupy the whole channel at a given Archimedes number. The value of this critical Reynolds number is compared with the critical Reynolds number for single particle lift-off.