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Lift-off of multiple particles in a narrow channel

Journal Article (2020)
Author(s)

R. V. Maitri (Eindhoven University of Technology)

J. T. Padding (TU Delft - Complex Fluid Processing)

J. A.M. Kuipers (Eindhoven University of Technology)

E. A.J.F. Peters (Eindhoven University of Technology)

Research Group
Complex Fluid Processing
DOI related publication
https://doi.org/10.1016/j.cesx.2020.100086 Final published version
More Info
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Publication Year
2020
Language
English
Research Group
Complex Fluid Processing
Volume number
8
Article number
100086
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255
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Institutional Repository
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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.