Lift-off of multiple particles in a narrow channel

R.V. Maitri; J.T. Padding; J.A.M. Kuipers; E.A.J.F. Peters

doi:10.1016/j.cesx.2020.100086

Lift-off of multiple particles in a narrow channel

R.V. Maitri, J.T. Padding, J.A.M. Kuipers, E.A.J.F. Peters (Corresponding author)

Multi-scale Modelling of Multi-phase Flows

Research output: Contribution to journal › Article › Academic › peer-review

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 (Re_s) 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.

Original language	English
Article number	100086
Number of pages	10
Journal	Chemical Engineering Science: X
Volume	8
DOIs	https://doi.org/10.1016/j.cesx.2020.100086
Publication status	Published - 1 Nov 2020

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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.",

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AU - Padding, J.T.

AU - Kuipers, J.A.M.

AU - Peters, E.A.J.F.

PY - 2020/11/1

Y1 - 2020/11/1

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