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 for this work

Complex Fluid Processing

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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 (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 - 2020

Keywords

Lift-off
Particle bed
Particle-resolved CFD
Sedimentation

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10.1016/j.cesx.2020.100086

1-s2.0-S2590140020300320-mainFinal published version, 2.8 MBLicence: CC BY

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title = "Lift-off of multiple particles in a narrow channel",

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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T1 - Lift-off of multiple particles in a narrow channel

AU - Maitri, R. V.

AU - Padding, J. T.

AU - Kuipers, J. A.M.

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

PY - 2020

Y1 - 2020

N2 - 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.

AB - 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.

KW - Lift-off

KW - Particle bed

KW - Particle-resolved CFD

KW - Sedimentation

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VL - 8

JO - Chemical Engineering Science: X

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Lift-off of multiple particles in a narrow channel

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