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)

EAISI High Tech Systems

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

Funding

This work is supported by the programme ‘Computational Sciences for Energy Research (CSER)’ of the Foundation for Fundamental Research on Matter (FOM) which is now part of the Netherlands Organisation for Scientific Research Institutes (NWO-I). This research is also co-financed by Shell Global Solutions International B.V. This work was carried out on the Dutch national e-infrastructure with the support of SURF Cooperative.

Funders
Nederlandse Organisatie voor Wetenschappelijk Onderzoek
SURF
Shell Global Solutions B.V.
Stichting voor Fundamenteel Onderzoek der Materie

Keywords

Lift-off
Particle bed
Particle-resolved CFD
Sedimentation

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10.1016/j.cesx.2020.100086Licence: CC BY

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AU - Padding, J.T.

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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.

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Lift-off of multiple particles in a narrow channel

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