Lifting off a solid sphere from a flat bottom by laminar fluid flow

Chao Wang; Hanbin Wang; Kun Zhang; Zhipeng Li; Zhengming Gao; Jos J. Derksen

doi:10.1002/aic.16886

Lifting off a solid sphere from a flat bottom by laminar fluid flow

Chao Wang, Hanbin Wang, Kun Zhang, Zhipeng Li^* (Corresponding Author), Zhengming Gao (Corresponding Author), Jos J. Derksen

^*Corresponding author for this work

Beijing University of Chemical Technology

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

3 Citations (Scopus)

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Abstract

We perform quantitative visualization experiments on the vertical (z-direction) motion of a spherical solid particle being lifted off a horizontal flat bottom due to laminar fluid flow generated by a revolving impeller. Describing the observed motion of the particle in terms of a constant vertical hydrodynamic force overcoming gravity and the lubrication force has limited success. For this reason we hypothesize that the hydrodynamic force on the particle quickly increases with its distance from the bottom. This hypothesis is supported by detailed numerical simulations of the flow around the particle. Integrating the equation of motion of the sphere with the vertical hydrodynamic force as a linear function of z derived from simulations provides an adequate description of the experimentally observed vertical motion of the particle.

Original language	English
Article number	e16886
Number of pages	13
Journal	AIChE Journal
Volume	66
Issue number	4
Early online date	29 Dec 2019
DOIs	https://doi.org/10.1002/aic.16886
Publication status	Published - 1 Apr 2020

Bibliographical note

The financial support from the National Key R&D Program of China (2016YFB0302801), National Natural Science Foundation of China (No. 21676007), and the Fundamental Research Funds for the Central Universities (XK1802-1) are gratefully acknowledged.

Keywords

solids suspension
quantitative visualization
lubrication force
particle-resolved simulation
agitated flow
PARTICLES
STIRRED-TANK
SLOW MOTION
SUSPENSION
BOLTZMANN
VELOCIMETRY EXPERIMENTS
BOUNDARY
NUMERICAL SIMULATIONS
EQUATION
VISCOUS FLUID

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Wang_et_al_AIChEJournal_LiftingOff_AAM
This is the peer reviewed version of the following article: Wang, C, Wang, H, Zhang, K, Li, Z, Gao, Z, Derksen, JJ. Lifting off a solid sphere from a flat bottom by laminar fluid flow. AIChE J. 2020; 66:e16886. , which has been published in final form at https://doi.org/10.1002/aic.16886. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Accepted author manuscript, 6.51 MBLicence: Unspecified

Cite this

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title = "Lifting off a solid sphere from a flat bottom by laminar fluid flow",

abstract = "We perform quantitative visualization experiments on the vertical (z-direction) motion of a spherical solid particle being lifted off a horizontal flat bottom due to laminar fluid flow generated by a revolving impeller. Describing the observed motion of the particle in terms of a constant vertical hydrodynamic force overcoming gravity and the lubrication force has limited success. For this reason we hypothesize that the hydrodynamic force on the particle quickly increases with its distance from the bottom. This hypothesis is supported by detailed numerical simulations of the flow around the particle. Integrating the equation of motion of the sphere with the vertical hydrodynamic force as a linear function of z derived from simulations provides an adequate description of the experimentally observed vertical motion of the particle. ",

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author = "Chao Wang and Hanbin Wang and Kun Zhang and Zhipeng Li and Zhengming Gao and Derksen, {Jos J.}",

note = "The financial support from the National Key R&D Program of China (2016YFB0302801), National Natural Science Foundation of China (No. 21676007), and the Fundamental Research Funds for the Central Universities (XK1802-1) are gratefully acknowledged. ",

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AU - Li, Zhipeng

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AU - Derksen, Jos J.

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Lifting off a solid sphere from a flat bottom by laminar fluid flow

Abstract

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