Lagrangian particle tracking in mechanically agitated polydisperse suspensions: multi-component hydrodynamics and spatial distribution

Li Liu; Mostafa Barigou

doi:10.1016/j.ijmultiphaseflow.2015.03.008

Lagrangian particle tracking in mechanically agitated polydisperse suspensions: multi-component hydrodynamics and spatial distribution

Li Liu, Mostafa Barigou

Chemical Engineering

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Abstract

We investigated the local hydrodynamics and phase distribution of complex polydisperse suspensions ‘just-suspended’ by a down-pumping pitched blade impeller in a mechanically agitated vessel. The solid-liquid mixtures consisted of five size fractions of coarse glass particles in water, and the total concentration was varied within the range 2.423.6 vol% (540 wt%). The whole flow field and spatial distribution of the liquid phase and of each particle size fraction were resolved using the Lagrangian technique of positron emission particle tracking (PEPT). For the first time, it has been possible to conduct such a detailed ‘pointwise’ examination within an opaque polydisperse suspension of this type and complexity. For each component of the two-phase flow, results are presented in the form of maps of local velocity, solid concentration and time-averaged slip velocity, as well as plots of spatial suspension uniformity index. The accuracy of measurements is verified through six-component mass balance and mass continuity calculations.

Original language	English
Pages (from-to)	80–89
Number of pages	10
Journal	International Journal of Multiphase Flow
Volume	73
Early online date	16 Mar 2015
DOIs	https://doi.org/10.1016/j.ijmultiphaseflow.2015.03.008
Publication status	Published - Jul 2015

Keywords

Lagrangian tracking
Mixing
PEPT
Polydisperse suspension
Slip velocity
Suspension uniformity

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10.1016/j.ijmultiphaseflow.2015.03.008

Liu_Lagrangian_particle_traking_International_Journal_Multiphase_Flow_2015
NOTICE: this is the author’s version of a work that was accepted for publication. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published as Liu, L., Barigou, M., Lagrangian Particle Tracking in Mechanically Agitated Polydisperse Suspensions: Multi-Component Hydrodynamics and Spatial Distribu tion, International Journal of Multiphase Flow (2015), doi: http://dx.doi.org/10.1016/j.ijmultiphaseflow.2015.03.008
Accepted author manuscript, 2.12 MBLicence: Other (please specify with Rights Statement)

http://www.sciencedirect.com/science/article/pii/S0301932215000646

Cite this

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title = "Lagrangian particle tracking in mechanically agitated polydisperse suspensions: multi-component hydrodynamics and spatial distribution",

abstract = "We investigated the local hydrodynamics and phase distribution of complex polydisperse suspensions {\textquoteleft}just-suspended{\textquoteright} by a down-pumping pitched blade impeller in a mechanically agitated vessel. The solid-liquid mixtures consisted of five size fractions of coarse glass particles in water, and the total concentration was varied within the range 2.423.6 vol% (540 wt%). The whole flow field and spatial distribution of the liquid phase and of each particle size fraction were resolved using the Lagrangian technique of positron emission particle tracking (PEPT). For the first time, it has been possible to conduct such a detailed {\textquoteleft}pointwise{\textquoteright} examination within an opaque polydisperse suspension of this type and complexity. For each component of the two-phase flow, results are presented in the form of maps of local velocity, solid concentration and time-averaged slip velocity, as well as plots of spatial suspension uniformity index. The accuracy of measurements is verified through six-component mass balance and mass continuity calculations.",

keywords = "Lagrangian tracking, Mixing, PEPT, Polydisperse suspension, Slip velocity, Suspension uniformity",

author = "Li Liu and Mostafa Barigou",

year = "2015",

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doi = "10.1016/j.ijmultiphaseflow.2015.03.008",

language = "English",

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journal = "International Journal of Multiphase Flow",

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T1 - Lagrangian particle tracking in mechanically agitated polydisperse suspensions: multi-component hydrodynamics and spatial distribution

AU - Liu, Li

AU - Barigou, Mostafa

PY - 2015/7

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N2 - We investigated the local hydrodynamics and phase distribution of complex polydisperse suspensions ‘just-suspended’ by a down-pumping pitched blade impeller in a mechanically agitated vessel. The solid-liquid mixtures consisted of five size fractions of coarse glass particles in water, and the total concentration was varied within the range 2.423.6 vol% (540 wt%). The whole flow field and spatial distribution of the liquid phase and of each particle size fraction were resolved using the Lagrangian technique of positron emission particle tracking (PEPT). For the first time, it has been possible to conduct such a detailed ‘pointwise’ examination within an opaque polydisperse suspension of this type and complexity. For each component of the two-phase flow, results are presented in the form of maps of local velocity, solid concentration and time-averaged slip velocity, as well as plots of spatial suspension uniformity index. The accuracy of measurements is verified through six-component mass balance and mass continuity calculations.

AB - We investigated the local hydrodynamics and phase distribution of complex polydisperse suspensions ‘just-suspended’ by a down-pumping pitched blade impeller in a mechanically agitated vessel. The solid-liquid mixtures consisted of five size fractions of coarse glass particles in water, and the total concentration was varied within the range 2.423.6 vol% (540 wt%). The whole flow field and spatial distribution of the liquid phase and of each particle size fraction were resolved using the Lagrangian technique of positron emission particle tracking (PEPT). For the first time, it has been possible to conduct such a detailed ‘pointwise’ examination within an opaque polydisperse suspension of this type and complexity. For each component of the two-phase flow, results are presented in the form of maps of local velocity, solid concentration and time-averaged slip velocity, as well as plots of spatial suspension uniformity index. The accuracy of measurements is verified through six-component mass balance and mass continuity calculations.

KW - Lagrangian tracking

KW - Mixing

KW - PEPT

KW - Polydisperse suspension

KW - Slip velocity

KW - Suspension uniformity

U2 - 10.1016/j.ijmultiphaseflow.2015.03.008

DO - 10.1016/j.ijmultiphaseflow.2015.03.008

M3 - Article

SN - 0301-9322

VL - 73

SP - 80

EP - 89

JO - International Journal of Multiphase Flow

JF - International Journal of Multiphase Flow

ER -

Lagrangian particle tracking in mechanically agitated polydisperse suspensions: multi-component hydrodynamics and spatial distribution

Abstract

Keywords

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