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CFD-DEM investigation of viscous solid–liquid mixing: Impact of particle properties and mixer characteristics

Bruno Blais, François Bertrand

Article (2017)

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Abstract

In chemical engineering, numerous processes require the suspension of particles in a laminar or transitional regime. For such operations, predicting the fraction of suspended particles as well as their distribution and homogeneity is a major concern. In this work, the unresolved CFD-DEM model introduced by our group for solid–liquid mixing is used to investigate the mixing dynamics of viscous suspensions. The techniques chosen to characterize the degree of suspension, the homogeneity and the distribution of the particles are presented. They are used to assess the efficiency of a pitched blade turbine with a clearance of C = T/4. The impact of solid properties on mixing dynamics is investigated by varying the Young's modulus, the coefficient of restitution and the sliding friction coefficient in the DEM model. Lastly, five alternative configurations of the mixing rig are investigated by varying the clearance of the impeller and introducing baffles.

Uncontrolled Keywords

Multiphase flows; Solid–liquid mixing; Computational fluid dynamics; Discrete element method; CFD-DEM

Subjects: 1800 Chemical engineering > 1800 Chemical engineering
Department: Department of Chemical Engineering
Research Center: URPEI - Research Center in Industrial Flow Processes
Funders: CRSNG/NSERC, CRSNG/NSERC - Vanier Scholarship, Canada Foundation for Innovation (CFI), Ministère de l’Économie, de l’Innovation et des Exportations du Québec (MEIE), RMGA, Fonds de recherche du Québec – Nature et technologies (FRQ-NT)
PolyPublie URL: https://publications.polymtl.ca/9066/
Journal Title: Chemical Engineering Research and Design (vol. 118)
Publisher: Elsevier
DOI: 10.1016/j.cherd.2016.12.018
Official URL: https://doi.org/10.1016/j.cherd.2016.12.018
Date Deposited: 12 Aug 2021 14:03
Last Modified: 21 Nov 2022 21:35
Cite in APA 7: Blais, B., & Bertrand, F. (2017). CFD-DEM investigation of viscous solid–liquid mixing: Impact of particle properties and mixer characteristics. Chemical Engineering Research and Design, 118, 270-285. https://doi.org/10.1016/j.cherd.2016.12.018

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