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Linking particle properties to dense suspension extrusion flow characteristics using discrete element simulations
Authors
Andreotti
Aydin
+90 more
Bagnold
Ball
Benbow
Benbow
Bertrand
Besseling
Bossis
Bossis
Boyer
Brady
Brady
Brady
Brown
Brown
Cates
Cates
Chialvo
Chow
Coussot
Cundall
Da Cruz
Deboeuf
Draper
Elhweg
Engmann
Estrada
Estrada
Fernandez
Forterre
Gallier
Goyon
Gu
Gu
Guy
Herrmann
Hinch
Holst
Hong
Hongjun
Horrobin
Horrobin
Ikeda
Isa
Jamali
Jop
Kamrin
Kamrin
Khelifi
Kim
Kumar
Lapasin
Lemaitre
Lin
Liu
Louge
Luding
Majmudar
Mari
Martin
Mascia
Ness
Ness
Ness
Nott
Patel
Patil
Peck
Peters
Pham
Plimpton
Rabideau
Rough
Rough
Roussel
Seth
Seto
Singh
Sollich
Sun
Suzuki
Trulsson
Wagner
Wang
Wildman
Wilson
Yu
Yunker
Zhang
Zheng
Zhou
Publication date
5 May 2017
Publisher
AICHE Journal
Doi
Cite
Abstract
Extrusion is a widely used process for forming suspensions and pastes into designed shapes, and is central to the manufacture of many products. In this article, the extrusion through a square-entry die of non-Brownian spheres suspended in Newtonian fluid is investigated using discrete element simulations, capturing individual particle-particle contacts and hydrodynamic interactions. The simulations reveal inhomogeneous velocity and stress distributions, originating in the inherent microstructure formed by the constituent particles. Such features are shown to be relevant to generic paste extrusion behavior, such as extrudate swell. The pressure drop across the extruder is correlated with the extrudate flow rate, with the empirical fitting parameters being linked directly to particle properties such as surface friction, and processing conditions such as extruder wall roughness. Our model and results bring recent advances in suspension rheology into an industrial setting, laying foundations for future model development, predictive paste formulation and extrusion design. © 2016 American Institute of Chemical Engineers AIChE J, 63: 3069–3082, 201
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info:doi/10.1002%2Faic.15768
Last time updated on 03/01/2020
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oai:www.repository.cam.ac.uk:1...
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Last time updated on 21/11/2017