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dc.contributor.authorWilson, DI
dc.contributor.authorPatel, MJ
dc.contributor.authorBlackburn, S
dc.date.accessioned2017-07-04T10:16:15Z
dc.date.available2017-07-04T10:16:15Z
dc.date.issued2017-11-23
dc.identifier.issn0009-2509
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/265142
dc.description.abstractExtrusion of solid-liquid particulate pastes is a well-established process in industry for continuously forming products of defined cross-sectional shape. At low extrusion velocities, the solids and liquid phases can separate due to drainage of liquid through the interparticle pores, termed liquid phase migration (LPM). The effect of wall friction, die shape and extrusion speed on LPM in a cylindrically axisymmetric ram extruder is investigated using a two-dimensional finite element model of paste extrusion based on soil mechanics principles (modified Cam-Clay). This extends the smooth walled model reported by Patel et al. (2007) to incorporate a simplified Tresca wall friction condition. Three die entry angles (90°, 60° and 45°) and two extrusion speeds are considered. The extrusion pressure is predicted to increase with the Tresca friction factor and the extent of LPM is predicted to increase with decreasing ram speed (both as expected). The effects of wall friction on LPM are shown to be dictated by the die shape and ram displacement: there are few general rules relating extruder design and operating conditions to extent of LPM, so that finite element-based simulation is likely to be needed to predict the onset of LPM accurately.
dc.description.sponsorshipPowdermatriX Faraday Programme under EPSRC project GR/S/70340
dc.language.isoen
dc.publisherElsevier
dc.rightsAttribution 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.titleModelling of paste ram extrusion subject to liquid phase migration and wall friction
dc.typeArticle
prism.endingPage502
prism.publicationDate2017
prism.publicationNameChemical Engineering Science
prism.startingPage487
prism.volume172
dc.identifier.doi10.17863/CAM.11156
dcterms.dateAccepted2017-07-01
rioxxterms.versionofrecord10.1016/j.ces.2017.07.001
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://creativecommons.org/licenses/by/4.0/
rioxxterms.licenseref.startdate2017-11-23
dc.contributor.orcidWilson, Ian [0000-0003-3950-9165]
dc.identifier.eissn1873-4405
dc.publisher.urlhttps://www.sciencedirect.com/science/article/pii/S0009250917304414?via%3Dihub
rioxxterms.typeJournal Article/Review
pubs.funder-project-idEPSRC (218)
cam.issuedOnline2017-07-03
dc.identifier.urlhttps://www.sciencedirect.com/science/article/pii/S0009250917304414?via%3Dihub
datacite.issupplementedby.urlhttps://doi.org/10.17863/CAM.11828
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Attribution 4.0 International
Except where otherwise noted, this item's licence is described as Attribution 4.0 International