DEM simulations of screening processes under the influence of moisture

dc.contributor.authorElskamp, Frederik
dc.contributor.authorKruggel-Emden, Harald
dc.date.accessioned2019-03-21T13:52:29Z
dc.date.available2019-03-21T13:52:29Z
dc.date.issued2018
dc.description.abstractIn a wide field of applications, screening is required to separate bulk materials according to their particle sizes. Due to environmental, material or process related effects, particles frequently prevail in moist conditions, which is not preferred due to attractive forces altering the screening efficiency, but often not preventable. As for the design of dry screening processes detailed particle-based simulation approaches like the discrete element method (DEM) and phenomenological models are available, a step towards meeting the requirements for real particle systems under moist conditions is made. Therefore, batch screening under the influence of moisture is investigated experimentally and by using DEM simulations involving different sized polyoxymethylene and glass spheres. For this purpose, a DEM code is extended to calculate forces caused by liquid bridges, forming out between particles or walls close to each other under moist conditions. Thereby, the bridge formation and rupture and the liquid distribution are considered. First, the DEM framework is validated against experiments by monitoring the capillary and viscous force acting on two liquid bridge contact partners. Further extensive validations are performed by comparing the fraction retained over time and the final liquid distribution for discontinuous screening under the influence of various amounts of liquid for different mechanical agitations in experiments and simulations. Finally, the detailed liquid distribution over time in the DEM simulations is examined and general conclusions are drawn. The overall aim is to use the framework and the respective data, to extend phenomenological process models for screening under moist conditions in subsequent studies.en
dc.description.sponsorshipDFG, SPP 1679, Dynamische Simulation vernetzter Feststoffprozesseen
dc.identifier.eissn1744-3563
dc.identifier.issn0263-8762
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/9237
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-8317
dc.language.isoenen
dc.relation.ispartof10.14279/depositonce-7831
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.ddc620 Ingenieurwissenschaften und zugeordnete Tätigkeitende
dc.subject.otherdiscrete element methoden
dc.subject.otherDEMen
dc.subject.othercapillary and viscous forcesen
dc.subject.otherliquid bridgeen
dc.subject.otherscreeningen
dc.subject.othermoistureen
dc.titleDEM simulations of screening processes under the influence of moistureen
dc.typeArticleen
dc.type.versionacceptedVersionen
dcterms.bibliographicCitation.doi10.1016/j.cherd.2018.06.022en
dcterms.bibliographicCitation.journaltitleChemical engineering research and designen
dcterms.bibliographicCitation.originalpublishernameElsevieren
dcterms.bibliographicCitation.originalpublisherplaceAmsterdamen
dcterms.bibliographicCitation.pageend609en
dcterms.bibliographicCitation.pagestart593en
dcterms.bibliographicCitation.volume136en
tub.accessrights.dnbdomain*
tub.affiliationFak. 3 Prozesswissenschaften::Inst. Prozess- und Verfahrenstechnik::FG Mechanische Verfahrenstechnik und Aufbereitungde
tub.affiliation.facultyFak. 3 Prozesswissenschaftende
tub.affiliation.groupFG Mechanische Verfahrenstechnik und Aufbereitungde
tub.affiliation.instituteInst. Prozess- und Verfahrenstechnikde
tub.publisher.universityorinstitutionTechnische Universität Berlinen

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