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Development of a New Solver to Model the Fish-Hook Effect in a Centrifugal Classifier

Betz, Michael 1; Nirschl, Hermann 1; Gleiss, Marco 1
1 Institut für Mechanische Verfahrenstechnik und Mechanik (MVM), Karlsruher Institut für Technologie (KIT)


entrifugal air classifiers are often used for classification of particle gas flows in the mineral industry and various other sectors. In this paper, a new solver based on the multiphase particle-in-cell (MP-PIC) method, which takes into account an interaction between particles, is presented. This makes it possible to investigate the flow process in the classifier in more detail, especially the influence of solid load on the flow profile and the fish-hook effect that sometimes occurs. Depending on the operating conditions, the fish-hook sometimes occurs in such apparatus and lead to a reduction in classification efficiency. Therefore, a better understanding and a representation of the fish-hook in numerical simulations is of great interest. The results of the simulation method are compared with results of previous simulation method, where particle–particle interactions are neglected. Moreover, a validation of the numerical simulations is carried out by comparing experimental data from a laboratory plant based on characteristic values such as pressure loss and classification efficiency. The comparison with experimental data shows that both methods provide similar good values for the classification efficiency d$_{50}$; however, the fish-hook effect is only reproduced when particle-particle interaction is taken into account. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000134341
Veröffentlicht am 23.06.2021
DOI: 10.3390/min11070663
Zitationen: 4
Zitationen: 4
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mechanische Verfahrenstechnik und Mechanik (MVM)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 22.06.2021
Sprache Englisch
Identifikator ISSN: 2075-163X
KITopen-ID: 1000134341
Erschienen in Minerals
Verlag MDPI
Band 11
Heft 7
Seiten Art.-Nr.: 663
Bemerkung zur Veröffentlichung This article belongs to the Section Mineral Processing and Extractive Metallurgy
Gefördert durch den KIT-Publikationsfonds
Schlagwörter centrifugal air classifier; particle classification; MPPIC; CFD; fish-hook
Nachgewiesen in Scopus
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