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A novel method to investigate detachment of particulate structures from an elastic single fiber at low gas flow velocities

Poggemann, Lukas; Meyer, Jörg; Dittler, Achim

Abstract:
The detachment of particle structures from a stiff single fiber exposed to an airflow has been investigated by (Jankowska et al., 2000; Larsen, 1958; Löffler, 1972; Przekop et al., 2004; Qian et al., 1997; Zoller et al., 2020). In order to detach particle piles from a stiff single fiber, airflow velocities above 1.2 m/s are required. While these values are well above typical operational parameter for depth filters, a shift toward lower velocities for detachment would offer both up-and downside for filter operation. One possible application for controlled structure detachment from a filter fiber at lower velocities would be a shift of separated particulate structures from the upper layers of depth filter into lower regions. The result would be additional void space from particle deposition. Currently there is no knowledge available, if fiber stretching could enable such detachment of particle structure fragments at an operation airflow velocity below 1 m/s. It is assumed that fiber stretching might introduce shear and tensile stress to the particulate structures. That may lead to first cracks and promote final detachment. This study examines the behavior of particle structure fragments on an elastic single fiber for the first time. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000131730
Veröffentlicht am 22.04.2021
Originalveröffentlichung
DOI: 10.1016/j.jaerosci.2021.105785
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mechanische Verfahrenstechnik und Mechanik (MVM)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 08.2021
Sprache Englisch
Identifikator ISSN: 0021-8502
KITopen-ID: 1000131730
Erschienen in Journal of aerosol science
Verlag Elsevier
Band 156
Seiten Art.-Nr. 105785
Vorab online veröffentlicht am 15.04.2021
Schlagwörter Elastic, Fiber, Fiber-mounting device, Detachment
Nachgewiesen in Scopus
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