Cohesive powder flow: trends and challenges in characterisation and analysis

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dc.contributor.authorGhadiri, Mojtaba
dc.contributor.authorPasha, Mehrdad
dc.contributor.authorNan, Wenguang
dc.contributor.authorHare, Colin
dc.contributor.authorVivacqua, Vincenzino
dc.contributor.authorZafar, Umair
dc.contributor.authorNezamabadi, Saeid
dc.contributor.authorLópez García, Alejandro
dc.contributor.authorPasha, Massih
dc.contributor.authorNadimi, Sadegh
dc.date.accessioned2025-10-22T07:10:23Z
dc.date.available2025-10-22T07:10:23Z
dc.date.issued2020-01-10
dc.date.updated2025-10-22T07:10:23Z
dc.description.abstractPowder processing and manufacturing operations are rate processes for which the bottleneck is cohesive powder flow. Diversity of material properties, particulate form, and sensitivity to environmental conditions, such as humidity and tribo-electric charging, make its prediction very challenging. However, this is highly desirable particularly when addressing a powder material for which only a small quantity is available. Furthermore, in a number of applications powder flow testing at low stress levels is highly desirable. Characterisation of bulk powder failure for flow initiation (quasi-static) is well established. However, bulk flow parameters are all sensitive to strain rate with which the powder is sheared, but in contrast to quasi-static test methods, there is no shear cell for characterisation of the bulk parameters in the dynamic regime. There are only a handful of instruments available for powder rheometry, in which the bulk resistance to motion can be quantified as a function of the shear strain rate, but the challenge is relating the bulk behaviour to the physical and mechanical properties of constituting particles. A critique of the current state of the art in characterisation and analysis of cohesive powder flow is presented, addressing the effects of cohesion, strain rate, fluid medium drag and particle shape.en
dc.description.sponsorshipThe support of the following research programmes is gratefully acknowledged: (i) Virtual Formulation Laboratory Grant of the EPSRC Future Formulation Programme (EP/N025261/1); (ii) Advanced Manufacturing Supply Chains Initiative (AMSCI) and the Medicines Manufacturing Industry Partnership (MMIP), UK, through the funding of the ‘Advanced Digital Design of Pharmaceutical Therapeutics’ (Grant No. 14060); (iii) the EPSRC Programme Grant: Friction: The Tribology Enigma (EP/R001766/1) ; (iv) Project ID 1502-607 funded through ANR (the French National Research Agency) under the “Investissements d’avenir” programme with the reference ANR-10-LABX-001-01 Labex Agro and coordinated by Agropolis Fondation, France, under the frame of I-SITE MUSE (ANR-16-IDEX-0006)en
dc.identifier.citationGhadiri, M., Pasha, M., Nan, W., Hare, C., Vivacqua, V., Zafar, U., Nezamabadi, S., Lopez, A., Pasha, M., & Nadimi, S. (2020). Cohesive powder flow: Trends and challenges in characterisation and analysis. KONA Powder and Particle Journal, 37, 3-18. https://doi.org/10.14356/KONA.2020018
dc.identifier.doi10.14356/KONA.2020018
dc.identifier.eissn2187-5537
dc.identifier.issn0288-4534
dc.identifier.urihttps://hdl.handle.net/20.500.14454/4051
dc.language.isoeng
dc.publisherHosokawa Powder Technology Foundation
dc.rightsCopyright © 2020 The Authors
dc.subject.otherAdditive manufacturing
dc.subject.otherBulk flow
dc.subject.otherCharacterisation
dc.subject.otherCohesive powder
dc.subject.otherFlowability
dc.subject.otherSpreadability
dc.titleCohesive powder flow: trends and challenges in characterisation and analysisen
dc.typereview article
dcterms.accessRightsopen access
oaire.citation.endPage18
oaire.citation.startPage3
oaire.citation.titleKONA Powder and Particle Journal
oaire.citation.volume37
oaire.licenseConditionhttps://creativecommons.org/licenses/by/4.0/
oaire.versionVoR
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