Vacuum assisted flow initiation in arching powders

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dc.cclicenceCC-BY-NC-NDen
dc.contributor.authorBaserinia, R.en
dc.contributor.authorSinka, I. C.en
dc.contributor.authorRajniak, P.en
dc.date.acceptance2016-03-26en
dc.date.accessioned2017-10-30T11:39:17Z
dc.date.available2017-10-30T11:39:17Z
dc.date.issued2016-04-07
dc.descriptionThe file attached to this record is the author's final peer reviewed version. The Publisher's final version can be found by following the DOI link.en
dc.description.abstractThe discharge of powders from hoppers usually takes place in open atmosphere. However, in powder pressing industries (e.g. manufacturing of pharmaceutical tablets, detergents, ceramics, powder metallurgy etc.) there are handling operations where powders are filled into closed cavities such as dies. During this process the air pressure is increased as powder is delivered into the die. At the same time typical tablet production equipment creates a suction effect. A critical orifice measurement apparatus was developed to study powder flow initiation from an arching state into an enclosure where the air pressure is reduced. It was shown that a very small reduction of pressure changed the critical orifice diameter significantly. Dimensional analysis was carried out to relate powder properties (particle size and density) and processing parameters (geometry of the system and differential pressure necessary to break the arch). A relationship was developed to calculate the pressure difference necessary to initiate powder flow. The relationship has two empirical parameters which are calibrated by performing simple experiments using the testing rig developed.en
dc.funderN/Aen
dc.identifier.citationBaserinia, R., Sinka, I.C. and Rajniak, P. (2016) Vacuum assisted flow initiation in arching powders. Powder Technology, 301, pp. 493-502en
dc.identifier.doihttps://doi.org/10.1016/j.powtec.2016.03.051
dc.identifier.issn0032-5910
dc.identifier.urihttp://hdl.handle.net/2086/14733
dc.language.isoenen
dc.peerreviewedYesen
dc.projectidN/Aen
dc.publisherElsevieren
dc.researchinstituteInstitute of Engineering Sciences (IES)en
dc.subjectPowder flowen
dc.subjectCritical Orifice Diameteren
dc.subjectArchingen
dc.subjectFlow initiationen
dc.subjectModelen
dc.titleVacuum assisted flow initiation in arching powdersen
dc.typeArticleen

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