Entry flows of Bingham plastics in expansions

Mitsoulis, E; Huilgol, RR

dc.contributor.author	Mitsoulis, E	en
dc.contributor.author	Huilgol, RR	en
dc.date.accessioned	2014-03-01T01:20:24Z
dc.date.available	2014-03-01T01:20:24Z
dc.date.issued	2004	en
dc.identifier.issn	0377-0257	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/15907
dc.subject	Bingham model	en
dc.subject	Expansion flow	en
dc.subject	Inertia flow	en
dc.subject	Recirculation	en
dc.subject	Viscoplasticity	en
dc.subject	Yield stress	en
dc.subject.classification	Mechanics	en
dc.subject.other	Foamed plastics	en
dc.subject.other	Reynolds number	en
dc.subject.other	Vortex flow	en
dc.subject.other	Yield stress	en
dc.subject.other	Bingham plastics	en
dc.subject.other	Expansion flows	en
dc.subject.other	Fluid mechanics	en
dc.subject.other	fluid flow	en
dc.subject.other	mathematical analysis	en
dc.subject.other	viscoplasticity	en
dc.title	Entry flows of Bingham plastics in expansions	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.jnnfm.2003.10.007	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.jnnfm.2003.10.007	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	Entry flows through abrupt expansions are studied numerically for Bingham plastics exhibiting a yield stress. The Bingham constitutive equation is used with an appropriate modification proposed by Papanastasiou, which applies everywhere in the flow field in both yielded and practically unyielded regions. The emphasis is on determining the extent and shape of yielded/unyielded regions along with the vortex shape, size and intensity for planar and axisymmetric expansion flows for the whole range of Bingham numbers (0 less than or equal to Bn < infinity) and for a wide range of Reynolds numbers (0 less than or equal to Re less than or equal to 200). The results for pressure are used to determine the excess pressure losses that give rise to entrance correction. This correction is expressed as an easy to use equation for quick engineering calculations. (C) 2004 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Journal of Non-Newtonian Fluid Mechanics	en
dc.identifier.doi	10.1016/j.jnnfm.2003.10.007	en
dc.identifier.isi	ISI:000225311700004	en
dc.identifier.volume	122	en
dc.identifier.issue	1-3	en
dc.identifier.spage	45	en
dc.identifier.epage	54	en