On creeping drag flow of a viscoplastic fluid past a circular cylinder: Wall effects

Mitsoulis, E

dc.contributor.author	Mitsoulis, E	en
dc.date.accessioned	2014-03-01T01:21:09Z
dc.date.available	2014-03-01T01:21:09Z
dc.date.issued	2004	en
dc.identifier.issn	0009-2509	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16099
dc.subject	Bingham plastic	en
dc.subject	Drag coefficient	en
dc.subject	Flow past a cylinder	en
dc.subject	Viscoplasticity	en
dc.subject	Wall effects	en
dc.subject	Yield stress	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.other	Computer simulation	en
dc.subject.other	Creep	en
dc.subject.other	Cylinders (shapes)	en
dc.subject.other	Finite element method	en
dc.subject.other	Mathematical models	en
dc.subject.other	Plates (structural components)	en
dc.subject.other	Drag flow	en
dc.subject.other	Viscoplastic fluids	en
dc.subject.other	Drag	en
dc.subject.other	creep	en
dc.subject.other	drag	en
dc.subject.other	finite element method	en
dc.subject.other	mathematical analysis	en
dc.subject.other	modeling	en
dc.subject.other	viscoplastic flow	en
dc.title	On creeping drag flow of a viscoplastic fluid past a circular cylinder: Wall effects	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.ces.2003.09.041	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.ces.2003.09.041	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	The creeping drag flow of a Bingham plastic past a circular cylinder kept symmetrically between parallel plates was analyzed via numerical simulations with the finite element method. Different gap/cylinder diameter ratios have been studied ranging from 2:1 to 50:1. 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 drag coefficient for a wide range of Bingham numbers. The present results extend previous analyses for creeping drag flow past a cylinder in an infinite medium based on variational principles and provide calculations of the drag coefficient around a cylinder in the case of wall effects. (C) 2003 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Chemical Engineering Science	en
dc.identifier.doi	10.1016/j.ces.2003.09.041	en
dc.identifier.isi	ISI:000220302900006	en
dc.identifier.volume	59	en
dc.identifier.issue	4	en
dc.identifier.spage	789	en
dc.identifier.epage	800	en