Steady shear banding in complex fluids

Tsenoglou, C; Voyiatzis, E

dc.contributor.author	Tsenoglou, C	en
dc.contributor.author	Voyiatzis, E	en
dc.date.accessioned	2014-03-01T01:29:14Z
dc.date.available	2014-03-01T01:29:14Z
dc.date.issued	2008	en
dc.identifier.issn	0377-0257	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19172
dc.subject	Constitutive instability	en
dc.subject	Non-linear viscoelasticity	en
dc.subject	Poiseuille flow	en
dc.subject	Shear banding	en
dc.subject	Shear thinning	en
dc.subject	Spurt	en
dc.subject.classification	Mechanics	en
dc.subject.other	Approximation theory	en
dc.subject.other	Constitutive equations	en
dc.subject.other	Flow velocity	en
dc.subject.other	Non Newtonian flow	en
dc.subject.other	Pipe flow	en
dc.subject.other	Pressure effects	en
dc.subject.other	Rheology	en
dc.subject.other	Shear deformation	en
dc.subject.other	Viscoelasticity	en
dc.subject.other	Poiseuille flow	en
dc.subject.other	Pressure driven flow	en
dc.subject.other	Shear thinning	en
dc.subject.other	Shear bands	en
dc.subject.other	Approximation theory	en
dc.subject.other	Constitutive equations	en
dc.subject.other	Flow velocity	en
dc.subject.other	Non Newtonian flow	en
dc.subject.other	Pipe flow	en
dc.subject.other	Pressure effects	en
dc.subject.other	Rheology	en
dc.subject.other	Shear bands	en
dc.subject.other	Shear deformation	en
dc.subject.other	Viscoelasticity	en
dc.title	Steady shear banding in complex fluids	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.jnnfm.2007.09.002	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.jnnfm.2007.09.002	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	Shear banding (SB) is manifested by the abrupt ""demixing"" of the flow into regions of high and low shear rate. In this paper, we first relate analytically the rheological parameters of the fluid with the range of shear rates and stresses of SB occurrence. For this, we accept that the origin of shear banding is constitutive, and adopt a non-linear viscoelastic expression able to accommodate the double-valuedness of the stress with flow intensity, under certain conditions. We then implement the model for the case of pressure driven flow through a cylindrical pipe; we derive approximate expressions for the velocity profile in the two-banded regions (core and outer annular), the overall throughput in the presence or absence of ""spurt"", and the radial location limits of the shear rate discontinuity. © 2007 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.2007.09.002	en
dc.identifier.isi	ISI:000256605100010	en
dc.identifier.volume	151	en
dc.identifier.issue	1-3	en
dc.identifier.spage	119	en
dc.identifier.epage	128	en