Wall effects for motion of spheres in power-law fluids

Missirlis, KA; Assimacopoulos, D; Mitsoulis, E; Chhabra, RP

dc.contributor.author	Missirlis, KA	en
dc.contributor.author	Assimacopoulos, D	en
dc.contributor.author	Mitsoulis, E	en
dc.contributor.author	Chhabra, RP	en
dc.date.accessioned	2014-03-01T01:17:19Z
dc.date.available	2014-03-01T01:17:19Z
dc.date.issued	2001	en
dc.identifier.issn	0377-0257	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14453
dc.subject	power-law model	en
dc.subject	finite-volume method	en
dc.subject	non-orthogonal grid	en
dc.subject	flow around a sphere	en
dc.subject	drag coefficient	en
dc.subject.classification	Mechanics	en
dc.subject.other	Computer simulation	en
dc.subject.other	Drag	en
dc.subject.other	Finite element method	en
dc.subject.other	Finite volume method	en
dc.subject.other	Rheology	en
dc.subject.other	Spheres	en
dc.subject.other	Wall flow	en
dc.subject.other	Flow around spheres	en
dc.subject.other	Non-orthogonal grids	en
dc.subject.other	Power-law models	en
dc.subject.other	Non Newtonian flow	en
dc.subject.other	flow around object	en
dc.subject.other	near-wall flow	en
dc.subject.other	Newtonian fluid	en
dc.subject.other	rheology	en
dc.subject.other	sphere	en
dc.subject.other	wall	en
dc.title	Wall effects for motion of spheres in power-law fluids	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0377-0257(00)00189-0	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0377-0257(00)00189-0	en
heal.language	English	en
heal.publicationDate	2001	en
heal.abstract	The steady motion of spheres representing particles inside tubes filled with different fluids has been investigated using both a finite-element and a finite-volume method. The rheology of the fluids has been modelled by the power-law able to describe the shear-thinning (pseudoplastic) behaviour of a series of polymer solutions. New results have been obtained for a series of tube/sphere diameter ratios in order to investigate the wall effects on the drag exerted by the fluid on the sphere. The results agree well with previous simulations for an unbounded medium (infinite diameter ratio). Experimental investigations have also been carried out and simulated, and the results compare favourably with the experiments. The present simulations revealed the convergence of the drag coefficient to a constant value independent of tube-to-sphere diameter ratio when the power-law index approaches zero. (C) 2001 Elsevier Science B.V. All rights reserved.	en
heal.publisher	Elsevier Science Publishers B.V., Amsterdam, Netherlands	en
heal.journalName	Journal of Non-Newtonian Fluid Mechanics	en
dc.identifier.doi	10.1016/S0377-0257(00)00189-0	en
dc.identifier.isi	ISI:000166701100005	en
dc.identifier.volume	96	en
dc.identifier.issue	3	en
dc.identifier.spage	459	en
dc.identifier.epage	471	en