Numerical investigation of bifurcation phenomena occurring in flows through planar sudden expansions

Kadja, M; Bergeles, G

dc.contributor.author	Kadja, M	en
dc.contributor.author	Bergeles, G	en
dc.date.accessioned	2014-03-01T01:18:06Z
dc.date.available	2014-03-01T01:18:06Z
dc.date.issued	2002	en
dc.identifier.issn	00015970	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14805
dc.subject.other	Algorithms	en
dc.subject.other	Bifurcation (mathematics)	en
dc.subject.other	Expansion	en
dc.subject.other	Reynolds number	en
dc.subject.other	Multigrid algorithms	en
dc.subject.other	Flow of fluids	en
dc.title	Numerical investigation of bifurcation phenomena occurring in flows through planar sudden expansions	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/BF01177050	en
heal.identifier.secondary	http://dx.doi.org/10.1007/BF01177050	en
heal.publicationDate	2002	en
heal.abstract	A new convection scheme along with a multigrid algorithm were used for an in-depth study of bifurcation phenomena which occur in flows through planar sudden expansions. The predicted flow bifurcation parameters compare very well with experiments, especially for Reynolds numbers higher or lower than a critical Reynolds number Recr, the latter being the value beyond which flow asymmetry takes place. For Reynolds numbers below Recr the flow remains symmetric throughout all the period of its development, during which the recirculation lengths increase monotonically with time towards their final stationary values. For Reynolds numbers above Recr the flow changes from a symmetric structure at the beginning to an asymmetric one at the steady state where one of the main recirculation zones becomes longer than the other and a third zone appears on the same side as the short primary recirculation zone.	en
heal.journalName	Acta Mechanica	en
dc.identifier.doi	10.1007/BF01177050	en
dc.identifier.volume	153	en
dc.identifier.issue	1-2	en
dc.identifier.spage	47	en
dc.identifier.epage	61	en