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

Kadja, M; Touzopoulos, D; Bergeles, G

dc.contributor.author	Kadja, M	en
dc.contributor.author	Touzopoulos, D	en
dc.contributor.author	Bergeles, G	en
dc.date.accessioned	2014-03-01T01:52:08Z
dc.date.available	2014-03-01T01:52:08Z
dc.date.issued	2002	en
dc.identifier.issn	0001-5970	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/26575
dc.subject.classification	Mechanics	en
dc.subject.other	DISCRETIZATION	en
dc.subject.other	ALGORITHM	en
dc.subject.other	CHANNELS	en
dc.subject.other	SCHEMES	en
dc.subject.other	PAST	en
dc.title	Numerical investigation of bifurcation phenomena occurring in flows through planar sudden expansions	en
heal.type	journalArticle	en
heal.language	English	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 Re-cr, the latter being the value beyond which flow asymmetry takes place. For Reynolds numbers below Re-cr 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 Re-cr 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.publisher	SPRINGER-VERLAG WIEN	en
heal.journalName	ACTA MECHANICA	en
dc.identifier.isi	ISI:000173559300005	en
dc.identifier.volume	153	en
dc.identifier.issue	1-2	en
dc.identifier.spage	47	en
dc.identifier.epage	61	en