TWO-PHASE FLOWS OF DROPLETS IN CONTRACTIONS AND DOUBLE BENDS

Christafakis, AN; Tsangaris, S

dc.contributor.author	Christafakis, AN	en
dc.contributor.author	Tsangaris, S	en
dc.date.accessioned	2014-03-01T01:57:38Z
dc.date.available	2014-03-01T01:57:38Z
dc.date.issued	2008	en
dc.identifier.issn	1994-2060	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/28460
dc.subject	level-set method	en
dc.subject	two-phase flow	en
dc.subject	deformation of droplets	en
dc.subject	contraction	en
dc.subject	double bend	en
dc.title	TWO-PHASE FLOWS OF DROPLETS IN CONTRACTIONS AND DOUBLE BENDS	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	Transient two-phase liquid-liquid flows of Newtonian fluid droplets in a primary Newtonian fluid with different viscosities, through constricted channels and double-bend channels, are numerically modelled and studied. The deformation and migration of various arrangements (arrays) of droplets, as they are carried by the primary phase into the low Reynolds number (Re), developing Hagen-Poiseuille laminar flow, is computed and discussed on the basis of the non-dimensional numbers: Capillary number (Ca), Reynolds number (Re), Weber number (We) and viscosity ratio (lambda). The observations are well compared with the results of the literature. To predict the contours of droplets, we implement a level-set method (LSM) for capturing interfaces with high order WENO and TVD Runge-Kutta schemes. The LSM implicitly provides the conditions for the revised, nearly second-order, two-phase, time-dependent, 2-D Navier-Stokes momentum equations' solver, incorporating viscous and surface tension terms depending on the level-set function.	en
heal.publisher	HONG KONG POLYTECHNIC UNIV, DEPT CIVIL & STRUCTURAL ENG	en
heal.journalName	ENGINEERING APPLICATIONS OF COMPUTATIONAL FLUID MECHANICS	en
dc.identifier.isi	ISI:000207527100005	en
dc.identifier.volume	2	en
dc.identifier.issue	3	en
dc.identifier.spage	299	en
dc.identifier.epage	308	en