A numerical investigation of central binary collision of droplets

Nikolopoulos, N; Nikas, K-S; Bergeles, G

dc.contributor.author	Nikolopoulos, N	en
dc.contributor.author	Nikas, K-S	en
dc.contributor.author	Bergeles, G	en
dc.date.accessioned	2014-03-01T01:29:35Z
dc.date.available	2014-03-01T01:29:35Z
dc.date.issued	2009	en
dc.identifier.issn	0045-7930	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19322
dc.subject	Experimental Data	en
dc.subject	Finite Volume	en
dc.subject	Kinetic Energy	en
dc.subject	Numerical Solution	en
dc.subject	Surface Energy	en
dc.subject	navier-stokes equation	en
dc.subject	Viscous Dissipation	en
dc.subject	Volume of Fluid	en
dc.subject.classification	Computer Science, Interdisciplinary Applications	en
dc.subject.classification	Mechanics	en
dc.subject.other	Coalescence	en
dc.subject.other	Drop breakup	en
dc.subject.other	Drop formation	en
dc.subject.other	Fluid dynamics	en
dc.subject.other	Navier Stokes equations	en
dc.subject.other	Surface chemistry	en
dc.subject.other	Surface tension	en
dc.subject.other	Viscous flow	en
dc.subject.other	Axi-symmetric	en
dc.subject.other	Binary collisions	en
dc.subject.other	Collision process	en
dc.subject.other	Experimental datum	en
dc.subject.other	Finite volume techniques	en
dc.subject.other	Gaseous phase	en
dc.subject.other	Indicator functions	en
dc.subject.other	Liquid-gas interfaces	en
dc.subject.other	Local grid refinements	en
dc.subject.other	Numerical investigations	en
dc.subject.other	Numerical solutions	en
dc.subject.other	Pinch offs	en
dc.subject.other	Satellite droplets	en
dc.subject.other	Surface energies	en
dc.subject.other	Viscous dissipations	en
dc.subject.other	Volume of fluid methods	en
dc.subject.other	Phase interfaces	en
dc.title	A numerical investigation of central binary collision of droplets	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.compfluid.2008.11.007	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.compfluid.2008.11.007	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	The paper presents a numerical investigation of the central collision of two equal-sized droplets in a gaseous phase. The investigation is based on the numerical solution of the Navier-Stokes equations in their axi-symmetric form using the finite volume technique. The Volume of Fluid Method (V.O.F) is employed for tracking the liquid-gas interface. An adaptive local grid refinement technique developed recently is used in order to increase the resolution around the interface. By using two V.O.F indicator functions the identity of each droplet is preserved and can be detected after droplet contact until coalescence. The results are compared with available experimental data and provide a very detailed picture of the collision process, the ligament formation and dimensions, the pinch off mechanism and the creation of the satellite droplet. The conversion of the droplet's kinetic energy to the surface energy and vise versa, the energy viscous dissipation as well as the maximum deformation of the droplets are also evaluated. (C) 2008 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Computers and Fluids	en
dc.identifier.doi	10.1016/j.compfluid.2008.11.007	en
dc.identifier.isi	ISI:000265401800012	en
dc.identifier.volume	38	en
dc.identifier.issue	6	en
dc.identifier.spage	1191	en
dc.identifier.epage	1202	en