Mixing of a passive scalar near a free surface

Shen, L; Triantafyllou, GS; Yue, DKP

dc.contributor.author	Shen, L	en
dc.contributor.author	Triantafyllou, GS	en
dc.contributor.author	Yue, DKP	en
dc.date.accessioned	2014-03-01T01:16:45Z
dc.date.available	2014-03-01T01:16:45Z
dc.date.issued	2001	en
dc.identifier.issn	1070-6631	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14198
dc.subject.classification	Mechanics	en
dc.subject.classification	Physics, Fluids & Plasmas	en
dc.subject.other	Computer simulation	en
dc.subject.other	Fluid mechanics	en
dc.subject.other	Navier Stokes equations	en
dc.subject.other	Free surfaces	en
dc.subject.other	Turbulent flow	en
dc.subject.other	mixing	en
dc.subject.other	Navier-Stokes equations	en
dc.subject.other	passive scalar	en
dc.subject.other	shear flow	en
dc.subject.other	turbulence	en
dc.title	Mixing of a passive scalar near a free surface	en
heal.type	journalArticle	en
heal.identifier.primary	10.1063/1.1350898	en
heal.identifier.secondary	http://dx.doi.org/10.1063/1.1350898	en
heal.language	English	en
heal.publicationDate	2001	en
heal.abstract	We study numerically and analytically the mixing of a passive scalar in turbulent shear flow with a free surface. The Navier-Stokes and scalar mixing equations are solved by direct numerical simulation. We find that the mean concentration of the scalar exhibits a two-layer structure near the free surface: an outer layer, characterized by a fast reduction in the value of the turbulent diffusivity of the scalar, and a much thinner inner layer characterized by a fast reduction of the mean concentration gradient. We develop a similarity theory for the variation of the mean concentration, which agrees very well with the numerical results and provides us with scaling relations for the thickness of each layer. (C) 2001 American Institute of Physics.	en
heal.publisher	AMER INST PHYSICS	en
heal.journalName	Physics of Fluids	en
dc.identifier.doi	10.1063/1.1350898	en
dc.identifier.isi	ISI:000167499400012	en
dc.identifier.volume	13	en
dc.identifier.issue	4	en
dc.identifier.spage	913	en
dc.identifier.epage	926	en