Mixing at the external boundary of a submerged turbulent jet

A. Eidelman, T. Elperin, N. Kleeorin, G. Hazak, I. Rogachevskii, O. Sadot, I. Sapir-Katiraie

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We study experimentally and theoretically mixing at the external boundary of a submerged turbulent jet. In the experimental study we use Particle Image Velocimetry and an Image Processing Technique based on the analysis of the intensity of the Mie scattering to determine the spatial distribution of tracer particles. An air jet is seeded with the incense smoke particles which are characterized by large Schmidt number and small Stokes number. We determine the spatial distributions of the jet fluid characterized by a high concentration of the particles and of the ambient fluid characterized by a low concentration of the tracer particles. In the data analysis we use an approach that is based on analysis of the two-point second-order correlation function of the particle number density fluctuations generated by tangling of the gradient of the mean particle number density by the turbulent velocity field. This gradient is formed at the external boundary of a submerged turbulent jet. We demonstrate that the two-point second-order correlation function of the particle number density does not have universal scaling and cannot be described by a power-law function. The theoretical predictions made in this study are in a qualitative agreement with the obtained experimental results.

Original languageEnglish
Title of host publicationProgress in Turbulence III - Proceedings of the iTi Conference in Turbulence 2008
EditorsMartin Oberlack, Joachim Peinke, Alessandro Talamelli
PublisherSpringer Science and Business Media, LLC
Pages211-214
Number of pages4
ISBN (Print)9783642022241
DOIs
StatePublished - 1 Jan 2010
Event3rd Conference on Turbulence, iTi 2008 - Bertinoro, Italy
Duration: 1 Jan 20081 Jan 2008

Publication series

NameSpringer Proceedings in Physics
Volume131
ISSN (Print)0930-8989
ISSN (Electronic)1867-4941

Conference

Conference3rd Conference on Turbulence, iTi 2008
Country/TerritoryItaly
CityBertinoro
Period1/01/081/01/08

ASJC Scopus subject areas

  • General Physics and Astronomy

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