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Journal articles
Investigation of characteristic scales in variable density turbulent jets using a second-order model
Abstract : This paper is concerned with the investigation of characteristic turbulent scales in circular and plane turbulent free jets with large density variations. The numerical study has been performed with a second-order turbulence model to confirm analytical relations about density and Reynolds number effects on dynamic and scalar turbulence scales derived from requirements of pseudo-self-preservation. The present results explain and quantify trends previously reported from visualizations of variable density turbulent jets performed by Pitts (NBSIR Report No. 86-3340, U.S. Department of Commerce, 1986). It is clearly shown that the parameter relevant for the evolution of these scales is the momentum flux Mj . In addition, the influence of this quantity on small scales is found to be larger than that on large scales.
https://hal-ineris.archives-ouvertes.fr/ineris-00962572
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Submitted on : Friday, March 21, 2014 - 1:26:46 PM
Last modification on : Thursday, March 10, 2022 - 3:58:07 PM
Contributor : Gestionnaire Civs Connect in order to contact the contributor
Submitted on : Friday, March 21, 2014 - 1:26:46 PM
Last modification on : Thursday, March 10, 2022 - 3:58:07 PM