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Higher order moments of velocity fluctuations and their gradients in turbulentwall-jets
KTH, School of Engineering Sciences (SCI), Mechanics.
KTH, School of Engineering Sciences (SCI), Mechanics.ORCID iD: 0000-0002-2711-4687
2014 (English)In: Springer Proceedings in Physics, 2014, 17-20 p.Conference paper (Refereed)Text
Abstract [en]

The concept of local isotropy is addressed in a turbulent wall-jet. Direct numerical simulations (DNS) of a reacting turbulent wall-jet flow are used to evaluate the probability density functions (PDF) and higher order moments of the velocity and of the gradient in our set-up, in order to illustrate different aspects of the degree of isotropy at small scales.We observe a strong persistency of small-scale anisotropy up to y/y1/2 ≈ 1.5, where y1/2 is the half width of the jet.

Place, publisher, year, edition, pages
2014. 17-20 p.
Keyword [en]
Jets, Turbulence, Half-width, Higher order moments, Probability density function (pdf), Small scale, Turbulent wall jet, Velocity fluctuations, Probability density function
National Category
Fluid Mechanics and Acoustics
URN: urn:nbn:se:kth:diva-181658DOI: 10.1007/978-3-319-01860-7_3ScopusID: 2-s2.0-84943233030ISBN: 9783319018591OAI: diva2:912374
5th iTi Conference in Turbulence, 2012, 25 April 2012 through 25 April 2012

QC 20160316

Available from: 2016-03-16 Created: 2016-02-02 Last updated: 2016-03-16Bibliographically approved

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Pouransari, ZeinabJohansson, Arne V.
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