Refined vorticity statistics of decaying rotating three-dimensional turbulence

L.J.A. Bokhoven, van, C. Cambon, L. Liechtenstein, F.S. Godeferd, H.J.H. Clercx

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Abstract

The influence of background rotation on all nontrivial triple correlations of vorticity (VTCs) has been studied for an unbounded incompressible homogeneous turbulent flow, using pseudo-spectral direct numerical simulation. It is found that the time evolutions of the VTCs are in agreement with exact theoretical predictions for rotating turbulence presented herein. Furthermore, the effects of viscosity, initial value of the velocity derivative skewness S0,,, ~and background rotation rate on the vertical vorticity skewness ~ have been thoroughly investigated. The initial growth rate of S~ is found to be proportional to t°7~0’ for all considered cases, in agreement with recent experimental results by Morize et al. [Phys. Fluids 17, 095105 (2005)]. Also, it is found that higher background rotation rates implying more linearity result in lower final values of S,3, while lower viscosities and higher S0,~ (t1~~) both yield higher final values of S~3.
Original languageEnglish
Title of host publicationParticle-laden flow : from geophysical to Kolmogorov scales
Subtitle of host publicationProceedings of the 477th EUROMECH Colloquium on Particle-Laden Flow: from Geophysical to Kolmogorov Scales, June 21-23, 2006, Enschede, The Netherlands
EditorsB.J. Geurts, H.J.H. Clercx, W.S.J. Uijttewaal
Place of PublicationDordrecht
PublisherSpringer
Pages115-127
ISBN (Print)978-1-4020-6217-9
DOIs
Publication statusPublished - 2007
Event477th EUROMECH Colloquium on Particle-Laden Flow: from Geophysical to Kolmogorov Scales, June 21-23, 2006, Enschede, The Netherlands - Enschede, Netherlands
Duration: 21 Jun 200623 Jun 2006

Publication series

NameErcoftac Series
Volume11
ISSN (Print)1382-4309

Conference

Conference477th EUROMECH Colloquium on Particle-Laden Flow: from Geophysical to Kolmogorov Scales, June 21-23, 2006, Enschede, The Netherlands
CountryNetherlands
CityEnschede
Period21/06/0623/06/06

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