Viscous tilting and production of vorticity in homogeneous turbulence

M. Holzner, M. Guala, B. Lüthi, A. Liberzon, N. Nikitin, W. Kinzelbach, A. Tsinober

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

Viscous depletion of vorticity is an essential and well known property of turbulent flows, balancing, in the mean, the net vorticity production associated with the vortex stretching mechanism. In this letter, we, however, demonstrate that viscous effects are not restricted to a mere destruction process, but play a more complex role in vorticity dynamics that is as important as vortex stretching. Based on the results from three dimensional particle tracking velocimetry experiments and direct numerical simulation of homogeneous and quasi-isotropic turbulence, we show that the viscous term in the vorticity equation can also locally induce production of vorticity and changes of the orientation of the vorticity vector (viscous tilting).

Original languageEnglish (US)
Article number005006PHF
Pages (from-to)1-4
Number of pages4
JournalPhysics of Fluids
Volume22
Issue number6
DOIs
StatePublished - Jun 2010

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