The effect of vorticity and strain on the evolution of material lines in homogeneous turbulence

Michele Guala*, Alexander Liberzon, Wolfgang Kinzelbach, Beat Lüthi, Arkady Tsinober

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

Abstract

The Lagrangian evolution of infinitesimal material lines is investigated experimentally through three dimensional measurements of particle trajectories (3D-PTV) in quasi homogeneous isotropic turbulence with Re λ = 50. By postprocessing 3D-PTV data obtained by Lüthi et al. (2005) we access the full set of velocity derivatives ∂u i/∂x j which allows for monitoring the evolution of various turbulent quantities along each particle trajectory. The main goal of the present investigation concerns the physical mechanisms that govern the Lagrangian evolution of material lines I. In particular we will focus on the effect of vorticity and strain, respectively, on the orientation and on the stretching of I.

Original languageEnglish
Pages91-94
Number of pages4
StatePublished - 2005
Event4th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 4 - Williamsburg, VA, United States
Duration: 27 Jun 200529 Jun 2005

Conference

Conference4th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 4
Country/TerritoryUnited States
CityWilliamsburg, VA
Period27/06/0529/06/05

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