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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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 (US)
Title of host publication4th International Symposium on Turbulence and Shear Flow Phenomena
Pages91-94
Number of pages4
Volume1
StatePublished - Dec 1 2005
Event4th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 4 - Williamsburg, VA, United States
Duration: Jun 27 2005Jun 29 2005

Other

Other4th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 4
CountryUnited States
CityWilliamsburg, VA
Period6/27/056/29/05

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    Guala, M., Liberzon, A., Kinzelbach, W., Lüthi, B., & Tsinober, A. (2005). The effect of vorticity and strain on the evolution of material lines in homogeneous turbulence. In 4th International Symposium on Turbulence and Shear Flow Phenomena (Vol. 1, pp. 91-94)