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

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

Civil, Environmental, and Geo- Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference 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 language	English (US)
Title of host publication	4th International Symposium on Turbulence and Shear Flow Phenomena
Pages	91-94
Number of pages	4
Volume	1
State	Published - Dec 1 2005
Event	4th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 4 - Williamsburg, VA, United States Duration: Jun 27 2005 → Jun 29 2005

Other

Other	4th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 4
Country/Territory	United States
City	Williamsburg, VA
Period	6/27/05 → 6/29/05

Cite this

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, 4th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 4, Williamsburg, VA, United States, 6/27/05.

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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 L{\"u}thi 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.",

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language = "English (US)",

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T1 - The effect of vorticity and strain on the evolution of material lines in homogeneous turbulence

AU - Guala, Michele

AU - Liberzon, Alexander

AU - Kinzelbach, Wolfgang

AU - Lüthi, Beat

AU - Tsinober, Arkady

PY - 2005/12/1

Y1 - 2005/12/1

N2 - 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.

AB - 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.

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M3 - Conference contribution

AN - SCOPUS:84867562506

VL - 1

SP - 91

EP - 94

BT - 4th International Symposium on Turbulence and Shear Flow Phenomena

T2 - 4th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 4

Y2 - 27 June 2005 through 29 June 2005

ER -

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

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