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

^*Corresponding author for this work

Fluid Mechanics and Heat Transfer

Research output: Contribution to conference › Paper › peer-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 language	English
Pages	91-94
Number of pages	4
State	Published - 2005
Event	4th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 4 - Williamsburg, VA, United States Duration: 27 Jun 2005 → 29 Jun 2005

Conference

Conference	4th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 4
Country/Territory	United States
City	Williamsburg, VA
Period	27/06/05 → 29/06/05

Cite this

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title = "The effect of vorticity and strain on the evolution of material lines in homogeneous turbulence",

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.",

author = "Michele Guala and Alexander Liberzon and Wolfgang Kinzelbach and Beat L{\"u}thi and Arkady Tsinober",

year = "2005",

language = "אנגלית",

pages = "91--94",

note = "null ; Conference date: 27-06-2005 Through 29-06-2005",

}

The effect of vorticity and strain on the evolution of material lines in homogeneous turbulence. / Guala, Michele; Liberzon, Alexander; Kinzelbach, Wolfgang et al.

2005. 91-94 Paper presented at 4th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 4, Williamsburg, VA, United States.

Research output: Contribution to conference › Paper › peer-review

TY - CONF

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

Y1 - 2005

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.

UR - http://www.scopus.com/inward/record.url?scp=84867562506&partnerID=8YFLogxK

M3 - הרצאה

AN - SCOPUS:84867562506

SP - 91

EP - 94

Y2 - 27 June 2005 through 29 June 2005

ER -

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

Abstract

Conference

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