Evolution of geometric structures in intense turbulence

Abstract

We report measurements of the evolution of lines, planes, and volumes in an intensely turbulent laboratory flow using high-speed particle tracking. We find that the classical characteristic time scale of an eddy at the initial scale of the object considered is the natural time scale for the subsequent evolution. The initial separation may only be neglected if this time scale is much smaller than the largest turbulence time scale, implying extremely high turbulence levels.

10 pages, 6 figures, added more details

References in corpus (6)

• Particles and fields in fluid turbulence
• Measurement of Particle Accelerations in Fully Developed Turbulence
• Lagrangian Tetrad Dynamics and the Phenomenology of Turbulence
• Relative dispersion in fully developed turbulence: The Richardson's Law and Intermittency Corrections
• Lagrangian statistics of particle pairs in homogeneous isotropic turbulence
• Multi-particle dispersion in fully developed turbulence

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• An accurate and efficient Lagrangian sub-grid model
• Inertial particle acceleration in strained turbulence
• Multi-particle Lagrangian statistics in homogeneous rotating turbulence
• Path lengths in turbulence
• Lagrangian view of time irreversibility of fluid turbulence