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Related Experiment Video

Updated: Jul 10, 2026

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions

Published on: February 22, 2018

Small-scale intermittency in anisotropic turbulence.

Wouter J T Bos¹, Lukas Liechtenstein, Kai Schneider

¹MSNMGP, CNRS & CMI, Université de Provence, Marseille, France.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|November 13, 2007

Summary

This summary is machine-generated.

A new flatness measure quantifies intermittency in turbulent flows. This method distinguishes between different types of intermittency, revealing insights into energy distribution in isotropic, rotating, and stratified turbulence.

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Area of Science:

Fluid Dynamics
Turbulence Research
Statistical Mechanics

Background:

Turbulent flows exhibit complex energy dynamics across various scales.
Understanding intermittency is crucial for characterizing turbulent phenomena.
Existing methods struggle to fully capture directional anisotropy in turbulent energy distribution.

Purpose of the Study:

To introduce a novel scale- and direction-dependent flatness measure for analyzing turbulent flows.
To quantify the anisotropy of spatial energy fluctuations in isotropic, rotating, and stratified turbulence.
To differentiate between longitudinal, transversal, horizontal, and vertical intermittency.

Main Methods:

Analysis of isotropic, rotating, and stratified turbulent flows.
Application of a scale- and direction-dependent flatness measure.
Quantification of spatial fluctuation anisotropy in energy distribution across different length scales.

Main Results:

The flatness measure successfully quantifies anisotropy in energy distribution.
Distinction between longitudinal and transversal intermittency, linked to the incompressibility constraint.
Explanation of horizontal vs. vertical intermittency differences in stratified turbulence via Fourier space energy depletion.

Conclusions:

The developed flatness measure provides a robust tool for analyzing turbulent intermittency.
Insights into the role of incompressibility and energy distribution in anisotropic turbulence.
The findings offer a deeper understanding of energy dynamics in stratified turbulent flows.