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Updated: May 14, 2026

Simultaneous Measurement of Turbulence and Particle Kinematics Using Flow Imaging Techniques
10:53

Simultaneous Measurement of Turbulence and Particle Kinematics Using Flow Imaging Techniques

Published on: March 12, 2019

Testing a missing spectral link in turbulence.

Hamid Kellay1, Tuan Tran, Walter Goldburg

  • 1University of Bordeaux, LOMA, UMR 5798, F-33400 Talence, France.

Physical Review Letters
|February 2, 2013
PubMed
Summary
This summary is machine-generated.

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A new theory successfully links turbulent frictional drag to velocity fluctuations, specifically the spectral exponent alpha. This theory holds true for both soap-film and pipe flows, regardless of alpha

Area of Science:

  • Fluid dynamics
  • Turbulence research
  • Non-equilibrium physics

Background:

  • Turbulent flow theories traditionally overlook velocity fluctuations.
  • Frictional drag in turbulent flows remains a complex phenomenon.
  • The spectral exponent (α) characterizes velocity fluctuations.

Purpose of the Study:

  • To test a novel theory connecting frictional drag to the spectral exponent (α).
  • To investigate if this theory applies across different turbulent flow types.

Main Methods:

  • Utilized a unique soap-film channel allowing manipulation of the spectral exponent (α) between 3 and 5/3.
  • Induced turbulence with α = 5/3 by serrating a channel edge.
  • Compared results with ordinary pipe flow data (α = 5/3).

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Published on: November 7, 2016

Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow
13:02

Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow

Published on: February 27, 2016

Related Experiment Videos

Last Updated: May 14, 2026

Simultaneous Measurement of Turbulence and Particle Kinematics Using Flow Imaging Techniques
10:53

Simultaneous Measurement of Turbulence and Particle Kinematics Using Flow Imaging Techniques

Published on: March 12, 2019

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
09:48

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

Published on: November 7, 2016

Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow
13:02

Three-dimensional Particle Tracking Velocimetry for Turbulence Applications: Case of a Jet Flow

Published on: February 27, 2016

Main Results:

  • The new theory accurately predicted frictional drag for both soap-film flows (α=3 and α=5/3) and pipe flows (α=5/3).
  • Demonstrated the theory's validity across different flow regimes and governing equations.

Conclusions:

  • Velocity fluctuations, quantified by the spectral exponent (α), are crucial for understanding turbulent frictional drag.
  • The developed theory offers a unified approach to frictional drag across diverse turbulent flows.