Service interruption on Monday 11 July from 12:30 to 13:00: all the sites of the CCSD (HAL, EpiSciences, SciencesConf, AureHAL) will be inaccessible (network hardware connection).
Skip to Main content Skip to Navigation
Journal articles

An acoustic technique for Lagrangian velocity measurements

Abstract : Ultrasonic transducers array can be used to track solid particles advected by a turbulent flow. The simultaneous use of four linear antennas of transducers gives the 3D position of the particles. The extraction of the Doppler frequency shift gives a precise estimation of velocity components. We describe the principle of the technique, the signal conditioning and the acquisition schemes. We show briefly the performances of the technique applied to a turbulent flow at high Reynolds number. The dynamical range of the measurement is over 55 dB and the frequency response spans over 2 decades. These performances allow us to investigate the inertial time scales of Lagrangian turbulence.
Document type :
Journal articles
Complete list of metadata

https://hal-ens-lyon.archives-ouvertes.fr/ensl-00180416
Contributor : Jean-François Pinton Connect in order to contact the contributor
Submitted on : Friday, October 19, 2007 - 9:54:17 AM
Last modification on : Tuesday, May 24, 2022 - 3:28:05 PM
Long-term archiving on: : Monday, September 24, 2012 - 2:10:29 PM

File

RSI_05.pdf
Publisher files allowed on an open archive

Identifiers

  • HAL Id : ensl-00180416, version 1

Citation

Nicolas Mordant, Pascal Metz, Jean-François Pinton, Olivier Michel. An acoustic technique for Lagrangian velocity measurements. Review of Scientific Instruments, American Institute of Physics, 2005, 76 (1), pp.025105. ⟨ensl-00180416⟩

Share

Metrics

Record views

125

Files downloads

201