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 metadatas

https://hal-ens-lyon.archives-ouvertes.fr/ensl-00180416
Contributor : Jean-François Pinton <>
Submitted on : Friday, October 19, 2007 - 9:54:17 AM
Last modification on : Friday, May 24, 2019 - 5:25:14 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
  • DOI : 10.1063

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. ⟨10.1063⟩. ⟨ensl-00180416⟩

Share

Metrics

Record views

209

Files downloads

214