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Journal Articles Review of Scientific Instruments Year : 2005

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.
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Dates and versions

ensl-00180416 , version 1 (19-10-2007)

Identifiers

  • HAL Id : ensl-00180416 , version 1

Cite

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