Vortex dynamics investigation using an acoustic technique
- 1 November 1999
- journal article
- research article
- Published by AIP Publishing in Physics of Fluids
- Vol. 11 (11), 3380-3389
- https://doi.org/10.1063/1.870197
Abstract
A new acoustic technique using the double time-reversal mirrors system and based on geometrical acoustics, is used to study a vortical flow. The interaction between the sound and a vortex is described in details. This technique has been applied to the study of a stretched vortex. This vortex is generated by stretching the vorticity of a boundary layer in a low velocity water channel. It is shown that the velocity field can be reconstructed from the phase distortion of an ultrasonic wave. The technique gives access to a complete characterization of the vortex dynamics, such as the temporal evolution of its size, its circulation and its position.Keywords
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