ISSN:
1434-6036
Keywords:
PACS. 43.30+m Underwater sound - 43.35+d Ultrasonics, quantum acoustics, and physical effects of sound - 47.32-y Rotational flow and vorticity
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract: We report new results on the ultrasonic characterization of a fluid flow using an acoustic time-reversal mirror (TRM). The structure of a large vortex generated by a rotating disk in a hollow cylinder is investigated both inside and below the cylinder. For mean-flow characterization, the TRM is shown to be a powerful vorticity detector. Experimental time-of-flight data are successfully compared to a numerical simulation of the flow and the orthoradial velocity is reconstructed using simple geometrical acoustics. Real-time measurements allow us to extract the precession motion of the vortex, providing direct, non-intrusive, and dynamical information on the flow.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s100510050794
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