Investigating a stretched vortex with ultrafast two-dimensional ultrasonic speckle velocimetry
- 1 June 2001
- journal article
- Published by AIP Publishing in Physics of Fluids
- Vol. 13 (6), 1683-1690
- https://doi.org/10.1063/1.1370388
Abstract
Ultrasonic speckle velocimetry (USV) was recently introduced as a new ultrafast tool for measuring fluid velocities in two dimensions by analyzing the speckle signal backscattered from particles moving with the flow [Sandrin et al., Appl. Phys. Lett. 78, 1155 (2001)]. An experimental study of a stationary stretched vortex is presented, which demonstrates the efficiency of ultrafast 2D USV in terms of quantitative assessment of vortical flows. The full velocity field is recovered and compared to the Burgers model for two different fluids: water and milk. The dependence of the vortex characteristics on the main control parameter is investigated.Keywords
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