Vorticity measurements in turbulent grid flows
β Scribed by E. Kit; A. Tsinober; M. Teitel; J.L. Balint; J.M. Wallace; E. Levich
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- English
- Weight
- 414 KB
- Volume
- 3
- Category
- Article
- ISSN
- 0169-5983
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π SIMILAR VOLUMES
We study vorticity fluctuations in a turbulent von K~rm~n swirling flow generated in the gap between coaxial contrarotating disks. The flow is probed acoustically by an ultrasonic incident wave and the scattered pressure reveals intense vorticity concentrations which occur intermittently in the bulk
The propagation of small disturbances in an annular duct with a mean vortical swirling flow is studied. The disturbance velocity is split into a nearly-convected part and a nearly-sonic part, obeying weakly coupled equations. A normal mode analysis shows that the eigenvalues are segregated into a fi