Abstract
This study further examines experimentally the motion of an isolated vortex immersed in grid-generated free-stream turbulence. Using a novel analytical procedure, we determined approximately the time history of the vortex axis position from velocity vectors at two locations measured simultaneously with the use of hot-wire anemometry. We identified a long-wavelength, organized, helical motion of the vortex axis, which is present in both low-turbulence and high-turbulence streams, thus pointing to a universal instability mechanism. Free-stream turbulence appears to intensify this instability, while simultaneously enhancing the stochastic motion of the vortex axis.
| Original language | English |
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| State | Published - 2011 |
| Event | 7th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2011 - Ottawa, Canada Duration: Jul 28 2011 → Jul 31 2011 |
Conference
| Conference | 7th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2011 |
|---|---|
| Country/Territory | Canada |
| City | Ottawa |
| Period | 7/28/11 → 7/31/11 |
Bibliographical note
Publisher Copyright:© 2011 International Symposium on Turbulence and Shear Flow Phenomena, TSFP07. All rights reserved.
ASJC Scopus subject areas
- Fluid Flow and Transfer Processes