Three-dimensional structure of ordered and chaotic vortex streets behind circular cylinders at low Reynolds numbers
- 1 May 1988
- journal article
- Published by IOP Publishing in Fluid Dynamics Research
- Vol. 3 (1-4) , 127-132
- https://doi.org/10.1016/0169-5983(88)90055-x
Abstract
We have investigated the spatial and temporal structure of certain cases of chaotic and organized vortex shedding in self-excited cylinder wakes at low Reynolds number (40–200) by extending hot-wire measurements to much larger downstream locations than our earlier measurements (Van Atta and Gharib, 1987) and performing concurrent smoke-wire flow visualizations. We describe here results for two cases in which chaotic vortex shedding is observed. The first is the single-vibration frequency locked-in case, in which the most highly disturbed regions of the vortex street, which produce chaotic spectra, are confined to compact spanwise-periodic propagating disturbed regions. The second is the multiple-vibration frequency case in which chaotic velocity spectra are observed at all spanwise locations.Keywords
This publication has 2 references indexed in Scilit:
- Ordered and chaotic vortex streets behind circular cylinders at low Reynolds numbersJournal of Fluid Mechanics, 1987
- Transition and Turbulence in Fluid Flows and Low-Dimensional ChaosPublished by Springer Nature ,1985