Velocity perturbations induced by the longitudinal vortices in a cylinder wake
Journal Article
·
· Journal of Fluids Engineering
- CSIRO, Highett, Victoria (Australia). Div. of Building, Construction and Engineering
- Monash Univ., Clayton, Victoria (Australia). Dept. of Mechanical Engineering
This paper presents data showing the three-dimensional vortical structures in the near wake region of circular cylinders. The in-plane velocity field was measured using a digital Particle Image Velocimetry (PIV) technique. The vortical structures are found to include inclined counter-rotating longitudinal vortices in the braids joining consecutive Karman vortices. A simple vortex-pair model is proposed to estimate velocity perturbation induced by the longitudinal vortices in the near wake region. The perturbation resulting from the longitudinal vortices is shown to induce spanwise velocity modulation and a velocity spike of a nominally two-dimensional vortex street.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 427984
- Journal Information:
- Journal of Fluids Engineering, Journal Name: Journal of Fluids Engineering Journal Issue: 3 Vol. 118; ISSN 0098-2202; ISSN JFEGA4
- Country of Publication:
- United States
- Language:
- English
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