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| Titel: |
A Visualization Study of Fluid-Structure Interaction between a Circular Cylinder and a Channel Bed |
| Auteur: |
Rao, S. K. Sumner, D. Balachandar, R. |
| Verschenen in: |
Journal of visualization |
| Paginering: | Jaargang 7 (2008) nr. 3 pagina's 187-199 |
| Jaar: |
2008-07-06 |
| Inhoud: |
Flow visualization was used to study the fluid-structure interaction between a circular cylinder and a shallow turbulent open channel flow. The Reynolds number ranged from R_{eD}=1500–4400 based on the cylinder diameter, and from R_{eH}=7,800–27,600 based on the channel hydraulic radius. The cylinder was mounted vertically on the channel bed and the flow depth-to-cylinder-diameter ratio was varied from d/D=7.0–11.7. Tests were carried out over smooth and rough beds, with the rough beds being either permeable or impermeable. The study showed that the horseshoe vortex forming at the cylinder-bed junction affects many of the flow structures, including the mode of vortex shedding, the shear layer dynamics, the vortex formation length, and the width of the near-wake region. The influence of the horseshoe vortex can be recognized throughout the depth of flow; however, its influence decreases with an increase in distance from the channel bed. It was also possible to discern that the bed roughness resulted in a change to the above interaction and the permeability of the bed resulted in additional changes. |
| Uitgever: |
IOS Press |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 5 van 34 gevonden artikelen
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