| EPSRC Reference: |
GR/R38057/01 |
| Title: |
The Onset of Disturbed-Laminar Flow Over an Oscillating Cylinder |
| Principal Investigator: |
Chaplin, Professor JR |
| Other Investigators: |
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| Researcher Co-Investigators: |
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| Project Partners: |
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| Department: |
School of Civil Eng and The Environment |
| Organisation: |
University of Southampton |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 September 2001 |
Ends: |
29 February 2004 |
Value (£): |
79,960
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| EPSRC Research Topic Classifications: |
| Civil Engineering Materials |
Coastal & Waterway Engineering |
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| EPSRC Industrial Sector Classifications: |
| Construction |
Environment |
| Pharmaceuticals and Biotechnology |
Water |
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| Related Grants: |
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| Panel History: |
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Summary on Grant Application Form |
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The flow around a cylinder oscillating at small amplitude in fluid otherwise at rest is subject to instabilities that trigger first a regime of three-dimensional disturbed-laminar flow, and with increasing amplitudes of motion, turbulence. There is strong evidence to suggest that, in common with other oscillatory flows, existing analytical predictions for the onset of three-dimensionality in this case are unreliable. In the proposed research we aim to investigate the fluid mechanisms that lead to the onset of disturbed-laminar flow for a cylinder oscillating in still fluid and in a weak current (on the scale of reduced velocities), either in-line with, or transverse to the direction of oscillations. It is hoped that the onset of disturbed-laminar flow can be related to previously observed but unexplained changes in the hydrodynamic damping. The stability of the flow over the range 1,000 < beta < 20,000 will be studied by direct numerical simulation, and predictions will be compared with the results of laboratory experiments in the same range, providing flow visualisations and measurements of damping in still water and weak currents.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.soton.ac.uk |