| EPSRC Reference: |
GR/L54448/01 |
| Title: |
THE ROLE OF COHERENT FLOW STRUCTURES IN THE TRANSPORT OF SEDIMENT OVER FLAT BEDS AT HIGH REYNOLDS NUMBER |
| Principal Investigator: |
McEwan, Dr I |
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| Department: |
Engineering |
| Organisation: |
University of Aberdeen |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 December 1997 |
Ends: |
30 June 2001 |
Value (£): |
130,572
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| EPSRC Research Topic Classifications: |
| Coastal & Waterway Engineering |
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| No relevance to Underpinning Sectors |
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Summary on Grant Application Form |
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This project seeks to increase knowledge of turbulent flows through a programme of experiments conducted in hydraulic flumes over mixed grain size sediment beds. Recent research has indicated that turbulent flow contains three dimensional vortices and that the behaviour of such coherent flow structures is important in determining the flow's macroscopic behaviour. During the experiments four factors will be varied - i) flow depth ii) sediment transport rate iii) size distribution of the transported grains and iv) size distribution of the surface grains. The aim of the programme is to assess the influence of these facotrs on the formation and evolution of coherent flow structures and to relate this to grain entrainment and transport.Particle Image Velocimetry will be used to synchronously measure the flow velocities in two orthogonal planes; the first, parallel to and just above the sediment bed, the second, vertical and aligned with with the streamwise direction. Taken together these will provide pseudo three dimensional pictures of the flow. The data collected will be unique because (i) it is pseudo three dimensional (ii) the flows carry mobile sediment (iii) the flows are over irregular surface roughnesses at high Reynolds number.
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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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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.abdn.ac.uk |