| EPSRC Reference: |
GR/R27785/01 |
| Title: |
Mechanism of Longitudinal Vortices In Near Wall Turbulent Flow |
| Principal Investigator: |
Chernyshenko, Professor S |
| Other Investigators: |
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| Researcher Co-Investigators: |
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| Project Partners: |
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| Department: |
Faculty of Engineering & the Environment |
| Organisation: |
University of Southampton |
| Scheme: |
Fast Stream |
| Starts: |
02 April 2001 |
Ends: |
01 April 2004 |
Value (£): |
64,911
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| EPSRC Research Topic Classifications: |
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| EPSRC Industrial Sector Classifications: |
| Aerospace, Defence and Marine |
No relevance to Underpinning Sectors |
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Summary on Grant Application Form |
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This project is concerned with longitudinal vortices which probably are the most important organised structures observed in near-wall turbulent flows. Giving rise to other structures known as streaks, longitudinal vortices trigger a sequence of events leading to bursts thus contributing considerably to the generation of turbulent energy. As a result, these structures are responsible for a large share of the drag. Recently, a theory was put forward describing longitudinal vortices as certain instability modes caused by the anisotropy of the normal components of the Reynolds stress tensor. The theory agrees with experiments. This project aims at verifying the theory by direct numerical calculations' and revealing further information on the mechanism of longitudinal vortices. Full Navier-Stokes calculations will be performed for initially fully chaotic motion with zero mean but with realistic distribution of Reynolds normal stresses, and formation of coherent structures will be analysed. Since all other structures are stronger and, hence, more difficult to affect, longitudinal vortices are the natural target of turbulence control techniques. Therefore, this project will be a precursor to future work on enhancing existing methods and developing new methods of drag reduction in turbulent flows.
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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 |