| EPSRC Reference: |
GR/K78690/01 |
| Title: |
AN INVESTIGATION OF SECONDARY CURRENTS IN A TWO-LAYER DENSITY-STRATIFIED SHEAR FLOW |
| Principal Investigator: |
Shiono, Professor K |
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| Department: |
Civil and Building Engineering |
| Organisation: |
Loughborough University |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 March 1997 |
Ends: |
29 February 2000 |
Value (£): |
138,779
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| EPSRC Research Topic Classifications: |
| Coastal & Waterway Engineering |
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Summary on Grant Application Form |
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The downstream interaction of a bed-generated turbulent boundary-layer with internal waves generated upstream by interfacial shear is frequently observed in partially and strongly stratified macro-tidal estuaries during ebb tide. However, in density-homogeneous flows in compound channels, secondary currents, generated by turbulence anisotropy, can significantly affect lateral mixing and hence dispersion processes along the channel. How does a vertical density stratification in an estuarine situation affect this mixing process? The research investigates this interaction by conducting a combined laboratory scale flume and numerical experiments of a two-layer stratified shear flow. Using Laser Doppler Anemometry (LDA) and a newly developed Laser-Induced Fluorescence (LIF) technique we aim to simultaneously measure the velocity and concentration fields and their turbulent fluxes along the channel to study the secondary circulation and mixing processes, to create benchmark data for the calibration of anisotropic turbulence models in stratified flow conditions and to use this data for testing and refining existing numerical code. The research is expected to shed light on dispersion processes which dominate the ebb phase of macro-tidal estuaries.
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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 |
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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.lboro.ac.uk |