A Laser Induced Fluorescence (LIF) technique has been used to measure the effect of surface waves on the dilution of a line plume produced by the merging of buoyant jets discharged from a model outfall. Full-field, time averaged concentration maps were produced of plumes both in wave and still conditions. From these an increase in dilution was found comparable with published values for wave effects on round plumes. The full field nature of the technique also allowed the region of the plume in which the increase in dilution takes place to be clearly identified. LIF and Particle Image Velocimetry (PIV) measurements were also made of a single round buoyant jet discharged into quiescent and simulated wave conditions. Again full-field, time averaged concentration and also velocity maps of the plume were produced and increases in dilution due to wave effects were found to be in line with previously published data. The apparatus allowed LIF measurements to be taken under simulated wave conditions that could be used to produce three dimensional concentration maps of the plume.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:661824 |
| Date | January 2002 |
| Creators | Shawcross, Alistair Charles |
| Publisher | University of Edinburgh |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Source | http://hdl.handle.net/1842/12923 |
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