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Title: Laser induced fluorescence studies of dispersion by breaking waves
Author: Marson, Alan E.
Awarding Body: University of Edinburgh
Current Institution: University of Edinburgh
Date of Award: 2004
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The technique of Planer Laser Induced Fluorescence (PLIF) was applied to investigate the dispersion of surface films by breaking waves. The mixing caused by both isolated single breaking waves and pairs of identical breaking waves was examined. The results have a direct application to the study of dispersion of surface pollutants in the sea. PLIF was used to obtain images of the concentration distribution of a dispersing methanol-rhodamine solution used to mimic a surface film. Experiments were carried out on seven different non-dimensional amplitudes of single breaking wave and three different non-dimensional amplitude of pairs of breaking waves, ranging from mild spilling to large plunging breakers. Spatial and temporal information was extracted form the recorded images in order to quantify the dispersion in terms of maximum depth reached, area covered, centre of mass motion, dispersion coefficients and fractal dimension of the water-dye boundary. The result expanded significantly upon, and compared favourably with, previous work carried out on isolated single breaking waves.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available