Mixing in Gravity Current Heads Flowing over Rough Surfaces
A two-dimensional full-field quantitative visualization technique is used to assess the mixing that occurs in gravity current heads flowing over rough surfaces. This technique combines small-scale saltwater modelling laser-induced fluorescence and digital image processing to provide information about the mixing behaviour and the associated concentration fields that exist in this density-differentiated fluid mixing system. The effects of surface roughness and initial fluid density difference on flow dynamics and head dilution are examined with potential contributions to the area of heavier-than-air gas (HTAG) dispersion.
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