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- W2560023483 abstract "The research undertaken for this Ph.D. thesis concerns the dispersion of solutes in sinuous open channelflows. The aim of the work is to address the void in knowledge and understanding of mixing and transportprocesses in natural watercourses. The influences of plan form curvature and non-uniform cross sectionalshape on transverse and longitudinal mixing are specifically addressed.Experimental work was undertaken on the Flood Channel Facility at HR Wallingford Ltd. This involvedcreating a pseudo natural sand channel within the concrete meander plan form of the facility, and thenstabilising the form. Tracer studies using instantaneous injection to investigate longitudinal mixing andcontinuous point source release to study transverse mixing were performed. Fluorescent tracer was used.Measurement was by six Turner Design Field Fluorometers in pump through mode and these weredigitally logged. Detailed hydrodynamic measurements were made using a two-dimensional LaserDoppler Anemometer (LDA) fitted with a 14mm fibre-flow probe.The resulting data has undergone robust analysis and detailed interpretation. The conclusions are that thedominant processes in mixing, in the natural channel form studied, are shear effects. Simple equations forthe prediction of flow fields have been investigated and validated against LDA measurements. It has beenpossible to make accurate predictions of the transverse and longitudinal mixing coefficients from thepredicted flow fields. These predictions have been shown valid for the variations in mixing coefficientsover the meander cycle and with discharge." @default.
- W2560023483 created "2016-12-16" @default.
- W2560023483 creator A5005463592 @default.
- W2560023483 date "2000-01-01" @default.
- W2560023483 modified "2023-09-27" @default.
- W2560023483 title "Dispersion of solutes in sinuous open channel flows." @default.
- W2560023483 hasPublicationYear "2000" @default.
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