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Article
Attenuation technique for measuring sediment displacement levels
A technique for obtaining accurate, high (spatial) resolution measurements of sediment redeposition levels is described. In certain regimes, the method may also be employed to provide measurements of sediment ...
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Article
A pattern matching technique for measuring sediment displacement levels
This paper describes a novel technique for obtaining accurate, high (spatial) resolution measurements of sediment redeposition levels. A sequence of different random patterns are projected onto a sediment laye...
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Article
The structure of the head of an inertial gravity current determined by particle-tracking velocimetry
Digital particle-tracking velocimetry is used to obtain the two-dimensional structure of the head of inertial gravity currents propagating along a no-slip boundary. The early stage of development of lock-relea...
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Article
The drag on a vertically moving grid of bars in a linearly stratified fluid
We present the results of an investigation of the drag force on a horizontal grid of bars moving vertically through a stratified fluid. A novel approach was used to calculate the drag, based on measurements of...
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Article
A light attenuation technique for void fraction measurement of microbubbles
A non-intrusive technique to measure the two-dimensional distribution of line averaged void fraction in a two-phase flow is discussed. A CCD camera is used to measure the attenuation of light as it passes thr...
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Article
Whole-field density measurements by ‘synthetic schlieren’
This paper outlines novel techniques for producing qualitative visualisations of density fluctuations and for obtaining quantitative whole-field density measurements in two-dimensional density-stratified flow...
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Article
Electrical measurement of sediment layer thickness under suspension flows
This paper reports a new technique to measure the thickness of a layer of deposited sediment as a function of time, independent of the flow conditions or presence of suspended sediment above the layer. Small ...