The long-term goal of our research is to improve our understanding of ripple morphodynamics in wave-current, boundary-layer flows. Our main focus is on the study of sediment transport in oscillatory boundary layers in the presence of unidirectional currents and the associated bed morphology (i.e. 2D and 3D ripples). We hope to improve currently available bed state prediction tools. To this end,...

Present-day understanding of rill dynamics is hampered by a lack of detailed data on velocity distributions in rills. The latter are difficult to collect with traditional techniques due to the very low water depths and the relatively high flow velocities in rills. The objectives of this paper were to investigate the feasibility of miniaturized acoustic Doppler velocimeter (mADV) measurements in...

Flumes have been widely used in water conservancy science and environmental research. It is of great significance to obtain the hydrodynamic characteristics flow field uniformity flume. In this study, a new type annular flume was taken as an example. The 3D simulated by using commercial computational fluid dynamics (CFD) code, also measured acoustic doppler velocimeter (ADV) verify simulation r...

This study investigated vortex-induced vibrations of marine risers in Ocean Thermal Energy Conversion systems. Flume experiments were conducted under two conditions: Condition 1 was with a fixed riser bottom, and 2 bottom on mooring platform. The cross-flow acceleration the measured at different current velocities, corresponding vibration responses analyzed. Numerical simulations based flume em...

Meandering channels with exposed point bars and sinuosities near 2.0 can spontaneously develop in a mix of diatomaceous earth and kaolinite clay. The experimental streams that were studied were as small as 4 cm wide. They showed many of the characteristics found in large meandering streams such as migration of channels, formation of point bars, clay plugs, chutes and bar scrolls. Most of the me...

The focus of the present study is the BBM equation which models unidirectional propagation of small amplitude long waves in shallow water and other dispersive media. Interest will be turned to the two-point boundary value problem wherein the wave motion is specified at both ends of a finite stretch of the medium of propagation. The principal new result is an exact theory of convergence of the t...

(1 State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, 4 China; E-mail: [email protected], author for correspondence) 5 (2 Hydro-environmental Research Centre, School of Engineering, Cardiff University, Cardiff, CF24 3AA, UK; Email: 6 [email protected]) 7 (3 State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan...