Abstract: A tidal bore is a positive surge taking place during the flood tide under macro-tidal conditions and the bore represents the leading edge of the tidal wave propagating upstream. The fundamentals of tidal bores remain unknown, although some physical experiments were performed during the last two decades. In this study, some physical modelling was performed to investigate the tidal bore...

Added mass and damping play a significant role in accurate prediction of floating wind turbine (FWT) motions, especially near the resonance frequencies. This paper investigates still-water hydrodynamic characteristics semi-submersible FWT around natural periods surge, heave pitch motion. A higher-fidelity tool (Computational Fluid Dynamics, CFD) based on OpenFOAM is employed numerical computati...

The rotor of floating offshore wind turbines with platform motions may undergo different working states during its operation, e.g. from windmill state to vortex ring and propeller state. In this paper, an aerodynamic model based on a free wake method is used simulate the undergoing surge motion. associated change evaluated quantitatively visually. results show that full cycle motion platform, e...

Sea level, currents, and ice distribution are studied in the Bering Sea during storm events. The ice and ice edge are incorporated into storm surge model. The interaction of wind, ice, and water is expressed by the normal and tangential stresses. A numerical grid is established for the Bering Sea, and a second refined grid is constructed for Norton Sound. Construction of open boundary condition...

This document is included in the Annex of Part 7 as historical background of a well-intentioned task that was completed at too slow a pace, missing its target date for serving as a reference for other in-process IEC standards projects concerned with low-voltage surge-protective devices. For the sake of historical accuracy and perspective, the document is presented here in its draft form, includ...

Several insects require both olfactory and visual cues during odour-source localisation to successfully locate an odour source. In the male silkmoth, Bombyx mori, detection of the female sex pheromone triggers a programmed walking pattern, starting from a surge (straight-line walking) followed by zigzag walking. Although pheromone-triggered behaviour in silkmoths is well understood, the role of...

Finnegan, the Massachusetts Institute of Technology Biomimetic Flapping Foil Autonomous Underwater Vehicle (BFFAUV), was developed to explore the use of two degree of freedom oscillating foils as the sole means of propulsion and maneuvering for an underwater vehicle. Two pairs of foils with 0.4m span x 0.1m chord are used, with one pair forward and one pair aft of the center of gravity, with th...

In an open channel, a sudden rise in water level induces a positive surge, or bore, that may develop as a hydraulic jump in translation. When the surge propagates against an adverse slope, it decelerates until it becomes a stationary hydraulic jump. Both hydraulic jumps and decelerating surges induce some intense turbulent mixing and have some major impact on the sediment transport in natural s...

This article reviews what is known about daily emergency department (ED) surge and ED surge capacity and illustrates its potential relevance during a catastrophic event. Daily ED surge is a sudden increase in the demand for ED services. There is no well-accepted, objective measure of daily ED surge. The authors propose that daily and catastrophic ED surge can be measured by the magnitude of the...

Abstract In order to understand the mechanism of surf-riding/broaching profoundly, four- degree- of-freedom(4DOF) maneuvering equation (surge, sway, yaw and roll) is simplified a one- degree-of-freedom (1DOF) equation, fourth-order Runge-Kutta method used integrate 1DOF surge in time domain analyze two motion states ship during surging surf-riding. The critical Froude number calculated using Me...