Wake characterization of an undulating membrane tidal energy converter

The downstream wake response of marine current energy converters operating in shallow tidal flows

This paper presents findings from an experimental study investigating the downstream wake response from marine current energy convertors operating in various degrees of vertical flow constraint. The paper investigates deep vertically unconstrained sites, mid-depth sites and there is a particular emphasis on shallow tidal stream sites. Shallow tidal resources could be utilised for the deployment...

Characteristics of Tidal Energy

Atomization of an Undulating Liquid Sheet

This paper presents an experimental study devoted to the understanding of break-up mechanisms of liquid sheets. A shear instability develops at the interface liquid/gas resulting in an undulated motion of the liquid sheet. These undulations trig a Rayleigh-Taylor instability leading to azimuthal thickness modulations. A model including the development of both instabilities allows us to predict ...

Characterization of the Near-Wake of an Ahmed Body Profile

In aerovehicles context, the flow around an Ahmed body profile is simulated using the velocity-vorticity formulation of the Navier-Stokes equations, associated to a penalization method for solids and Large Eddy Simulation for turbulence. The study focuses both on the ground influence on the flow and on the dissymetry of the wake, observed for a ground clearance greater than 10% of the body heig...

Mathematical Problems of Tidal Energy

1. Tidal energy. Recent studies of alternative energy sources have embraced a number of "exotic" forms such as solar, wind, geothermal or tidal energy. Here we shall examine recent developments in the mathematical understanding of tides and tidal power, with particular reference to the Bay of Fundy in eastern Canada which has the highest tides and may be the test site for further development of...