McGovern, David and Ilic, Suzana and Folkard, Andrew and McClelland, Stuart and Murphy, Brendan (2009) Turbulence and shear stress around offshore wind turbine pile in tidal currents using particle image velocimetry. In: Proceedings of Coastal Dynamics 2009 : impacts of human activities on dynamic coastal processes. World Scientific Publishing, JPN. ISBN 9789814282468
Full text not available from this repository.Abstract
The three-dimensional spatial characteristics of velocity and turbulence of tidal flow around an offshore wind turbine model have been measured using the technique of Particle Image Velocimetry, (PIV). This approach allows for the instantaneous velocity measurement in large volumes of water. This paper presents analysis of velocity and turbulence parameters in the wake flow behind a cylinder for different tidal stages. The wake flow behind a cylinder is highly complex making it difficult to characterise using point measurement techniques in the laboratory, and model numerically. The PIV measurements enabled the derivation of detailed velocity vector maps, turbulence intensities, kinetic energy and Reynolds stresses across the water column. Results showed a clear flow separation zone between reversed and stream-wise flow in the wake, the structure of which depends on flow velocity and water depth.