Alistair Borthwick

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract / Description of output

Over the centuries, tides and, more recently, their power potential have attracted much scientific interest. For example, in 1665, Sir Robert Moray authored a paper in the Philosophical Transactions of the Royal Society on “A Relation of Some extraordinary Tydes in the West-Isles of Scotland”. The present paper takes a historical journey through the scientific developments in our understanding of tides and their power potential, commencing at Ahmedabad in Ancient India, passing through the Dark and Middle Ages, the pre- and post-Newtonian periods, and finally taking us to modern approaches to assessing tidal stream power. A brief description is given of recent developments in tidal assessment for coastal basins, including the representation of tidal devices by enhanced roughness, linear momentum actuator disk theory, and an electrical analogy; and the use of high performance CFD methods to model three-dimensional turbulent swirling flows in the vicinity of axial tidal turbines. Case studies are given of tidal modelling and tidal resource assessments of sites off the Irish, Scottish, and Welsh coasts, which experience some of the strongest tidal flows anywhere in the world. The paper concludes by noting issues yet to be fully resolved, such as tidal parameter uncertainty and the interaction between turbines, turbulence, large-scale eddies, and waves.
Original languageEnglish
Title of host publicationProceedings of 2nd International Conference on Offshore Renewable Energy
Subtitle of host publicationCORE 2016
Publication statusPublished - 2016


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