To fully understand the performance of tidal stream turbines for the creation of
ocean ren wable energy, a range of computational models is required. We review and
compare results from several models at different length scales. Models under review include blade
element momentum theory (BEMT), blade element actuation disk RANS-CFD, blade- resolved RANS-CFD and
coastal models based on the shallow water equations. Three sets of
experimental results are used for model validation
