1. PhD Student, School of Engineering, University of Aberdeen, AB24 3UE Aberdeen, UK(author for correspondence)
2. Lead Engineer Hydrodynamics, Vattenfall Vindkraft A/S, Ørestads Blvd. 108, 2300 Copenhagen, Denmark
3. Lecturer, School of Engineering, University of Aberdeen, AB24 3UE Aberdeen, UK Email: d.a.
4. Professor, School of Engineering, University of Aberdeen, AB24 3UE Aberdeen, UK