1. (IAHR Member), Research Fellow, School of Engineering, King’s College, University of Aberdeen, Fraser Noble Building, Aberdeen AB24 3UE, UK(author for correspondence)
2. (IAHR Member), Senior Research Fellow, School of Engineering, King’s College, University of Aberdeen, Fraser Noble Building, Aberdeen AB24 3UE, UK
3. (IAHR Member), Professor, School of Engineering, King’s College, University of Aberdeen, Fraser Noble Building, Aberdeen AB24 3UE, UK