1. Department of Agri-Food Engineering and Biotechnology, Technical University of Catalonia, Av. Canal Olímpic s/n, 08860 Castelldefels (Barcelona), Spain E-mail: oscar.alfranca@upc.edu
2. Department of Hydraulics, Maritime and Environmental Engineering, Technical University of Catalonia, c. Jordi Girona 1–3, 08034 Barcelona, Spain E-mail: joan.garcia@upc.edu