1. Department of Mechanical and Manufacturing Engineering, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus, Division of Biomedical Research, EPOS-Iasis R&D, 5 Karyatidon Street, 2028 Nicosia, Cyprus, Center for Fundamental and Advanced Technical Research, Romanian Academy, Timisoara Branch, Bd. Mihai Viteazul, No. 24, 300223 Timisoara, Romania, and National Center for Engineering of Systems with Complex Fluids, University Politechnica Timisoara, Bd. Mihai Viteazul 1 RO-1900 Timisoara, Romania