1. Associate Professor, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong Univ., 800 Dongchuan Rd., Shanghai 200240, China; Visiting Scientist and Chair of Fluid Dynamics, Dept. of Mechanical Engineering, Technische Universität Darmstadt, Otto-Berndt-Str. 2, 64287 Darmstadt, Germany (corresponding author).
2. Professor, Chair of Fluid Dynamics, Dept. of Mechanical Engineering, Technische Universität Darmstadt, Otto-Berndt-Str. 2, 64287 Darmstadt, Germany.
3. Postdoctoral, Institute of Geotechnical Engineering (IGT), Universitaet fuer Bodenkultur, Feistmantelstrasse 4, 1180 Vienna, Austria.
4. Ph.D. Student, Chair of Fluid Dynamics, Dept. of Mechanical Engineering, Technische Universität Darmstadt, Otto-Berndt-Str. 2, 64287 Darmstadt, Germany.