1. City, University of London, Northampton Square, London EC1V 0HB, U.K.
2. Mechanical Engineering Department, Technological Educational Institute of Thessaly, 41110 Larissa, Greece
3. Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, 637371, Singapore
4. Mechanical Engineering Department, Technological Educational Institute of Piraeus, Thivon 250, Egaleo 122 41, Greece
5. Institute of Experimental Physics, Soft Matter Department, Otto von Guericke University Magdeburg, Universitätsplatz 2, D-39106 Magdeburg, Germany