1. Department of Mechanical, Materials and Manufacturing Engineering, University of Nottingham, Nottingham NG7 2RD, United Kingdom
2. Linné Flow Centre, KTH Mechanics, KTH Royal Institute of Technology, Stockholm SE-100 44, Sweden
3. School of Mathematical Sciences, University of Nottingham, Nottingham NG7 2RD, United Kingdom
4. Norton Straw Consultants, The Steam Engine House, Darley Abbey Mills, Derby DE22 1DZ, United Kingdom