1. Faculty of Military Science, Stellenbosch University, Private Bag X2, Saldanha 7395, South Africa
2. State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource and Hydropower, Sichuan University, Chengdu 610065, China
3. School of Mathematics and Physics, University of Queensland, St Lucia, Brisbane 4072, Queensland, Australia and Faculty of Engineering Sciences, GIK Institute of Engineering Sciences and Technology, Topi, Swabi, KPK, Pakistan
4. Department of Mechanical Engineering, College of Engineering, Prince Mohammad Bin Fahd University, P.O. Box 1664, Al Khobar 31952, Kingdom of Saudi Arabia