1. Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia;
2. Midland Refineries Company, Ministry of Oil, Al Doura, Baghdad, Iraq;
3. Department of Mechanical Engineering, Tufts University, Medford, MA, USA;
4. Department of Mechanical Engineering, Khwaja Fareed University of Engineering & Information Technology, Punjab, Rahim Yar Khan, Pakistan