1. Mechanical Engineering Department, Engineering Faculty, Bu-Ali Sina University, P.O. Box 65175-4161, Hamedan, Iran
2. University of Michigan-Shanghai Jiao Tong University Joint Institute, Shanghai Jiao Tong University, Shanghai, China
3. Mechanical Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia