1. Professor, Dept. of Mechanical Engineering, King Fahd Univ. of Petroleum and Minerals, Dhahran 31261, Saudi Arabia (corresponding author).
2. Postdoctoral Research Fellow, Dept. of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139.
3. Associate Professor, Dept. of Mechanical Engineering, King Fahd Univ. of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
4. Professor, Dept. of Mechanical Engineering, King Fahd Univ. of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.