1. Department of Mechanical Engineering, University of Louisville, 332 Eastern Parkway, Louisville, Kentucky 40292, United States
2. Conn Center for Renewable Energy Research, University of Louisville, 216 Eastern Parkway, Louisville, Kentucky 40208, United States
3. Department of Physics & Astronomy, University of Louisville, 102 Natural Science Building, Louisville, Kentucky 40292, United States
4. Department of Mechanical Engineering, Wichita State University, 1845 Fairmount St, Wichita, Kansas 67260, United States