Dr. Frank Kreith was Professor Emeritus in the Mechanical Engineering Department at the University of Colorado in Boulder. He received his Ph.D. in Applied Science from the University of Paris in 1965. He was a member of the National Academy of Engineering (NAE), a Fellow and Honorary Member of the American Society of Mechanical Engineers (ASME), and recipient of the ASME Medal. His areas of interest included heat transfer, thermal engineering, and solar engineering. He was a consultant in the field of heat transfer engineering in many parts of the world. The ASME International established "The Frank Kreith Energy Award" in 2005 in recognition of his contributions to the field of renewable energy and heat transfer. Dr. Raj. M. Manglik is a Professor of Mechanical Engineering in the College of Engineering and Applied Science at the University of Cincinnati in Ohio. He received his Ph.D. in Mechanical Engineering from Rensselaer Polytechnic Institute. He is a Fellow of the American Society of Mechanical Engineers (ASME) and a senior member of both the American Institute of Chemical Engineers (AIChE) and the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE). He has received many honors and recognitions for seminal research, teaching and educational enterprise, and professional engineering service. His areas of interest are enhancement of heat transfer, interfacial and transport phenomena, and thermal science and energy engineering. He is the Editor-in-Chief of the Journal of Enhanced Heat Transfer.