1. Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Department of Mechanical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan, and Department of Nuclear and Energy Engineering, Cheju National University, 66 Jejudaehakno, Jejusi, South Korea