1. Department of Mechanical System Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima 739-8527, Japan, Hawaii Natural Energy Institute, University of Hawaii at Manoa, 1680 East-West Road, POST 109, Honolulu, Hawaii 96822, and Center of Excellence in Particle Technology Faculty of Engineering, Chulalongkorn University, Payathai Road, Patumwan, Bangkok 10330, Thailand