1. Toyota Motor Corporation , 1 Toyota-Cho, Toyota City, Aichi Prefecture 471-8571 , Japan
2. Tohoku University Institute of Fluid Science, , 2-1-1, Katahira, Aoba-ku, Sendai 980-8577 , Japan
3. Honda Motor Co. Ltd. , 3-15-1, Sensui, Asaka-shi, Saitama-ken 351-8555 , Japan