1. Department of Mechanical Systems and Design Engineering, Iwaki Meisei University, Iwaki, Fukushima 970-8551, Japan, Faculty of Humanities, Kyushu Lutheran College, Kumamoto 860-8520, Japan, and Fluid Property Section, Material Properties and Metrological Statistics Division, National Metrology Institute of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8563, Japan