Abstract
It is said that the Jomon period began about 12,000 years ago and continued till about 2,500 years ago. The potteries of that age are known as Jomon pottery. Among them, a pottery discovered from the Umataka ruin in Niigata Prefecture in 1931 has an excellent shape. It is said that this pottery was made about 4,500 years ago. Jomon potteries of similar artistic styles have been discovered in various parts in Japan. These potteries have very nice shapes, but the pottery discovered from the Umataka ruin excels other potteries in its excellent proportion. From the shape of lip, it was named “Kaen pottery” meaning “Flame potter”. However, from the patterns of its lip and side wall, it is more appropriate to consider that they are related to water flow. In this report, this hypothesis is made clear by a visualization method using the pollen of cedar and pine trees, and computer simulation.
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Yasuki Nakayama: He received his Ph.D. in Mechanical Engineering from Waseda University in 1963. He joined National Railway Technical Research Institute and conducted many research projects. He then became a Professor of Tokai University, responsible for education and research on fluid mechanics. He received Medal with Purple Ribbon from the Emperor of Japan, and many distinctions and awards for his outstanding research. He was a Visiting Professor of Southampton University, UK, President of the Visualization Society of Japan, and a Director of the Japan Society of Mechanical Engineering. At present, he is serving as President of the Future Technology Research Institute and a Guest Professor of the Japan Healing Science Institute.
Makoto Oki: He received his M.Sc.(Eng.) degree in Mechanical Engineering in 1976 from Tokai University and his Ph.D. in Mechanical Engineering in 2000 from the same university. After obtaining M. Sc. he worked as a system engineer at Japan Advanced Numerical Analysis, Inc.. He then became an Assistant Professor of Tokai University, and currently is an Associate Professor. His current research interests are computational fluid dynamics, computer graphics and internet application.
Katsumi Aoki: He received his M. Sc. (Eng.) degree in Mechanical Engineering in 1967 from Tokai University and his Ph. D. in Mechanical Engineering in 1986 from the same University. After obtaining M. Sc. he worked as a Research Assistant, a Lecturer, and an Associate Professor at Tokai University before taking up his current position as a professor of Tokai University. His current research interest covers flow around a rotating circular cylinder with and without grooves, flow around a rotating sphere, possibility of drag reduction using triangle-type cavity and flow visualization by spark tracing method of complicated flow like in centrifugal blower.
Shinichi Takayama: He received his B. Eng. and M. Eng. Degree in mechanical engineering from Tokai University in 2000 and 2002. Since 2002, he currentry goes on taking doctoral course in Tokai University.
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Nakayama, Y., Oki, M., Aoki, K. et al. Jomon pottery observed from the point of view of fluid mechanics. J Vis 7, 349–356 (2004). https://doi.org/10.1007/BF03181539
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DOI: https://doi.org/10.1007/BF03181539