The Design Secret of Kyokusui-no-En’s Meandering Channel
Journal of Visualization, Vol. 11, No. 3 (2008) 265-272
Tsubaki, R.*1, and Nakayama, Y,*2 and Fujita, I.*3
*1 Department of Civil Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
E-mail: r.tsubaki@gmail.com
*2 Future Technology Research Institute/ Tokai University, 3-56-2 Higashiohizumi, Nerima-ku, Tokyo
178-0063, Japan.
E-mail: y-naka@mug.biglobe.ne.jp
*3 Department of Civil Engineering, Kobe University, Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan.
E-mail: ifujita@kobe-u.ac.jp
Abstract
The purpose of this study is to investigate the characteristics of the flow through the
Jonangu channel which is used for ceremonial game called as ‘Kyokusui-no-En’ in Japanese. The
geometry of the channel is measured, a visualization technique is used to measure the actual
flow characteristics, and then a numerical flow model is used to represent the flow including
unsteady flow characteristics. Numerical model of drifting cup is introduced to investigate an
interaction between flow and motion of the cup. Finally, the intention of the channel design is
interpreted from the viewpoint of fluid mechanics using observed and calculated results.
Keywords
Kyokusui-no-en, Large-scale PIV, Shallow water, Numerical model, Irregularly
shaped boundary.