Newsletter 2025.2 Index

Theme : "The Conference of Fluid Engineering Division (Part 1)"

Preface
Hyun Jin PARK, Shoichi MATSUDA, Chungpyo HONG
Present to Future of Rocket Propulsion -JAXA Kakuda Space Center Initiatives-
Takeo TOMITA (JAXA)
The 21st Dream contest of the flow　Moment of healing
Shoma HIJIKATA (Meisei University)
Thinking about the SDGs from another point of view
Yui YAMADA, Taichi WATANABE and Haruto KAWATA (Nihon University)
Report of The Dream of Flow Contest
Masashi KAMBE and Taro MATSUSHIMA (Kanazawa University)

The 21st Dream contest of the flow　Moment of healing

Shoma HIJIKATA
Meisei University

Abstract

We participated in the dream contest of the 21st flow held in Nagaoka city, Niigata on November 19, 2024 by the team name of "Meiryusei"."Meiryusei" is the team which consisted of three students of the Meisei University department of science and engineering mechanical engineering system. The theme of the dream contest of the 21st flow "would contribute to achievement of SDGs by the power of the flow". Therefore we produced "the water bed-like massage apparatus" for the purpose of giving all people healing. Here, I want to easily explain about our production. The water bed-like massage apparatus which we produced this time is Fig, 1. I poured water into the cylinder acrylic case of 950mm in height at water level 800mm and attached a rubber film to the upper part. I attached a propeller to the shaft of the 3mm diameter and turned a shaft using a motor and I raised a jet and reproduced massage. It is a propeller that regarded it as important so that we produce a jet at the start. We used a commercial propeller for the beginning, but a vortex has occurred. Therefore it was decided that the propeller makes trial and error with various shapes using 3D-CAD and 3D printer, but did not succeed all. The propeller which we produced this time is Fig, 2. Therefore we thought that it was difficult to produce a jet only by a propeller and decided to regard the pipe which surrounded the propeller in reference to the jet for the commercial water tank as important. The pipe which we produced this time is Fig, 3. In this way, I could produce a jet artificially and succeeded in reproducing a massage function by water hitting the edge of the pipe, and having come to burst into laughter to the vertical direction. I show a jet and the jet for the commercial water tank idealizing which I produced this time in Fig, 4,5. Because this work produced a scale at palm size, there are many points to improve with a scale as whole body size. However, I expect it when used to the massage apparatus which can feel further healing with a whole body if I repeat improvement.