Experimental study on vortical propulsion mechanism of biology locomotion on water surface

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K04257
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 19010:Fluid engineering-related
• Research Institution: Yamagata University
• Principal Investigator: Rinoshika Akira 山形大学, 大学院理工学研究科, 教授 (00253906)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: 生物流体工学 / アメンボ / 渦

Outline of Final Research Achievements

In order to quantitatively elucidate the vortex propulsion mechanism of water-walking organisms, this study aims to clarify the three-dimensional vortex structure and its dynamics under the water surface created by the water strider's legs using PIV and three-dimensional tomographic PIV. reveal. From the perspective of fluid mechanics, we clarified the relationship between the propulsive force or propulsion efficiency of the water strider and the three-dimensional vortex structure it produces, and quantitatively clarified the propulsion mechanism. Furthermore, we quantitatively elucidated the mechanism of the water strider's continuous walking on the water surface and its landing on the water.

Free Research Field

流体工学

Academic Significance and Societal Importance of the Research Achievements

アメンボなどの渦推進メカニズムの新たな解明は、将来的には極めて広い技術分野において新技術開発、環境負荷軽減、省エネルギーなどに寄与しうる。また、本研究は自然に学んだ基礎サイエンスの知見を活かし、「自然」の機能を「ものづくり」に活用するといえる。