Investigation on wave propagation across solid-fluid interface with fluid-structure interaction

2017 Fiscal Year Final Research Report

• Project/Area Number: 26709001
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Materials/Mechanics of materials
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: Inaba Kazuaki 東京工業大学, 環境・社会理工学院, 准教授 (00408725)
• Research Collaborator: KISHIMOTO Kikuo ; TAKAHASHI Kosuke
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 波動伝播 / 流体構造連成 / 水撃 / キャビテーション

Outline of Final Research Achievements

In order to establish the theory of coupled phenomena where a wave propagates from a fluid to a solid or from a solid to a fluid, we have studied on the wave propagation phenomenon at the solid-liquid coupled interface by changing the solid surface conditions and the fluid. For solid to liquid case, we visualized the wave propagation in the water filled pipe and found that the generation of cavitation bubbles varies due to the wettability of the solid surface. For liquid to solid case, the impact force by bubble collapses in the water near the solid wall was inversely analyzed. Furthermore, we conducted cavitation-erosion tests with tensile loads on polymers expected as pump repair materials, and discussed the mechanism of failure and fracture.

Free Research Field

機械工学、材料力学、流体力学、計算工学