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2020 Fiscal Year Final Research Report

A hybrid approach to alluvial streams: towards understanding turbulence modulation by particles

Research Project

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Project/Area Number 17K06573
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Hydraulic engineering
Research InstitutionShizuoka University

Principal Investigator

YOKOJIMA Satoshi  静岡大学, 工学部, 准教授 (80432194)

Co-Investigator(Kenkyū-buntansha) 音田 慎一郎  京都大学, 工学研究科, 准教授 (50402970)
Project Period (FY) 2017-04-01 – 2021-03-31
Keywords移動床流れ / 界面捕獲法 / オイラー・ラグランジュ法 / バセット履歴力 / 2wayカップリング / 埋め込み境界法
Outline of Final Research Achievements

We have worked on (i) development of an unsteady, three-dimensional turbulent flow simulator to reproduce the base flow characteristics of alluvial streams, (ii) pursuit of an accurate interface capturing method to track large surface deformations accurately, (iii) introduction of an Euler-Lagrange approach to particle-laden flows to treat the suspended sediment behavior more reasonably, and (iv) development of an accurate erodible-bed flow simulator by bed-load transport, and have demonstrated the basic capabilities of the methods.

Free Research Field

環境流体力学

Academic Significance and Societal Importance of the Research Achievements

近年、流路の大きな変動を伴う河川災害が多発しており、そのような現象をより正確かつ効率的に予測可能な手法の確立がますます強く求められている。本研究はその一端を担うもので、最先端の計算流体力学的知見を導入することで上述の問題点の解消を試みた。本研究の成果は、同様の課題に取り組む他研究者に有用な知見を提供し、より高精度で高効率な移動床流れ予測法の確立に向けた新たな枠組みを提示している。

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Published: 2022-01-27  

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