| Project/Area Number |
18H05924
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Review Section |
0303:Civil engineering, social systems engineering, safety engineering, disaster prevention engineering, and related fields
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| Research Institution | National Institute of Maritime, Port and Aviation Technology |
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Principal Investigator |
Nakamura Keita 国立研究開発法人海上・港湾・航空技術研究所, 港湾空港技術研究所, 研究官 (00827347)
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| Project Period (FY) |
2018-08-24 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Keywords | 土壌汚染 / NAPL / 多相浸透流解析 / 3相特性曲線モデル / 多相浸透流 / 圧力-飽和土モデル / MPM / 多相流浸透 / Leverettの仮定 / 圧力-飽和度モデル |
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| Outline of Final Research Achievements |
A numerical analysis code by MPM that can represent large deformation problems for continua was developed. Although the goal of this research is to observe microscopically three phases of water-NAPL-air three phase seepage flow phenomenon, we first developed the MPM code to simulate dam break and sand column collapse as the .
Furthermore, in this study, a contact algorithm for two bodies is applied. Therefore, by using the numerical code developed in this research, it is possible to simulate the contact between a rigid body of arbitrary shape and a fluid. In the future, the micro-scale seepage behavior of the fluids in the void space will be simulated by considering interface tension and adhesion of fluids.
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| Academic Significance and Societal Importance of the Research Achievements |
これまで，水，NAPL，空気3相の浸透流問題では，ダルシー則（土粒子間隙内の平均流速）による有限要素法，有限体積法を用いることが多く，間隙流体を直接的に解き，その挙動を観察する研究は例がない。本研究では，微視的な挙動から数値解析を用いて考察を行うことで，間隙流体の浸透メカニズムの解明を試みていることから，学術的価値は高いと考えられる。
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