2021 Fiscal Year Final Research Report
Influence of Pore Connectivity on Upscaling Effects of Porous Media Flow
| Project/Area Number |
19H02252
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 22040:Hydroengineering-related
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| Research Institution | Osaka City University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
大友 涼子 関西大学, システム理工学部, 助教 (00726862)
中條 壮大 大阪市立大学, 大学院工学研究科, 准教授 (20590871)
麓 隆行 近畿大学, 理工学部, 教授 (30315981)
竹原 幸生 近畿大学, 理工学部, 教授 (50216933)
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | 多孔質体 / Stokes流れ / 透水試験 / 画像計測 / 流体力学的拡散 / Immersed Boundary Method / 空間ネットワーク |
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| Outline of Final Research Achievements |
It is found through a series of experiments for low-porosity porous media that the aspect ratio of the constituents of the porous media has a significant influence on the permeability test results and that the pore shape and its connectivity affect the hydraulic phenomena, which have been difficult to evaluate so far. In order to evaluate such phenomena more quantitatively, the boundary condition module of the Immersed Boundary Method was newly incorporated and validated by comparing the results with those of hydraulic experiments. In the case of high-porosity porous media, experiments on the migration characteristics of particulate suspensions using microfluidic channels revealed that the spreading of particulates is enhanced or inhibited by the coarse and dense structure of the pores, and that hydrodynamic diffusion can be expressed in a probabilistic manner.
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| Free Research Field |
海岸工学
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| Academic Significance and Societal Importance of the Research Achievements |
内部に多くの間隙を含む多孔質は，利便性・快適性・安全性等の観点から極めて有用な物体であることはよく知られている．その性能・機能は多孔質体を通過する流体の運動と密接な関係があるにも関わらず，それに関する十分な知見はこれまで得られていない．本研究では，多孔質体を空隙体積の小さな低ポロシティ多孔質体と空隙の大きな高ポロシティ多孔質体に分類し，それぞれに対して，実験または数値計算を通して，間隙形状あるいは多孔質体を構成する要素の形状が流体の透過特性に及ぼす影響を検討し，これまで経験的な知見を定量的に評価するに至った．また，更なる検討に必要な数値モデルを開発・拡張を行った．
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