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Numerical prediction method for multi-phase coupled disasters focused on elementary processes

Research Project

Project/Area Number 21K11920
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 60100:Computational science-related
Research InstitutionKyoto University

Principal Investigator

Ushijima Satoru  京都大学, 学術情報メディアセンター, 教授 (70324655)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywords流体固体連成計算 / マルチフェイズモデル / 固気液多相場 / 粒子層内部流動化 / 間隙水圧 / 浸透流 / 並列計算 / マルチグリッド法 / 流体・固体連成計算 / 数値流体力学 / 内部流動化 / 流体固体連成 / 固体間連成 / 礫層内部流動化 / 固液相変化 / 密度流 / 間隙流 / 粘弾性流体 / 固体力学 / 多相連成災害
Outline of Research at the Start

津波・高潮・洪水に伴う土砂・漂流物輸送や,地震時に生ずる砂地盤の液状化などの自然災害は,現象の素過程に着目すると,固気液相が複雑に影響する多相連成現象である.この多相連成現象に対して,マクロな挙動に対する経験則ではなく,現象の力学的素過程を直接再現し,その具体的なメカニズムを解明するための計算力学手法を構築する.

Outline of Final Research Achievements

The aim of this study is to develop a computational methods that can accurately calculate micro-scale fluid-solid interactions (MFSI), such as the mechanical interactions between water flow and soil particles, or liquid flows and superabsorbent polymer particles, by implementing the elementary physical processes in the methods. The following results were obtained in this study:
(1) The processes of internal fluidization and breakdown of a saturated particle layer due to an upward flow of water entering from the bottom were calculated with large-scale parallel computations using the MFSI computational method. As a result, it was confirmed that the effects of particle shapes on particle motions and the unsteady variation of pore water pressure are reasonably calculated.
(2) Since the MFSI computational method requires a large computational load, a multi-grid preprocessing method is introduced to solve the pressure Poisson equations.

Academic Significance and Societal Importance of the Research Achievements

土粒子層の浸透破壊や内部流動化現象などを対象とする計算手法では、これまで粒子スケールの現象、すなわち各粒子の運動や局所的な間隙水圧を正確に扱う手法はほとんどなく、対象領域全体を連続体などとして扱う手法が多かった。本研究では、流体固体連成現象の素過程に着目し、これを計算手法に組み込み、大規模並列計算を利用することにより、多相場が連成する災害現象の基本的な部分をある程度正確に評価できる計算手法を構築した。実験との比較により、粒子形状の影響や間隙水圧の変化が再現できることが示された。また、マルチグリッド前処理法を圧力計算に組み込むことにより、大規模並列計算をより効率的に行うことを可能にした。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (25 results)

All 2024 2023 2022 2021

All Journal Article (11 results) (of which Peer Reviewed: 11 results,  Open Access: 7 results) Presentation (14 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] PRESSURE COMPUTATIONS OF INCOMPRESSIBLE DENSITY FLOW ON COLLOCATED GRID USING 3D MULTIGRID PRECONDITIONING2024

    • Author(s)
      MOTONISHI Ryota、USHIJIMA Satoru
    • Journal Title

      Japanese Journal of JSCE

      Volume: 80 Issue: 15 Pages: n/a

    • DOI

      10.2208/jscejj.23-15020

    • ISSN
      2436-6021
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Numerical Prediction of Water-ice Phase-change with Natural Convection Including Density Inversion Region2023

    • Author(s)
      西本 和貴、鳥生 大祐、牛島 省
    • Journal Title

      Transaction of the Japan Society for Simulation Technology

      Volume: 15 Issue: 1 Pages: 27-35

    • DOI

      10.11308/tjsst.15.27

    • ISSN
      1883-5031, 1883-5058
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] FLUID-SOLID INTERACTION COMPUTATIONS FOR INTERNAL FLUIDIZATION IN SATURATED GRANULAR BED2023

    • Author(s)
      USHIJIMA Satoru、TORIU Daisuke、MAKI Shiho
    • Journal Title

      Japanese Journal of JSCE

      Volume: 79 Issue: 15 Pages: n/a

    • DOI

      10.2208/jscejj.22-15032

    • ISSN
      2436-6021
    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] EULERIAN-LAGRANGIAN APPROACH FOR INTERACTIONS BETWEEN FLUIDS AND MULTIPLE DEFORMABLE SWELLING OBJECTS USING MASS-SPRING MODEL2023

    • Author(s)
      GUINEA Niku、TORIU Daisuke、USHIJIMA Satoru
    • Journal Title

      Journal of JSCE

      Volume: 11 Issue: 2 Pages: n/a

    • DOI

      10.2208/journalofjsce.22-15025

    • ISSN
      2187-5103
    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] PRECONDITIONING FOR PRESSURE COMPUTATIONS IN NUMERICAL PREDICTIONS OF DENSITY CURRENTS2023

    • Author(s)
      MOTONISHI Ryota、USHIJIMA Satoru
    • Journal Title

      Japanese Journal of JSCE

      Volume: 79 Issue: 15 Pages: n/a

    • DOI

      10.2208/jscejj.22-15029

    • ISSN
      2436-6021
    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] MULTIPHASE COMPUTATION METHOD FOR FREEZING AND MELTING OF WATER WITH NATURAL CONVECTION INCLUDING DENSITY INVERSION REGION2023

    • Author(s)
      NISHIMOTO Kazuki、MOTONISHI Ryota、TORIU Daisuke、USHIJIMA Satoru
    • Journal Title

      Japanese Journal of JSCE

      Volume: 79 Issue: 15 Pages: n/a

    • DOI

      10.2208/jscejj.22-15022

    • ISSN
      2436-6021
    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Computation of Electric Charged Micro-particles and Fluid Flows in Filtration Process2022

    • Author(s)
      廣岡 信行、牛島 省
    • Journal Title

      Transaction of the Japan Society for Simulation Technology

      Volume: 14 Issue: 2 Pages: 96-103

    • DOI

      10.11308/tjsst.14.96

    • ISSN
      1883-5031, 1883-5058
    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Computational Method for Interactions between Deformable Objects and Fluid Flows Using Immersed Boundary Method and Mass Spring Model2022

    • Author(s)
      グイネア ニク、鳥生 大祐、牛島 省
    • Journal Title

      Transaction of the Japan Society for Simulation Technology

      Volume: 14 Issue: 2 Pages: 78-84

    • DOI

      10.11308/tjsst.14.78

    • ISSN
      1883-5031, 1883-5058
    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Numerical prediction of water-ice phase-change with natural convection including density inversion region2022

    • Author(s)
      Kazuki Nishimoto, Daisuke Toriu and Satoru Ushijima
    • Journal Title

      JSST 2022 Student Session Proceedings

      Volume: JSST 2022 Pages: 17-20

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Numerical experiments of swelling objects interacting with Newtonian fluids2022

    • Author(s)
      Niku Guinea, Daisuke Toriu and Satoru Ushijima
    • Journal Title

      JSST 2022 Student Session Proceedings

      Volume: JSST 2022 Pages: 57-60

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] COMPUTATIONS OF VISCOELASTIC FLUIDS WITH FREE SURFACE BASED ON FINITE VOLUME METHOD IN THE COLLOCATED GRID SYSTEM2021

    • Author(s)
      KUKI Atomu、TORIU Daisuke、USHIJIMA Satoru
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. A2 (Applied Mechanics (AM))

      Volume: 77 Issue: 2 Pages: I_129-I_136

    • DOI

      10.2208/jscejam.77.2_I_129

    • NAID

      130008150500

    • ISSN
      2185-4661
    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 水中に投下された高吸水性ポリマー粒子の膨潤過程の3次元数値計算2023

    • Author(s)
      牛島 省, グイネア ニク, 芝 隆宏, 鈴木 一充, 松原 佑介
    • Organizer
      第26回応用力学シンポジウム概要集
    • Related Report
      2023 Annual Research Report
  • [Presentation] QSIスキームとMultigrid前処理圧力解法を用いた3次元非圧縮性流体のスレッド並列計算2023

    • Author(s)
      本西 亮太, 牛島 省
    • Organizer
      第26回応用力学シンポジウム概要集
    • Related Report
      2023 Annual Research Report
  • [Presentation] 粒子層内部流動化に伴う粒子運動と流体物理量に関する粒子スケール流体・固体連成数値計算2023

    • Author(s)
      牛島 省, 牧 志峰, 鳥生 大祐
    • Organizer
      第26回応用力学シンポジウム概要集
    • Related Report
      2023 Annual Research Report
  • [Presentation] Particle-Scale and Macro-Scale Computations on the Swelling Process of Superabsorbent Polymer Particles2023

    • Author(s)
      Niku Guinea, Satoru Ushijima, Takahiro Shiba, Kazumitsu Suzuki and Yusuke Matsubara
    • Organizer
      JSST 2023 Student Session Proceedings
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 相平均モデルによる密度逆転領域を含む水の自然対流と凍結・融解現象の数値解析2023

    • Author(s)
      西本 和貴, 本西 亮太, 鳥生 大祐, 牛島 省
    • Organizer
      京都大学第17回ICTイノベーション, 2023
    • Related Report
      2022 Research-status Report
  • [Presentation] バネ質点モデルで表される変形・膨張する複数固体と流体の連成現象に対する オイラー・ラグランジュ解法2022

    • Author(s)
      グイネア ニク, 鳥生 大祐, 牛島 省
    • Organizer
      第25回土木学会応用力学シンポジウム概要集, 2B07-12-02
    • Related Report
      2022 Research-status Report
  • [Presentation] 水の密度逆転領域を含む自然対流と凍結・融解の多相場数値解法2022

    • Author(s)
      西本 和貴, 本西 亮太, 鳥生 大祐, 牛島 省
    • Organizer
      第25回土木学会応用力学シンポジウム概要集, 2B07-12-02
    • Related Report
      2022 Research-status Report
  • [Presentation] 底面から流入する鉛直上昇水流による礫層破壊の流体・固体連成計算2022

    • Author(s)
      牧 志峰, 大野 絢平, 鳥生 大祐, 牛島 省
    • Organizer
      第25回土木学会応用力学シンポジウム概要集, 2B19-24-05
    • Related Report
      2022 Research-status Report
  • [Presentation] 密度流の数値解析における圧力計算の前処理法2022

    • Author(s)
      本西 亮太, 鳥生 大祐, 牛島 省
    • Organizer
      第25回土木学会応用力学シンポジウム概要集, 2B25-30-02
    • Related Report
      2022 Research-status Report
  • [Presentation] 鉛直上昇流による礫層内部流動化と破壊の流体・固体連成計算2021

    • Author(s)
      牛島 省, 上野 友登, 鳥生 大祐, 大野 絢平
    • Organizer
      第24回土木学会応用力学シンポジウム概要集, S02E-01
    • Related Report
      2021 Research-status Report
  • [Presentation] コロケート格子有限体積法に基づく粘弾性流体の数値計算2021

    • Author(s)
      九鬼 愛夢, 鳥生 大祐, 牛島 省
    • Organizer
      第24回土木学会応用力学シンポジウム概要集, S02E-04
    • Related Report
      2021 Research-status Report
  • [Presentation] Computation of micro-particle dynamics in a filtration process with the coulomb interaction2021

    • Author(s)
      Nobuyuki Hirooka and Satoru Ushijima
    • Organizer
      JSST 2021 Student Session Proceedings, pp. 32-35
    • Related Report
      2021 Research-status Report
  • [Presentation] Computational method for interactions between deformable objects and fluid flows using immersed boundary method and mass spring model2021

    • Author(s)
      Niku Guinea, Daisuke Toriu and Satoru Ushijima
    • Organizer
      JSST 2021 Student Session Proceedings, pp. 73-76
    • Related Report
      2021 Research-status Report
  • [Presentation] Particle-scale FSI computation for internal fluidization in gravel-particle bed by upward water jet2021

    • Author(s)
      Satoru Ushijima, Junpei Ohno, Daisuke Toriu and Yuto Ueno
    • Organizer
      JSST 2021 Student Session Proceedings, pp. 42-45
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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