• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Development and application of computational method for transport of non-spherical particles in gas-solid fluidized bed with large temperature difference

Research Project

Project/Area Number 19K20284
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Daisuke Toriu  京都大学, 学術情報メディアセンター, 助教 (60772572)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords流体・固体熱連成 / 低マッハ数圧縮性流れ / 流動層 / 音速抑制法 / 直交格子法 / 熱対流 / 陽解法 / 高温度差 / マルチフェイズモデル / 圧縮性流体 / 固気流動層 / 並列計算
Outline of Research at the Start

本研究では,高温の固気流動層内における非球形粒子の挙動を明らかにするために,低マッハ数圧縮性流れと非球形粒子の力学・熱連成計算手法を開発する.本手法では,広範な温度差の問題に適用するために気体の圧縮性を考慮する.また,流体計算はオイラー格子上で行う一方で,固体粒子形状は四面体要素の集合体として表現され,この四面体要素と接触判定球を用いて各粒子に働く流体力,接触力を計算する.以上の手法を用いて大規模数値実験を行い,非球形粒子層の流動化メカニズムや流動状態での伝熱機構について詳細な検討を行う.加えて,工学上の実用問題(例えば粉体乾燥など)に開発した手法を適用し,その応用性についても検討を行う.

Outline of Final Research Achievements

In this study, a computational method for interactions between low Mach number flows and arbitrary shaped particles is developed to conduct particle scale computations for the transport of non-spherical particles in gas-solid fluidized beds with large temperature differences. The fractional step method with the reduced speed of sound technique is used for fluid computations, and a Cartesian grid method with the DF/FD method is used for computations of fluid-solid interactions. Several numerical experiments were conducted to confirm basic characteristics of the proposed method. The computational results show that the proposed method can accelerate computations while keeping the impact on the computational results sufficiently small by setting appropriate parameters to reduce the speed of sound, and that can stably calculate particle transport phenomena due to flows with large temperature differences about 100 ℃.

Academic Significance and Societal Importance of the Research Achievements

複雑な流動層の流動化メカニズムを解明するために,近年では固体粒子よりも十分に小さい流体計算格子を設定し,粒子周りの微視的な流れと粒子個々の運動を直接計算する手法が検討されている.しかし,大きな温度変化による気体の密度変化(圧縮性)や固体粒子形状の影響を考慮したものは少ない.本研究で開発した手法を発展させることで,これらの影響を考慮しつつ高温固気流動層内の微視的な温度分布や流速分布,各粒子に働く流体力や接触力など,実験では得ることの難しい精緻なデータの取得が可能となることが期待される.

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (7 results)

All 2022 2021 2020 2019

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (6 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Computational method for low-Mach-number compressible flows with moving particles and large temperature variations2022

    • Author(s)
      D. Toriu, S. Ushijima
    • Journal Title

      Journal of Advanced Simulation in Science and Engineering

      Volume: 9 Issue: 1 Pages: 170-184

    • DOI

      10.15748/jasse.9.170

    • ISSN
      2188-5303
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Presentation] Fully explicit computational method for gas-solid two-phase flow with large temperature variation2021

    • Author(s)
      D. Toriu, S. Ushijima
    • Organizer
      JSST2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 音速抑制法を用いた高温自然対流と固体の熱連成計算2020

    • Author(s)
      鳥生 大祐, 牛島 省
    • Organizer
      第34回数値流体力学シンポジウム
    • Related Report
      2020 Research-status Report
  • [Presentation] Pressure-based algorithm for compressible fluid without low-Mach-number approximation2020

    • Author(s)
      Wei Liu, Daisuke Toriu, Satoru Ushijima
    • Organizer
      第34回数値流体力学シンポジウム
    • Related Report
      2020 Research-status Report
  • [Presentation] 高温度差のキャビティ内自然対流に対する圧縮・非圧縮性流体計算法の比較2019

    • Author(s)
      劉 威, 鳥生 大祐, 牛島 省
    • Organizer
      第65回理論応用力学講演会・第22回土木学会応用力学シンポジウム
    • Related Report
      2019 Research-status Report
  • [Presentation] Computational methods to improve CFL conditions in low-Mach-number compressible flows2019

    • Author(s)
      W. Liu, D. Toriu, S. Ushijima
    • Organizer
      第24回計算工学講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] Fully explicit computational method for thermal interactions between solids and compressible low Mach number gas flows2019

    • Author(s)
      D. Toriu, S. Ushijima
    • Organizer
      JSST2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2019-04-18   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi