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粉体摩擦の理論的研究

Research Project

Project/Area Number 11740228
Research Category

Grant-in-Aid for Encouragement of Young Scientists (A)

Allocation TypeSingle-year Grants
Research Field 物性一般(含基礎論)
Research InstitutionKyoto University

Principal Investigator

早川 尚男  京都大学, 大学院・人間・環境学研究科, 助教授 (90222223)

Project Period (FY) 1999 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 2000: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1999: ¥1,400,000 (Direct Cost: ¥1,400,000)
Keywords粉体摩擦 / 離散要素法 / 極性流体 / 偏析 / はねかえり係数 / 粉体 / 摩擦 / ミクロとマクロ / 現象論
Research Abstract

本年は粉体摩擦研究の2年目としてi)離散要素法に基づくシシュレーションと有効理論による粉体摩擦(剪断摩擦)の説明に成功した.ii)粉体の流れでゆっくりした摩擦が支配的である場合に極性流体の解析を進め,球,円柱まわりの極性流の解析・解を与えた.iii)回転ドラム中で摩擦角の差異による偏析の現象論を提出し,偏析のメカニズムを明らかにした.iv)内部摩擦の起源を探るために弾性体における非弾性衝突を数値的に解析し,衝突速度と共にはねかえり係数が減少することを明らかにした。以上の研究成果が論文して発表されている。また極性流体力学によってより早い粉体流の記述が可能になったことも最近挙がりつつある成果である.

Report

(2 results)
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] H.Hayakawa: "Simulation of Granular Friction and Its Effective Theory"Progress of Theoretical Physics : Supplement. 138. 537-542 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Hayakawa: "Slow Viscous Flows in Micropolar Fluids"Physical Review E. 61. 5477-5492 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] S.Puri and H.Hayakawa: "Segregation of Granular Mixtures in a Rotating Drum"Physica A. 290. 218-242 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Hayakawa and H.Kunimaka: "Simulation of the Impact of Two-Dimensional Elastic Disks"Proc.of the 9th Nisshin Engineering Pacticle Techology."Solid Flow Mechanics and their Application". 9. 82-95 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] 早川尚男: "基礎物理としての粉体力学"日本粉体工学会誌. 37. 26-33 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 早川尚男,那須野悟: "現代物理最前線1巻のうち「粉体の物理」"共立出版. 59 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] S,Puri and H.Hayakawa: "Dynamical Behavior of rotated granular mixtures"Physica A. 270. 115-124 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Hisao Hayakawa: "Simple model for granular friction"Physical Review E. 60. 4500-4504 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Hisao Hayakawa: "Simulation of granular friction and its effective theory"Progress of Theoretical Physics:Supplement. 138(印刷中). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Hisao Hayakawa: "Slow viscous flows in micropolar fluids"Physical Review E. 61No.5(印刷中). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 早川 尚男: "基礎物理としての粉体力学"粉体工学会説. 3のNo.1. 26-33 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 西森拓、早川尚男、田口善弘 編集: "物理学論文選集XI 粉粒体の物理学"日本物理学会(社団法人). 124 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 長島順清、早川尚男、那須野悟、岡本宏己: "現代物理最前線"共立出版. 179 (2000)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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