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Numerical Simulator for Hydrodynamic Lubrication by Particle-based Method

Research Project

Project/Area Number 20K04236
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 18040:Machine elements and tribology-related
Research InstitutionTokyo University of Marine Science and Technology

Principal Investigator

Kentaro Tanaka  東京海洋大学, 学術研究院, 教授 (60359693)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2023: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords流体潤滑 / 表面張力振動 / 液体架橋破断 / 粒子法 / 表面張力 / 微小液滴 / 数値流体 / 枯渇潤滑
Outline of Research at the Start

粒子法を用いて流体潤滑向けの数値シミュレータを開発を行う。従来の手法では難しかった、枯渇潤滑など気液界面の大変形が重要な寄与をもたらす問題をもシミュレーションの対象する手法である。
流体潤滑特有の狭い隙間と広い潤滑面を有する、つまり計算負荷が非常に大きい計算対象への適用を目指して大規模並列計算環境で実行可能な数値シミュレータを開発する。

Outline of Final Research Achievements

This research aimed to analyze hydrodynamic lubrication using the particle-based method, which is considered to be able to numerically analyze violent flow with large deformations of the gas-liquid interface. A method for calculating surface tension was proposed and a calculation code was developed to verify its action by comparison with theory and conventional experiments. Hydrodynamic lubrication analysis was carried out using the code, and it was confirmed that the results were the same as those obtained by conventional experimental and numerical analysis. Furthermore, we analyzed the case where the inlet side oil film was not full-filled with oil, which was difficult to analyze with conventional methods, and confirmed that the shape of the inlet oil film could affect the pressure profile. The flow field in the oil film, which is difficult to observe experimentally, was visualized.

Academic Significance and Societal Importance of the Research Achievements

本研究で開発をした粒子法に基づく流体潤滑解析のための計算手法は,従来の方法では難しかった入口側が油で満たされていない場合の解析を可能とした.これは撹拌抵抗の低減や省資源を意図して行われつつある貧潤滑条件下での運転にとって,重要な解析手段が得られたことを意味する.また新規に開発した表面張力の計算方法は,流体潤滑に限らず,液滴や濡れ,気泡の計算にも応用可能である.液滴の表面張力振動を対象にした計算モデルの検証方法は,粒子法に限らず,表面張力計算を行う全ての数値計算手法の検証の対象となりうる.

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (10 results)

All 2024 2023 2022 2021

All Journal Article (1 results) Presentation (8 results) (of which Int'l Joint Research: 2 results) Book (1 results)

  • [Journal Article] Hydrodynamic Lubrication Analysis by Particle-Based Method2021

    • Author(s)
      田中 健太郎、岩本 勝美
    • Journal Title

      JOURNAL OF JAPANESE SOCIETY OF TRIBOLOGISTS

      Volume: 66 Issue: 2 Pages: 98-103

    • DOI

      10.18914/tribologist.66.02_98

    • NAID

      130007986264

    • ISSN
      0915-1168, 2189-9967
    • Year and Date
      2021-02-15
    • Related Report
      2020 Research-status Report
  • [Presentation] 粒子法を用いた流体潤滑の数値計算 ~入口側油膜形状と流動形態~2024

    • Author(s)
      田中健太郎
    • Organizer
      トライボロジー会議
    • Related Report
      2023 Annual Research Report
  • [Presentation] マイクロ液滴の表面張力振動との比較による表面張力計算モデルの妥当性評価2022

    • Author(s)
      田中健太郎
    • Organizer
      IIP2022情報・知能・精密機器部門講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] Numerical Simulation of Hydrodynamic Lubrication by SPH method -Oil Film Profile at Inlet-2022

    • Author(s)
      Kentaro Tanaka, Toshikazu Fujino, Nicolas Fillot, Philippe Vergne and Katsumi Iwamoto
    • Organizer
      World Tribology Congress (WTC 2021)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] SPH simulation of surface tension oscillation of satellite droplet generated by capillary bridge breakup method2022

    • Author(s)
      Kentaro Tanaka
    • Organizer
      MIPE2022(2022 JSME-IIP/ASME-ISPS Joint International Conference on Micromechatronics for Information and Precision Equipment )
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] OpenFOAMを用いたマイクロ液滴の表面張力振動解析とその検証2022

    • Author(s)
      伊藤良,田中健太郎
    • Organizer
      第13回マイクロ・ナノ工学シンポジウム
    • Related Report
      2022 Research-status Report
  • [Presentation] マイクロ液滴の表面張力振動との比較による表面張力計算モデルの妥当性評価2022

    • Author(s)
      田中健太郎
    • Organizer
      IIP2021情報・知能・精密機器部門講演会講演論文
    • Related Report
      2021 Research-status Report
  • [Presentation] 粒子法を用いた流体潤滑の数値計算 ~解析結果の検証と重力の影響~2021

    • Author(s)
      田中健太郎
    • Organizer
      トライボロジー会議
    • Related Report
      2021 Research-status Report 2020 Research-status Report
  • [Presentation] 粒子法を用いた流体潤滑の数値計算 ~適用例と課題~2021

    • Author(s)
      田中健太郎
    • Organizer
      トライボロジー会議
    • Related Report
      2021 Research-status Report
  • [Book] 月刊トライボロジー 2023年6月号(発行予定)「解析技術特集」:粒子法を用いた数値解析 -液滴の表面張力振動と流体潤滑-2023

    • Author(s)
      田中健太郎
    • Total Pages
      3
    • Publisher
      新樹社
    • Related Report
      2022 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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