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Structure preserving numerical methods for fluid dynamics

Research Project

Project/Area Number 17K05376
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Foundations of mathematics/Applied mathematics
Research InstitutionAomori University (2020)
Waseda University (2017-2019)

Principal Investigator

Suzuki Yukihito  青森大学, ソフトウェア情報学部, 教授 (90596975)

Co-Investigator(Kenkyū-buntansha) 大縄 将史  東京海洋大学, 学術研究院, 准教授 (10443243)
Project Period (FY) 2017-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Keywords構造保存型数値解法 / 非平衡熱力学 / 二相流れ / 応用数学 / シミュレーション工学
Outline of Final Research Achievements

Structure preserving numerical methods are developed for three-dimensional one and two-phase incompressible flows. Discretized gradient, curl, and divergence operators have same properties as the continuum case. Then the budgets of energy, helicity, and enstrophy are expressed in the same form as the continuum case. The energy and helicity are conserved and the enstrophy is generated by vortex stretching in inviscid flows, and those are dissipated due to the viscosity in viscid flows.

Academic Significance and Societal Importance of the Research Achievements

現在の数値流体力学(CFD)では計算の安定性を確保するために実際よりも多くエネルギーを散逸させるように調整されている(数値粘性)。また得られた数値解はNavier-Stokes方程式の近似解であることは保証されているが、それがNavier-Stokes方程式から理論的に導出される渦度方程式、運動エネルギー・ヘリシティ・エンストロフィーの保存則を満たす保証はない。一方、本研究で開発した構造保存型数値解法によれば、それら全ての方程式を離散化後も正確に満たすことが保証され、物理的に正しい数値解を常に得ることができる。

Report

(5 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (10 results)

All 2020 2019 2018 2017

All Journal Article (5 results) (of which Open Access: 1 results,  Peer Reviewed: 4 results) Presentation (5 results) (of which Int'l Joint Research: 4 results)

  • [Journal Article] On GENERIC formalisms for complex fluids (Mathematical Analysis in Fluid and Gas Dynamics)2020

    • Author(s)
      Yukihito Suzuki
    • Journal Title

      数理解析研究所講究録

      Volume: 2155 Pages: 180-191

    • Related Report
      2020 Annual Research Report
    • Open Access
  • [Journal Article] A GENERIC formalism for Korteweg-type fluids: I. A comparison with classical theory2020

    • Author(s)
      Suzuki Yukihito
    • Journal Title

      Fluid Dynamics Research

      Volume: 52 Issue: 1 Pages: 015516-015516

    • DOI

      10.1088/1873-7005/ab6f47

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] A GENERIC formalism for Korteweg-type fluids: II. Higher-order models and relation to microforces2020

    • Author(s)
      Suzuki Yukihito
    • Journal Title

      Fluid Dynamics Research

      Volume: 52 Issue: 2 Pages: 025510-025510

    • DOI

      10.1088/1873-7005/ab7ff6

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Bracket formulations and energy- and helicity-preserving numerical methods for incompressible two-phase flows2018

    • Author(s)
      Suzuki Yukihito
    • Journal Title

      Journal of Computational Physics

      Volume: 356 Pages: 64-97

    • DOI

      10.1016/j.jcp.2017.11.034

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Bracket formulations and energy- and helicity-preserving numerical methods for the three-dimensional vorticity equation2017

    • Author(s)
      Suzuki Yukihito
    • Journal Title

      Computer Methods in Applied Mechanics and Engineering

      Volume: 317 Pages: 174-225

    • DOI

      10.1016/j.cma.2016.12.012

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] A numerical method based on the Nambu bracket for the three-dimensional vorticity equation2020

    • Author(s)
      Yukihito Suzuki
    • Organizer
      南部力学がつなぐ時空トポロジーとミクロ・マクロ渦磁場構造形成
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] On GENERIC formalisms for complex fluids2019

    • Author(s)
      鈴木幸人
    • Organizer
      流体と気体の数学解析
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] A GENERIC formalism for complex fluids with Cattaneo heat flux2019

    • Author(s)
      Yukihito Suzuki
    • Organizer
      Waseda Workshop on Partial Differential Equations 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 流体力学における構造保存型数値解法について2018

    • Author(s)
      鈴木幸人
    • Organizer
      第14回 非線型の諸問題
    • Related Report
      2018 Research-status Report
  • [Presentation] A GENERIC formalism and the interstitial work flux for Korteweg-type fluids2017

    • Author(s)
      Yukihito Suzuki
    • Organizer
      International Workshop on the Multi-Phase Flow; Analysis, Modeling and Numerics
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research

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Published: 2017-04-28   Modified: 2022-01-27  

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