401 シンプレクティック時間積分法の数値流体解析への応用

• 田中 伸厚

  茨大工

• 北山 努

  茨大工

• 清水 武司

  (株)東芝

書誌事項

タイトル別名

• Application of symplectic time integrators to CFD

抄録

The symplectic semi-Lagrangian (SSL) method was developed in order to improve the preservation of physical quantities of semi-Lagrangian method. In the method, symplectic integrators are adopted in searching for the upstream point in the semi-Lagrangian method. The purpose of this paper is to verify the validity of symplectic Semi-Lagrangian method for a practical fluid problem, that is two-dimensional incompressible viscous flow. We compare here two kinds of implicit symplectic integrators; second-order gauss method and second-order trapezoidal rule method. The computed results show that the SSL can take such large time-step size over Courant number 1 without loosing computational accuracy. It also turns out that second-order gauss method is more accurate than the trapezoidal rule method.

収録刊行物

• 茨城講演会講演論文集

  茨城講演会講演論文集 2002 (0), 81-82, 2002

  一般社団法人 日本機械学会

キーワード

• CFD
• Symplectic time integration
• Semi-Lagrangian method
• Gauss method Incompressible viscous flow
• Trapezoidal rule method

詳細情報

• CRID: 1390282680831009152
• NII論文ID: 110002511842
• DOI: 10.1299/jsmeibaraki.2002.81
• ISSN: 24242683
• Web Site: https://www.jstage.jst.go.jp/article/jsmeibaraki/2002/0/2002_81/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可