高精度マルチブロック流体計算のための一般化特性インターフェイス条件の構築とその性能評価 Construction of Generalized Characteristic Interface Conditions for High-Order Multi-Block Fluid Computation and Its Performance Evaluation

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In practical fluid computation with structured grids around complex geometries, singular points can be frequently found where abrupt grid line changes exist. The grid singularities cause troublesome problems when some finite difference scheme with high accuracy and resolution is applied. Excellent theory has been proposed, which solve the above singular problem by decomposing a computational domain into two blocks along a line or a surface which contains the singular points and by imposing the characteristic interface conditions (CIC) at the block interface. However, the original theory has constraints on a combination between the adjacent computational coordinate definitions; these two coordinates have to be the same direction on the block interface. For a flexible coordinate arrangement without the restriction, the original CIC is further extended, and the generalized characteristic interface conditions (GCIC) are newly derived. Consequently, the coincidence of the computational coordinate definitions becomes unnecessary, and more flexible multi-block computation can be realized successfully. In this paper, vortex convection problems with grid singularities are solved to validate the GCIC. Besides, conventional multi-block treatment with overlapped domain technique and that with averaging procedure are also tested and compared to investigate their superiorities and inferiorities. As a result, it is confirmed that the GCIC have excellent performance in the multi-block computation and can be straightforwardly applied to a detailed unsteady flow simulation such as direct computation of aero-acoustics.

収録刊行物

  • 日本航空宇宙学会論文集 = Journal of the Japan Society for Aeronautical and Space Sciences  

    日本航空宇宙学会論文集 = Journal of the Japan Society for Aeronautical and Space Sciences 54(635), 563-575, 2006-12-05 

    一般社団法人 日本航空宇宙学会

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各種コード

  • NII論文ID(NAID)
    10018580542
  • NII書誌ID(NCID)
    AA11307372
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    13446460
  • NDL 記事登録ID
    8619784
  • NDL 雑誌分類
    ZN25(科学技術--運輸工学--航空機・ロケット)
  • NDL 請求記号
    Z74-B503
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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