キャビテーションと乱流要素渦の相互作用 Interaction between Cavitation and Elementary Vortex in Turbulence

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We focus our attention on the low pressure area in turbulent fine vortices, which is Burgers vortex type and closely related to cavitation inception, because it has been ignored in previous methods for cavitating flow simulation. As a basis of model construction, the interaction between a Burgers vortex and cavitation is investigated by the direct numerical simulation (DNS). The vortex is artificially reproduced to represent a fine-scale elementary motion in fully developed turbulence. The results show that both the circumferential velocity and the streamwise vorticity distributions shift due to the sudden expansion by cavitation inception. Assuming the circulation is kept constant, we derive a new model which represents velocity modulation of an elementary vortex for the case of cavitation. Our model successfully explains the DNS results. This simple model can become the basic concept of cavitating turbulence model.

収録刊行物

  • 混相流研究の進展 : 年会講演会論文精選集 = Progress in multiphase flow research  

    混相流研究の進展 : 年会講演会論文精選集 = Progress in multiphase flow research (2008), 1-8, 2008-06-15 

    THE JAPANESE SOCIETY FOR MULTIPHASE FLOW

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各種コード

  • NII論文ID(NAID)
    10021154267
  • NII書誌ID(NCID)
    AA12204080
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    18815804
  • NDL 記事登録ID
    9553704
  • NDL 雑誌分類
    ZM17(科学技術--科学技術一般--力学・応用力学)
  • NDL 請求記号
    Z74-E929
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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