アスペクト比が小さいテイラー渦流れの数値解析（第１報，レイノルズ数の増加履歴によるモードの選択）

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タイトル別名
  • Numerical Analysis of the Taylor Vortex Flow with a Small Aspect Ratio (1st Report, Selection of the Final Mode Depended by a History of the Reynolds Number)
  • アスペクトヒ ガ チイサイ テイラーウズ ナガレ ノ スウチ カイセキ ダイ1ポウ レイノルズスウ ノ ゾウカ リレキ ニ ヨル モード ノ センタク
  • 1st Report, Selection of the Final Mode Depended by a History of the Reynolds Number
  • 第1報, レイノルズ数の増加履歴によるモードの選択

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In this report we present the results of the 3-dimensional numerical analysis for the selection of the final modes on the Taylor vortex flow with a small aspect ratio. Some kinds of modes of the Taylor vortex flow are depended by a history of the increment of the Reynolds number even though the final Reynolds number and the aspect ratio were same value. In this numerical computation, 6 kinds of final Reynolds numbers and 6 kinds of accelerations of the Reynolds number were used at an aspect ratio 4.0 on the symmetric system. The mode formation processes in the numerical analysis were qualitatively consistent with the results in the experiment. And the final modes on the 36 sets of the histories of the increment of the Reynolds number were 75% accuracy consistent with the final modes in the equivalent experiment. The time development of the energy and the enstrophy in radial, axial and azimuthal directions of the Couette-Taylor flow were investigated. The energy and the enstrophy in the radial direction affected to the final mode.

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