STUDY ON THE TURBULENT STRUCTURES IN CAVITY OPEN-CHANNEL FLOWS

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  • 開水路キャビティー流れの乱流構造に関する研究
  • カイスイロ キャビティー ナガレ ノ ランリュウ コウゾウ ニ カンスル ケンキュウ

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This paper describes turbulent structures in cavity open-channel flows. Turbulence measurements were conducted by making use of a two-component fiber-optic Laser Doppler Anemopmeter (LDA), where the Froude number, the Reynolds number and the aspect ratio of cavity shear layer changed. Next, Large Eddy Simulation (LES) and flow visualization by Particle Image Velocimetry (PIV) were carried out for two cases of experiments of which turbulent structures shows the characteristic behaviors. As the result, the effects of changes of Froude number, Reynolds number and the aspect ratio of the cavity shear layer, also the relationship of coherent structures were revealed and discussed.

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