The Radial Flow of a Thin Liquid Film : 1st Report, Laminar-Turbulent Transition

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概要

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• This paper describes an experimental study of the laminar-turbulent transition in the radial flow of a thin liquid film on horizontal plane. The film flow was obtained by a water discharge from the thin cylindrical opening formed by a circular nozzle and a flat glass plate. The transition mechanism could be clearly observed in a visual observation using a stroboscope, since a turbulent motion in the thin layer of water disturbed the water surface. A sequence of experiments revealed the existence of a critical discharge Reynolds number Re_<t,cr>, based on the equivalent length of opening, above which the transition takes place. The relation between Re and the dimensionless radius r_t^* of the point of transition and the relation between r_t^* and the local Reynolds number Rer based on the film thickness at r_t are established.

• 一般社団法人日本機械学会の論文

著者

• Azuma Tsuneo

  Faculty Of Engineering Osaka City University

• HOSHINO Tatsuroh

  Osaka City University

関連論文

• The Radial Flow of a Thin Liquid Film : 3rd Report, Velocity Profile
• The Radial Flow of a Thin Liquid Film : 2nd Report, Liquid Film Thickness
• The Radial Flow of a Thin Liquid Film : 1st Report, Laminar-Turbulent Transition
• The Radial Flow of a Thin Liquid Film : 4th Report, Stability of Liquid Film and Wall Pressure Fluctuation
• The Radial Flow of a Thin Liquid Film : 5th Report, Influence of Wall Roughness on Laminar-turbulent Transition

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