放射状自由液膜流れの乱流遷移に関する研究 : 第3報, 乱流遷移が生じる場合の速度分布

概要

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The laminar-turbulent transition in the radial flow of a free liquid film is studied. The liquid film flow is generated in the same way as in the previous papers. When the Reynolds number which is based on the liquid surface velocity and the film thickness at the disk edge is high, the transition from laminar to turbulent flow takes place several millimeters downstream of the disk edge. The change of the velocity distribution in the process of the transition is examined by LDV. It is found that the reduction of the radial velocity component due to the occurrence of very small vortices starts at the higher velocity side of the liquid film a few millimeters downstream of the disk edge, and thereafter the velocity distribution becomes uniform immediately.
一般社団法人日本機械学会の論文
1988-02-25