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Study of Normal Forces Generated in the Flow between Two Rolls Rotating at Relatively Different Speeds.

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  • 相対的に回転する2ロール間の流体により生じる力に関する研究
  • ソウタイテキ ニ カイテンスル 2 ロールカン ノ リュウタイ ニ ヨリ ショ

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Abstract

Normal forces generated in the flow between two-rolls, one rotating and the other fixed, are measured. Water and glycerin-water solutions are used in the experiments and the forces measured under the usual experimental condition are in good agreement with one-dimensional theoretical predictions obtained by Cameron using the Reynolds equation and the half Sommerfeld condition. A thin liquid film is produced on the surface of the rotating roll under the usual experimental conditions. But when the liquid film is stripped off with a spatula, the measured normal force is reduced. In the case of a small quantity of supplying fluids and the low speeds of rotating, the measured normal force is negative for water but positive for glycerin-water solutions.

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