On the Drag of a Sphere In Polymer Solutions

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概要

• 論文の詳細を見る

• The relationship between the coefficient of drag and the Reynolds number on a sphere in the polymer solutions was studied experimentally through on the measurement of terminal velocity and the observation of flow about a falling sphere. And then, the effectiveness of Stokes's law and Perry's curve for the concentrated polymer solutions (CMC & PED) in the range of low Reynolds numbers (less than 10^3) was examined using R_e* instead of R_e and the drag reduction of very dilute polymer solutions (PEO) in the range of high Reynolds numbers (more than 5×10^3) was confirmed. Besides, it was shown that such a drag reduction was characterized by two dimensionless numbers, Reynolds number (R_e) and Weissenberg number (R_n*: Reiner-Rivlin model or N_e*: Combination model).

• 一般社団法人日本機械学会の論文

著者

• KATO Hiroshi

  Faculty of Science, Kwansei Gakuin University

• Tachibana Motoyoshi

  Faculty Of Engineering Fukui University

• OIKAWA Kenjiro

  Toray Industries Inc.

• Kato Hiroshi

  Faculty Of Engineering Tokyo Metropolitan University

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