Influence of Polymer Additives on Transitional Plane Poiseuille Flow
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概要
- 論文の詳細を見る
Transition in dilute polymer solutions was investigated in the same manner as outlined in the previous report for Newtonian fluids. First, we investigated the natural transition arising from a minimum critical Reynolds number. The results suggested that the structural alteration of a turbulent spot resulted in polymer drag reduction. Next, we maintained laminar flow above the minimum critical Reynolds number and visualized the growth of spots artificially created in the laminar flow. The results showed that polymer additives reduce the spreading angle of a spot. Striped streak patterns of ink were observed around the spots. This phenomenon is supposedly caused by the instability of polymer solutions and instability in the background flow.
- 一般社団法人日本機械学会の論文
- 1988-05-15
著者
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KATO Hiroshi
Faculty of Science, Kwansei Gakuin University
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Mizunuma Hiroshi
Faculty Of Engineering Tokyo Metropolitan University
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