0306 ポリマー一様溶液の抵抗低減効果とポリマー会合体の分子量の影響(OS3-1 流れの抵抗低減,オーガナイズドセッション)

概要

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Detailed investigation on the drag reduction of water soluble polymer was performed. The drag reducing effect of water soluble polymer solution was measured precisely by a specially designed pipe flow system (1-pass device) and the mean molecular weight in solvent was detected by GPC-MALS. We investigated for 28 kinds of water soluble polymer solution in this study. The polymer solution prepared 10 ppm weight concentration in pure water, and the Reynolds number was ranging from 8000 to 22000 in the 1-pass device. It was found that the polymer with higher molecular weight (more than 1 million) increases obviously the maximum drag reduction. However, when the polymer molecular weight is more than 3 million, the maximum drag reduction tends to a constant value. Moreover, these experimental results have good coincidence with DNS results.
社団法人日本機械学会の論文
2009-11-06