0308 界面活性剤水溶液の衝突噴流(OS3-2 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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The normal heat transfer characteristics are maintained in the impinging jet when the counter ion is excessively added to the surfactant solutions. On the other hand, the drag reduction can be attained in a pipe. In order to clarify the phenomena, the impinging jet was visualized. The surfactant used was Ethoquad O/12. The counter ion was salicylic sodium, and was added with an equal and 30 times higher molar concentrations than the surfactant. The two surfactant solutions indicated different boundary layer flows in the wall jet region. The surfactant solution with the molar ratio of 30 showed the same boundary layer thickness as water. On the other hand, the equi-molar counter ion inhibitted to induce the boundary layer flow on the wall at the low Reynolds number.
社団法人日本機械学会の論文
2009-11-06