2323 旋回流における界面活性剤水溶液の流動特性とレオロジー特性の関連性に関する研究(S42-5 複雑流体の流動現象(5),S42 複雑流体の流動現象)  [in Japanese] 2323 A Study on Relationship between Swirling Flow Characteristics and Rheologic Characteristics of Surfactant Solution  [in Japanese]

The purpose of this study is to investigate the effect of rheologic characteristics of surfactant solution on the swirling flow characteristics. The drag-reducing rate in a swirling pipe flow was estimated by the pressure drop and the velocity profiles were measured by LDV. The non-Newtonian viscosity and the relaxation time were measured by a rotation viscometer. It is shown that the drag-reducing rate depends on the relaxation time strongly, compared with the rheologic parameters by a power law. The effect of apparent viscosity on the swirl intensity and the stronger effects of relaxation time on the decay of swirl intensity are shown also and discussed.