Effect of non-newtonian viscosity for surfactant solutions on vortex characteristics in a swirling pipe flow

被引：0
作者：
Mizue Munekata
Hidefumi Takaki
Hideki Ohba
Kazuyoshi Matsuzaki
机构：
[1] Kumamoto University,
[2] Tokyo Electron LTD.,undefined
来源：
Journal of Thermal Science | 2005年 / 14卷
关键词：
swirling flow; drag reduction; surfactant solution; non-Newtonian fluid; vortex; LDV; O357.5;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Effects of non-Newtonian viscosity for surfactant solution on the vortex characteristics and drag-reducing rate in a swirling pipe flow are investigated by pressure drop measurements, velocity profile measurements and viscosity measurements. Non-Newtonian viscosity is represented by power-law model (τ=kDn). Surfactant solution used has shear-thinning viscosity with n<1.0. The swirling flow in this study has decay of swirl and vortex-type change from Rankin’s combined vortex to forced vortex. It is shown that the effect of shear-thinning viscosity on the decay of swirl intensity is different by vortex category and the critical swirl number with the vortex-type change depends on shear-thinning viscosity.
引用
收藏
页码：357 / 361
页数：4
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