非ニュートン流体の曲り管内流れ : 第3報,乱流管摩擦係数
1987 年 53 巻 487 号 p. 850-857
詳細
1987 年 53 巻 487 号 p. 850-857
Turbulent friction coefficients are measured for fully-developed flows in curved pipes with a circular and square cross section using non-Newtonian liquids (aqueous solutions of CMC and PAA). Effects of power-index, Reynolds number and curvature radius ratio are made clear. The turbulent friction coefficient for non-Newtonian liquids is lower than that for Newtonian liquids, and becomes larger as the curvature is stronger. Also, the turbulent friction coefficients fall on a single line in terms of Re(d/Rc)2 for circular pipes and Re(d/Rc)2 for square ones. The transition Reynolds number increases as the curvature is stronger.
