期刊
PHYSICAL REVIEW FLUIDS
卷 1, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevFluids.1.041301
关键词
-
资金
- Engineering and Physical Sciences Research Council [EP/M025187/1]
- EPSRC [EP/M025187/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/M025187/1] Funding Source: researchfish
We report the results of an experimental study of the fully developed flow of a viscoelastic, shear-thinning aqueous polymer solution through two large-scale parallel shear flows: a pipe and channel-flow facility. We show that, at low flow rates, the velocity profile in both geometries is steady and is in good agreement with expected analytical solutions. However, in both geometries at higher flow rates the flow becomes weakly time dependent and the mean velocity profile is radically altered, exhibiting an overshoot near the duct center, a reduced shear rate at the wall, and an inflection point (i.e., a nonmonotonic gradient). Although inertia is not completely negligible at instability onset, we speculate that the origin of these unstable flows lies in the combination of elasticity and strong shear thinning.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据