Flow Bifurcations of Shear-Thinning Fluids in a Channel with Sudden Contraction and Expansion

被引：2
|
作者：
Patlazhan, S. A. [1 ]
Roshchin, D. E. [2 ,3 ]
Kravchenko, I. V. [2 ]
Berlin, A. A. [1 ]
机构：
[1] Russian Acad Sci, Semenov Fed Res Centerfor Chem Phys, Moscow 119991, Russia
[2] Russian Acad Sci, Inst Problems Chem Phys, Chernogolovka 142432, Moscow Oblast, Russia
[3] Natl Res Univ, Moscow Inst Phys & Technol, Dolgoprudnyi 141701, Moscow Oblast, Russia
来源：
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B | 2019年 / 13卷 / 05期
基金：
俄罗斯基础研究基金会;
关键词：
variable cross-section channel; shear-thinning fluids; flow bifurcation;
D O I：
10.1134/S1990793119050063
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
The flow bifurcation transitions of shear-thinning fluids in a channel with sudden contraction and expansion are studied by means of numerical modeling. The rheological properties of the non-Newtonian fluids under consideration are described with the Carreau-Yasuda model. Flow-bifurcation diagrams for media with different viscosity curves are calculated. It is shown that the values of the critical Reynolds number in the bifurcation point and length of the formed corner vortices substantially depend on the slope of the viscosity curve.
引用
收藏
页码：842 / 848
页数：7
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