Non-Newtonian fluid flows through backward-facing steps

被引：0
作者：
Houari Ameur
Younes Menni
机构：
[1] University Centre of Naama (Ctr Univ Naama),Department of Technology
[2] Abou Bekr Belkaid University,Unite of Research on Materials and Renewable Energies – URMER, Department of Physics
来源：
SN Applied Sciences | 2019年 / 1卷
关键词：
Turbulent flow; Simulations; Backward-facing step; Non-Newtonian fluid;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The flows of complex fluids through a backward-facing step are discussed in this paper. The investigation is carried out by means of numerical simulation and using the calculation code Ansys CFX 18.0. The simulated fluids are incompressible and have a non-Newtonian (shear-thinning) behavior modeled by the Oswald’s law. The basis of the numerical approach used is the finite volume method. In order to ensure an adequate prediction of the nature of the downstream flows, some results are compared with the experimental measurements and a good agreement is obtained. The study is performed for different geometrical configurations, and for a range of Reynolds number covering the laminar, transitional and turbulent flow regimes, Re is varying from 100 to 12,000. The long-term goals for this study are to explore and actively control the wake dynamics of shear-thinning fluids behind the step which will be useful to determine the wake characteristics behind different types of bodies.
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