Flow Curves in the Centered Cylindrical Couette Geometry of a Polyethylene Oxide Solution  

作　　者：Ngargoto Ngarmoundou Rilengar Godfroyd Ousman Barka Mahamat Aboubaker Chedikh Beye 

机构地区：[1]Group of Laboratories of Physics of Solids and Materials Science (GPSSM), Department of Physics, Faculty of Sciences and Techniques, Cheikh Anta Diop University, Dakar, Senegal [2]Department of Mechanic, Faculty of Sciences and Techniques, University of Mongo, Mongo, Chad [3]Department of Physical Science, Faculty of Exact and Applied Sciences, University of N’Djamena, N’Djamena, Chad

出　　处：《Open Journal of Fluid Dynamics》2017年第4期673-695,共23页流体动力学（英文）

摘　　要：Polyethylene oxide solutions have a behavioral flexibility that provides researchers with the opportunity to use constitutive law models in a variety of ways for their MRI characterization. Our results obtained in numerical simulation carried out in 2D and 3D for speed profiles of a solution of PEO deployed by the simple method of the cylindrical Couette geometry considering the fluid Newtonian defect, allowed to identify the behavior of fluid complex (rheo-fluidifying threshold fluid). The relevance and the interest of the method are examined by analyzing these results generated by the numerical data obtained, since these profiles depend on the non-Newtonian properties of the fluid which one does not know a priori and which one seeks to measure by postulating first to the power law of Ostwald, then to the truncated power law.Polyethylene oxide solutions have a behavioral flexibility that provides researchers with the opportunity to use constitutive law models in a variety of ways for their MRI characterization. Our results obtained in numerical simulation carried out in 2D and 3D for speed profiles of a solution of PEO deployed by the simple method of the cylindrical Couette geometry considering the fluid Newtonian defect, allowed to identify the behavior of fluid complex (rheo-fluidifying threshold fluid). The relevance and the interest of the method are examined by analyzing these results generated by the numerical data obtained, since these profiles depend on the non-Newtonian properties of the fluid which one does not know a priori and which one seeks to measure by postulating first to the power law of Ostwald, then to the truncated power law.

关 键 词：RHEOLOGY Behavior POLYETHYLENE Oxide COUETTE GEOMETRY Viscosity Speed Profiles SHEAR Stress SHEAR BANDS SHEAR Rate Localization Rheo-Fluidifying Threshold 

分 类 号：O1[理学—数学]