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

• 作者: Aboubaker Chedikh Beye Barka Mahamat Ngargoto Ngarmoundou Rilengar Godfroyd Ousman
• 来源期刊: 流体动力学(英文)
• 学科: 数学
• 关键词: RHEOLOGY Behavior Polyethylene Oxide COUETTE GEOMETRY Viscosity Speed Profiles SHEAR Stress SHEAR BANDS SHEAR Rate Localization Rheo-Fluidifying THRESHOLD
• 年，卷（期）: ltdlxyw_2017,（4）
• 页码范围: 673-695
• 页数: 23页
• 分类号: O1

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.