کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
7061415 1459032 2014 11 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Investigation of the inhomogeneous shear flow of a wormlike micellar solution using a thermodynamically consistent model
ترجمه فارسی عنوان
بررسی جریان برشی غیرمجاز یک راه حل میکرفر کرمی با استفاده از یک مدل ترمودینامیکی سازگار
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موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی
By using the generalized bracket approach of nonequilibrium thermodynamics, we recently developed a new two-species model for wormlike micelles based on the flow-induced breakage of the longer species. In this work, we complete the model by adding diffusion in a thermodynamically consistent manner. Furthermore, we discuss the behavior of a limiting case of the model in transient Couette flow between two coaxial cylinders, which is a flow that exhibits spatial inhomogeneities and has widely been studied for wormlike micellar solutions. The flow problem was spatially discretized using a Chebyshev method. A Crank-Nicolson scheme was employed for time discretization. At each time step, the nonlinear system of discretized flow equations was solved using a preconditioned Newton-Krylov solver. The model parameters were obtained by fitting experimental data of a previously studied wormlike micellar system. We found that the model can capture the trends observed in steady simple shear, small-amplitude oscillatory shear, and step strain. The main feature of the model is a strong elastic recoil during the start-up of simple shear flow.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Newtonian Fluid Mechanics - Volume 207, May 2014, Pages 21-31
نویسندگان
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