کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7061415 | 1459032 | 2014 | 11 صفحه PDF | 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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کلمات کلیدی
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
Journal: Journal of Non-Newtonian Fluid Mechanics - Volume 207, May 2014, Pages 21-31
نویسندگان
N. Germann, L.P. Cook, A.N. Beris,