کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
671160 1459084 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A comparison of four implementations of the log-conformation formulation for viscoelastic fluid flows
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
A comparison of four implementations of the log-conformation formulation for viscoelastic fluid flows
چکیده انگلیسی

We compare four finite element implementations of a log-conformation formulation for the numerical solution of viscoelastic fluid flow problems. These formulations essentially differ the treatment of the advective term. The first formulation was introduced in Fattal and Kupferman (2005) [1] while the second one, much simpler to implement, was proposed by Coronado et al. (2007) [2]. We then introduce the two variants of this last formulation. In the first one, a special treatment is done to the computation of the advective term u⋅∇es which is more accurate than the one described in Coronado et al. (2007) [2]. In the second variant, we show how es and ∇es can be computed in order to allow a complete linearization of the constitutive equation and its solution by Newton’s method. A comparative study of these four formulations is done on the benchmark problem of the flow of an Oldroyd-B fluid past a circular cylinder in a rectangular channel.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Newtonian Fluid Mechanics - Volume 164, Issues 1–3, December 2009, Pages 45–50
نویسندگان
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