کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7061065 1458982 2018 18 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Axisymmetric viscoplastic dambreaks and the slump test
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Axisymmetric viscoplastic dambreaks and the slump test
چکیده انگلیسی
We report computations of the axisymmetric slump of viscoplastic fluid using the volume-of-fluid (VOF) method. The constitutive law is dealt with by either regularization or the augmented-Lagrangian method. The interface is tracked by the PLIC scheme, modified in order to avoid resolution issues associated with the over-ridden finger of ambient fluid that results from the no slip condition and the resulting inability to move the contact line. Numerical results are compared with asymptotic analyses for shallow gravity currents or slender vertical columns. The critical yield stress for failure is computed and bounded analytically using plasticity methods. The simulations are compared with experiments either taken from existing literature or performed using Carbopol. The comparison is satisfying for lower yield stresses; discrepancies for larger yield stresses suggest that the mechanism of release may affect the experiments.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Newtonian Fluid Mechanics - Volume 258, August 2018, Pages 45-57
نویسندگان
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