کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7157489 1462724 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Numerical simulation of the dispersion of aggregated Brownian particles under shear flows
ترجمه فارسی عنوان
شبیه سازی عددی پراکندگی ذرات جمع شده ی براونی در جریان های برشی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
چکیده انگلیسی
The deformation and breakup processes of a particle-cluster aggregate under shear flows are numerically investigated by the two-phase lattice Boltzmann method. The van der Waals attraction is considered to be the force between particles. Simulations are performed for various fluid forces acting on particles and various inter-particle forces. It is found that the ratio of the fluid force to the maximum inter-particle force, Y, is a key factor in dispersion, and the aggregate of non-Brownian particles is dispersed when Y is over 0.001. The Péclet number, which is the ratio of the diffusion rate due to shear flow to that due to the Brownian motion, is also considered. By comparing the calculated result of the dispersion of Brownian particles with that of non-Brownian particles, it is found that the Brownian motion impedes dispersion and the effect of the Brownian motion is remarkable when the Péclet number is under 105.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers & Fluids - Volume 86, 5 November 2013, Pages 395-404
نویسندگان
, , ,