کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
655013 | 1457622 | 2016 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A mesh-free lattice Boltzmann solver for flows in complex geometries
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Simulation of geometrically complicated flows in which mesh generators have severe mesh quality-related difficulties or even fail to create a mesh is one of the open problems in computational fluid dynamics. In this study, we have proposed a mesh-free lattice Boltzmann method for the solution of geometrically complex fluid flow problems. The main distinction of our method is to consider the streaming equation as a pure advection equation rather than a perfect shift, so that the physical space discretization becomes independent of the lattice. We discretize the advection equation using the Lax-Wendroff scheme in time and the meshless local Petrov-Galerkin scheme based on radial basis functions in space. We first solve two benchmark problems, namely the Poiseuille flow and the lid-driven cavity flow for the validation of the proposed method, and then simulate fluid flow in a two dimensional granular porous medium. The results show that our method outperforms the conventional lattice Boltzmann method in the simulation of geometrically complicated flows.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Fluid Flow - Volume 59, June 2016, Pages 10-19
Journal: International Journal of Heat and Fluid Flow - Volume 59, June 2016, Pages 10-19
نویسندگان
S. Hossein Musavi, Mahmud Ashrafizaadeh,