| LBM的一种新的边界处理方法 |
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| 引用本文： | 杨佳庆,卢德唐,李道伦. LBM的一种新的边界处理方法[J]. 水动力学研究与进展(A辑), 2009, 24(3) |
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| 作者姓名： | 杨佳庆 卢德唐 李道伦 |
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| 作者单位： | 1. 中国科学技术大学近代力学系,合肥,230027
2. 中国科学技术大学安徽省计算与通讯软件重点实验室,合肥,230026 |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展规划(973计划) |
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| 摘 要： | 近年来,LBM取得了长足的进展,理论和应用方面都有了新的突破,各种新的模型和边界处理方法不断被提出.在这些边界处理方法基础上,本文提出了一种新的边界处理方法,该方法是用邻点和次邻点的宏观值二阶插值得到边界上的宏观值,再用邻点的分布函数的非平衡部分来外推得到边界处的分布函数.此方法可用于压力边界或速度边界,具有二阶精度,采用该处理方法对Poiseuille流、Couette流和Cavity流进行了数值模拟,并与其他几种边界处理作了比较,其结果要好于其他几种边界处理.
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| 关 键 词： | 边界条件 数值模拟 |
A new method for boundary condition in Lattice Boltzmann Method |
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| YANG Jia-qing,LU De-tang,LI Dao-lun. A new method for boundary condition in Lattice Boltzmann Method[J]. Chinese Journal of Hydrodynamics, 2009, 24(3) |
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| Authors: | YANG Jia-qing LU De-tang LI Dao-lun |
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| Affiliation: | 1. Department of Modern Mechanics;University of Science and Technology of China;Hefei 230027;China;2. Key Laboratory of Software in Computing and Communication of Anhui Province;China |
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| Abstract: | In recent years, great progresses have been obtained in LBM and there are some breakthroughs in the theory and application. Various new models and methods for boundary conditions treatment were proposed. Based on using the macro-variable of the nearest neighboring fluid node and the secondly nearest fluid node to extrapolate the boundary node with the second-order, and approximating the distribution function of the boundary node with the non-equilibrium part of the distribution function at neighboring fluid... |
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| Keywords: | LBM |
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