| 用Lattice Boltzmann方法计算流体对曲线边界的作用力 |
| |
| 引用本文： | 施卫平,祖迎庆.用Lattice Boltzmann方法计算流体对曲线边界的作用力[J].吉林大学学报(理学版),2005,43(2):132-136. |
| |
| 作者姓名： | 施卫平 祖迎庆 |
| |
| 作者单位： | 吉林大学数学学院力学与工程科学系， 长春 130012 |
| |
| 基金项目： | 国家重大基础研究前期研究专项基金(批准号:2002CCA01200)，吉林大学创新基金和教育部留学回国人员科研启动基金(批准号:2002247). |
| |
| 摘 要： | 通过分析格子Boltzmann方法中边界受力的计算方法,
研究了两种用LB方法计算边界受力的方法——动量转换法和应力积分法, 其中动量转换法较为可靠、 准确, 且易于执行. 应用LB方法模拟了圆柱绕流问题, 并计算出圆柱的阻力系数. 通过模拟凹坑表面的层流流动, 发现随着Re数的增大, 凹坑表面的阻力系数逐渐接近平
板的阻力系数.
|
| 关 键 词： | LatticeBoltzmann方法 动量转换法 应力积分法 阻力系数 |
| 文章编号： | 1671-5489(2005)02-0132-05 |
| 收稿时间： | 2004-08-18 |
| 修稿时间： | 2004年8月18日 |
Evaluation of Fluid Acting Force on the Curve Boundary in the Lattice Boltzmann Method |
| |
| SHI Wei-ping,ZU Ying-qing.Evaluation of Fluid Acting Force on the Curve Boundary in the Lattice Boltzmann Method[J].Journal of Jilin University: Sci Ed,2005,43(2):132-136. |
| |
| Authors: | SHI Wei-ping ZU Ying-qing |
| |
| Institution: | Department of Mechanics and Technology Science, College of Mathematics, Jilin University, Changchun 130012, China |
| |
| Abstract: | Two approaches, the momentum-exchange method and the stress-integration method, for force evaluation based on the Lattice Boltzmann equation were investigated. The momentum-exchange method is relatively reliable, accurate, and easy to implement for both two-dimensional and three-dimensional flows. The flow around a cylinder was simulated, and the drag coefficient of the cylinder was evaluated by the momentum-exchange method. The drag coefficient of a concave surface was also evaluated and compared with the theoretical drag coefficient of a plane. The numerical results are valid, and the drag coefficient of the concave surface is close to that of the plan with the increase of Re number. |
| |
| Keywords: | Lattice Boltzmann method momentum-exchange method stress-integration method drag coefficient |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《吉林大学学报(理学版)》浏览原始摘要信息 |
| 点击此处可从《吉林大学学报(理学版)》下载免费的PDF全文 |
