黏性不可压流体的自适应网格技术和基本特性方程分离算法的联合分析

S·图赖维瓦塔纳; P·布恩马勒特; P·瑟雷克; S·封查那帕尼; P·德乔姆凡

黏性不可压流体的自适应网格技术和基本特性方程分离算法的联合分析

国立朱拉隆功大学工程学院机械工程系,曼谷 10330,泰国;2.北曼谷先皇科技大学工业技术学院机械工程系,曼谷 10800,泰国

基金项目: 泰国国家基金资助项目

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出版历程
- 收稿日期: 2006-05-08
- 修回日期: 2007-05-08
- 刊出日期: 2007-09-15

Combined Adaptive Meshing Technique and Characteristic Based Split Algorithm for Viscous Incompressible Flow Analysis

Department of Mechanical Engineering, Faculty of Engineering, Chulalongkorn University, Patumwan, Bangkok 10330, Thailand;

摘要

摘要: 组合基本特性方程分离算法和自适应网格技术，分析二维黏性不可压流体．该方法使用3节点三角单元，对速度分量和压力等变量分析，使用等阶次的插值函数．组合解法的主要优点在于，在自适应网格技术中，对解梯度变化大的区域，通过耦合误差估计生成小的单元,利于提高解的精度,在其它区域生成大单元，可以节省时间．最后，通过对一个黏性流体圆柱体绕流问题的瞬态和稳态特性分析,给出了组合解法性能的评价．
- 自适应网格 /
- 分离基本特性方程 /
- 有限元法 /
- 不可压流体
Abstract: A combined chara cteristic-based splitalgorithm and anada ptive meshing technique foranalyzing two-dimensional viscous incompressible flow is presented. The method uses the three-node triangular element with equal-order interpolation functions forall variables of the velocity components and pressure. The main a dvantage of the combined method is toimprove solution a ccuracy by coupling an error estimation procedure to anada ptivemeshing technique that generates small elements in regions with largechange in solution gradients, and at the same time, larger elements in other regions. The performance of the combined procedure is evaluated by analyzing the three testcases of the flow past a cylinder, for their transient and steady-state flow behaviors.
- adaptive mesh /
- caharcteristic-based split /
- finite element method /
- incompr essible flow

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参考文献(16)

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