流固移动边界网格剖分和更新的改进弹簧近似法  

The Improved Spring Analogy of Mesh Generation and Update on the Moving Boundary of Fluid-Solid Interface

作　　者：邓麟勇[1] 周岱[1] 赵尧军[1] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《上海交通大学学报》2009年第6期994-998,1004,共6页Journal of Shanghai Jiaotong University

基　　金：上海市基础研究重点项目(07JC14023);高等学校博士学科点专项科研基金项目(200802480056);国家自然科学基金资助项目(50778111)

摘　　要：在分析顶点弹簧近似法基础上,改进标准弹簧近似法,推导出修正弹簧刚度,以提高其对大扭曲变形的适应能力.通过NACA0012翼型非结构化网格流场算例检验在大变形下,改进弹簧近似法生成网格的质量.通过映射方法,把改进弹簧近似法用于结构化网格,提高网格更新质量.引入网格单元的长宽比和倾斜度等2个参数以定量分析网格质量.分析表明,改进弹簧近似法亦可有效地运用于结构化网格.通过二维圆柱绕流算例验证了用本文方法在网格更新方面的正确性.The mesh generation and update on the moving boundary of fluid-solid interface were investigated by spring analogy approach. An improved spring analogy approach was developed with the derivation of the modified spring stiffness. The mesh quality generated by the improved approach was checked under the large distortion of mesh system, through the simulation of NACA0012 airfoil flow based on unstructured grid technique. Furthermore, the improved approach was extended to structured grid system by the mapping technique, and some parameters such as the radio of length to width and grid gradient were introduced to analyze the quality of mesh system. The study shows that the present approach is adaptable to the generation and update of structured grid. Finally, a numerical example of flow around two-dimensional cylinder was introduced to test the validity of the improved spring analogy approach.

关 键 词：弹簧近似法 非结构化网格 结构化网格 网格更新 

分 类 号：TU312.1[建筑科学—结构工程]