A hybrid adaptive gridding procedure for recirculating fluid flow problems
A hybrid adaptive gridding procedure for recirculating fluid flow problems
复制标题
用于再循环流体流动问题的混合自适应网格化程序
DOI：
10.1006/jcph.1993.1168
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发表时间：
1993
影响因子：
4.1
通讯作者：
Y. Tsuei
中科院分区：
文献类型：
--
作者：
Denz Lee;Y. Tsuei
针对非定常回流问题，提出了一种结合局部网格加密和整体网格移动的混合自适应网格生成方法。该过程从全局网格移动方法开始，该方法提供了初始自适应解。基于该初始解，标记大误差区域，然后对大误差区域应用局部细化。讨论了误差估计和接口处理方法。在一维对流扩散方程，驱动极腔流，和层流后向台阶流的过程进行评估。各种方法的效果进行了评估。具体而言，在测试问题中，混合自适应网格解决方案需要不到十分之一的CPU时间的均匀细网格解决方案，以达到相同的精度。该方法可方便地推广到三维不规则几何流动问题。参考文献36篇，图17，4个标签。
A hybrid adaptive gridding procedure combining the concepts of both local grid refinement and global grid moving has been developed for time-independent recirculating flow problems. The procedure starts with the global grid moving method which provides an initial adaptive solution. Base on this initial solution, large error regions are flagged and local refinement is then applied on the large error regions. The methods for error estimation and interface treatment are discussed. The procedure is assessed in a one-dimensional convection-diffusion equation, a driven polar cavity flow, and a laminar backward-facing step flow. Efficiencies of the various approaches are evaluated. Specifically, in the test problems, the hybrid adaptive grid solution requires less than one-tenth of the CPU time of that of the uniform fine grid solution to achieve the same accuracy. The procedure can be conveniently extended to three-dimensional, irregular geometry flow problems. 36 refs., 17 figs., 4 tabs.