摘要
本文分析对比了5种用于非结构化网格的扩散项的离散格式的精度和运算量。结果表明,除简单投影法外,其它方法的精度相差不大,但计算量差别较大。在此基础上,改进了Kobayashi的法向梯度法,克服了它对网格质量依赖较强和易于发散的缺点。总的结果表明在非结构化网格上提高扩散通量的计算精度仍然是一个值得继续研究的问题。
The performance of five methods for diffusion flux calculation on unstructured grids was compared and the method of Kobayashi's was modified in this paper. It was showed that the accuracies of the methods except the project method are almost the same but the difference of calculation work and data structure are large. And it is showed that it is valuable to find a more accurate method for diffusion term on unstructured grids.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2005年第2期313-315,共3页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.50376043)石油大学211工程资助项目
关键词
非结构化网格
扩散项
离散格式
unstructured grids
diffusion term
discrete scheme
