摘要
在传统大涡模拟方法的基础上引入显式滤波技术,有效地控制了最小解析尺度区域的各种数值误差。对有限差分格式的守恒特性进行了研究,发展了适用于三维平板通道大涡模拟的四阶精度守恒格式。分别利用二阶和四阶精度的传统与显式滤波大涡模拟程序模拟平板通道内的湍流流动,将计算结果与DNS数据进行了对比,得到了合理结果。
Based on the traditional large eddy simulation (LES) approach,explicit filtering was introduced,which effectively controlled the numerical errors in the smallest resolved scales.The con- servation properties of finite difference schemes were studied and a scheme with fourth order accuracy was developed for the LES in 3-D channel flows.The 3-D turbulent channel flow was simulated using the traditional and explicit filtering LES schemes with second order and fourth order accuracy,respec- tively.Compared with the results from direct numerical simulation (DNS),the present results from the programs are fairly sound.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2007年第z1期93-96,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金项目资助(No.50576073)
关键词
大涡模拟
显式滤波
四阶精度
守恒特性
large eddy simulation
explicit filtering
fourth order accuracy
conservation property
