摘要
本文对上游加扰动,空间发展的二维自由剪切层中的旋涡合并现象进行了数值模拟,方法是用一种空间、时间三阶精度的迎风差分格式解不可压Navier-Stokes方程和连续性方程,扰动函数依线性无粘稳定性理论而定。计算结果用脉线图和等涡线图等直观表示,并与本文作者的实验照片相互比较。
Numerical solutions are presented for the vortex merging in free shear layer, A spatial and temporal third order upwind differencing scheme is used to solve the incompressible Navier-Stokes and continuity equations. The applied forcing functions are based on-linear invisid stability theory. The computed results are visualized by means of streakline and isovorticity contour plots and agree quite well with the experimental results obtained by the authors.
出处
《力学学报》
EI
CSCD
北大核心
1989年第2期154-160,共7页
Chinese Journal of Theoretical and Applied Mechanics
关键词
自由剪切层
旋涡合并
数值模拟
large scale coherent structure, subharmonic forcing, vortex merging.
