摘要
本文用直接数值模拟的方法计算了二维Poiseuille流动中扰动波的演化问题。得到了二维平衡态,在一定的波数下,Re3950时,这种平衡态,将变得不稳定,模拟发现出现第二周期解,即二次分叉。
We calculated the development of the 2D finiteamplitude waves in planePoiseuille flow by means of direct numerical simulation. We obtained the 2D nonlinear stable equilibrias and Hopf bifurcations occur when the equilibriaJs loss the stability in Re 3950. While second bifurcations occur,eddy near the walls moves into the core and act as the core flow. As the Revnolds number Re increases further,the flow changes into all random.
出处
《力学学报》
EI
CSCD
北大核心
1994年第6期752-756,共5页
Chinese Journal of Theoretical and Applied Mechanics
基金
中国科学院力学研究所非线性连续介质力学开放实验室资助课题