弱扰动 meaning in Chinese

weak disturbance

When increase the amplitude of the weak psb disturbance , slug structure is formed in pipe flow firstly , this is the first transition
当加大psb弱扰动的幅值后，流动中首先出现塞流结构，即第一次转捩。
When the psb amplitude is weak , a series of hair - pin vortex will be formed . the formation , diffusion , breakup of the front edge of hair - pin vortex and the break of the head of hair - pin vortex lead to the first instability and form the slug structure
在一定幅值的psb弱扰动作用下，圆管流动中出现一系列发卡涡，发卡涡前缘处环形涡的形成、扩散和破裂以及发卡涡头部的破碎导致了流动的第一次失稳，产生塞流结构。