论文标题
粘弹性通道流中局部干扰的分裂
Splitting of localized disturbances in viscoelastic channel flow
论文作者
论文摘要
我们检查了无惯性的粘弹性通道对局部扰动的响应。一个简化的模型表明，如果初始干扰和基本弹性应力足够高，速度和弹性应力场之间的非线性相互作用可以将初始脉冲干扰分为两个单独的脉冲。根据依据，我们证明可以通过实验实现向脉冲分解方案的过渡。这些结果表明，通过局部扰动的生长，在高弹性时研究粘弹性通道流动的弹性不稳定性可能是一个新的方向。
We examine the response of an inertia-less viscoelastic channel flow to localized perturbations. A simplified model shows that the non-linear interaction between the velocity and elastic stress fields can split an initial pulsed disturbance into two separate pulses if the initial disturbance and the base elastic stress are sufficiently high. In accordance, we demonstrate that a transition to a pulse-splitting regime can be achieved experimentally. These results suggest a possible new direction for studying the elastic instability of viscoelastic channel flows at high elasticity through the growth of localized perturbations.
