扣在翻译
Buckled in translation
摘要：
我们报告的实验中的弹性纤维的变形和运输的粘性细胞流，即一个格子的反旋转的漩涡。我们表明，纤维可以屈曲时，接近一个停滞点。通过调节流动或纤维特性，我们测量这种屈曲不稳定性的发生。屈曲阈值是由粘性和弹性力的相对强度，弹性粘性数SP。此外，我们表明，柔性纤维逃逸速度更快的旋涡（由封闭的流线形成）相比，刚性纤维。因此，纤维的变形改变了其在细胞流中的传输特性。
英文摘要：
We report experiments on the deformation and transport of an elastic fiber in a viscous cellular flow, namely a lattice of counter-rotative vortices. We show that the fiber can buckle when approaching a stagnation point. By tuning either the flow or fiber properties, we measure the onset of this buckling instability. The buckling threshold is determined by the relative intensity of viscous and elastic forces, the elasto-viscous number Sp. Moreover we show that flexible fibers escape faster from a vortex (formed by closed streamlines) compared to rigid fibers. As a consequence, the deformation of the fiber changes its transport properties in the cellular flow.
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