微观流动中的奇点特征
Singular point characterization in microscopic flows
摘要：
我们提出了一种基于光阱的微流变学方法，以测量流体流动奇点周围的流体通量。我们实验证明了这种技术，将其应用到一组双折射球旋转由于光角动量的转移所产生的控制流的表征。与以前的技术不同，该方法能够区分在一个复杂的流和流的情况下，在所有的奇点;此外，它允许我们来表征奇点的稳定性。
英文摘要：
We suggest an approach to microrheology based on optical traps in order to measure fluid fluxes around singular points of fluid flows. We experimentally demonstrate this technique, applying it to the characterization of controlled flows produced by a set of birefringent spheres spinning due to the transfer of light angular momentum. Unlike the previous techniques, this method is able to distinguish between a singular point in a complex flow and the absence of flow at all; furthermore it permits us to characterize the stability of the singular point.
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