Chaotic Mixing of Viscous Fluids in Continuous Flows: Basic Issues and Applications

将采用实验/数值模拟相结合的方法来研究通常不会发生湍流的强粘性流动中混沌混合现象的发生。这种现象被称为混沌平流，在二维几何中研究了许多随时间变化的流动强迫的情况。目前的研究是在三维几何中进行实验和数值模拟。要考虑的情况是一种新型的螺旋环形混合器和一种分隔管混合器，其中流体在管道中流动时周期性地重新定向。

A combined experimental/numerical simulation approach will be applied to study the onset of chaotic mixing phenomena in strongly viscous flows where ordinarily turbulence will not occur. This phenomenon is known as chaotic advection, and a number of cases have been studied in two-dimensional geometries with time-varying forcing of the flow. The present research is to conduct experiments and perform numerical simulations in three-dimensional geometries. The cases to be considered are a novel helical annular mixer and a partitioned pipe mixer in which the fluid is periodically reoriented as it flows down the pipe.