Flutter-enhanced mixing in small-scale mixers

Enhancement of mixing via flow-induced flutter of a flexible membrane is explored for small-scale mixers that operate at low Reynolds numbers. Flow induced flutter and mixing in a duct flow is simulated using fully coupled fluid-structure-scalar interaction simulations including two-way coupling between the fluid and structure. The fluid and structural dynamics are analyzed and their impact on the mixing performance is characterized. The sensitivity of the system to the Reynolds number and to the membrane's size and shape are also examined. It is shown that these flutter mixers create complex vortex structures even at low Reynolds numbers and these vortex structures lead to complex stretching and folding of fluid interfaces resulting in rapid mixing. Published under license by AIP Publishing.

针对在低雷诺数下运行的小型混合器，探索了通过柔性膜的流致颤振来增强混合的方法。使用包括流体与结构之间双向耦合的全耦合流体 - 结构 - 标量相互作用模拟，对管道流中的流致颤振和混合进行了模拟。分析了流体和结构动力学，并对它们对混合性能的影响进行了表征。还研究了系统对雷诺数以及膜的尺寸和形状的敏感性。结果表明，这些颤振混合器即使在低雷诺数下也能产生复杂的涡旋结构，并且这些涡旋结构导致流体界面复杂的拉伸和折叠，从而实现快速混合。由AIP出版公司授权发布。