【作者】 鲍敏； 金英子；

【Author】 Bao Min Jin Yingzi (Zhejiang Sci-Tech Univ.,The Province Key Laboratory of Modern Textile Technology)

【机构】 浙江理工大学现代纺织装备及技术实验室；

【摘要】 通过使用不同曲率的弯管组合,在流动过程中引入周期性变动的二次流,实现对流体内部微团运动的控制。根据流动的二次流动力学模型,建立了在整个管道内部不同截面之间流体微团运动的非线形映射关系,并研究了微团在该映射下的运动特征及其在混合上的应用效果。结果表明,相比采用统一曲率的弯管组合,采用变曲率弯管可以更有效地突破混沌映射截面上由周期点和不动点组成的常规区域,提高扭管系统的混合操作效率,实现在层流状态下的高效混合。更多还原

【Abstract】 A numerical analysis is carried out for the study of chaotic mapping and flow mixing effect in a periodically variant curvature pipe. The secondary approximation solution is achieved by Gelarkin method and spectral method. The result show the periodic pair-vortex induced from the secondary flow and its chaotic mapping, flow units is stretched and folded strongly, and mixed in an exponential way. The result also shows that the variant of the pipe curvature is more efficient in flow mixing than const curvature pipe.更多还原