Chemical Engineering and Processing: Process Intensification ( IF 3.8 ) Pub Date : 2022-08-06 , DOI: 10.1016/j.cep.2022.109087 Shulei Chen , Ming Hao , Junyi Shang , Yue Jiang , Yuanhua Xie , Yaoshuai Ba , Kun Liu
This paper presents three-dimensional modified micromixers with staggered E-shape mixing units. Numerical analysis shows that an excellent mixing performance can be achieved in three-dimensional staggered E-shape mixers (3D SEMs) based on splitting-and-recombine (SAR) and chaotic advection. 3D SEM-3 can achieve a mixing index of over 70% in the flow regimes of 0.1 ≤ Reynolds number (Re) ≤ 1, which surpasses traditional two-dimensional and three-dimensional E-shape mixers (3D E-mixer). When Re > 50, our work indicates a mixing index of beyond 95%. The Poincaré mapping information and the logarithmic mean line stretching () were utilized to analyze the mixing dynamical process and mixing performance without diffusion. The mapping of particles at outlets shows that there is a more uniform distribution of particles in 3D SEMs at Re = 0.1 and 50, indicating better mixing performance. As the line of tracking particles is released from the center of the main channel of 3D SEM-3, the linear relation between and the number of mixing units reveals the generation of chaotic flow in proposed mixers. The larger mixing index of 3D SEMs at the same pressure drop than the 3D E-mixer demonstrates the mixing performance of the proposed micromixer comprehensively.
中文翻译:
具有交错E型混合单元的改进微混合器的数值分析
本文介绍了具有交错 E 形混合单元的三维改性微混合器。数值分析表明,基于分裂重组(SAR)和混沌平流的三维交错E形混合器(3D SEM)可以实现优异的混合性能。3D SEM-3在0.1≤雷诺数(Re)≤1的流态下可以达到70%以上的混合指数,超过了传统的二维和三维E型混合器(3D E-mixer)。当 Re > 50 时,我们的工作表明混合指数超过 95%。Poincaré 映射信息和对数平均线拉伸 () 用于分析混合动力过程和无扩散混合性能。出口处的颗粒映射表明,在 Re = 0.1 和 50 时,3D SEM 中的颗粒分布更均匀,表明混合性能更好。由于跟踪粒子线从 3D SEM-3 的主通道中心释放,之间的线性关系混合单元的数量揭示了所提出的混合器中混沌流的产生。在相同压降下,3D SEM 的混合指数比 3D E-mixer 大,全面展示了所提出的微混合器的混合性能。