Mixing in a multi-inlet vortex mixer (MIVM) for flash nano-precipitation
Mixing in a multi-inlet vortex mixer (MIVM) for flash nano-precipitation
复制标题
DOI：
10.1016/j.ces.2007.10.020
复制
发表时间：
2008-06-01
影响因子：
4.7
通讯作者：
Fox, Rodney O.
中科院分区：
文献类型：
--
作者：
Liu, Ying;Cheng, Chungyin;Fox, Rodney O.
有机和无机化合物在高过饱和度下的快速沉淀需要均匀混合以控制粒度分布。我们提出了一种新的多入口涡流混合器（MIVM）的设计和表征。四流MIVM允许通过改变流速来控制过饱和度和最终溶剂质量。该设计还能够在混合之前分离反应组分。最后，该设计使得能够混合不等体积流量的流，这对于交替的受限冲击射流混合几何形状是不可能的。我们使用竞争性快速反应（所谓的“伯恩反应”）的MIVM的混合性能的特点。当Re > 1600时，适当定义的雷诺数可获得充分的微观混合。实验结果进行了比较，计算流体动力学（CFD）模拟的流体力学和并行反应的MIVM。在没有可调参数的情况下，仿真结果与实验结果之间具有良好的对应关系。CFD模拟为这些复杂混合几何形状的优化提供了强有力的工具。(C)2007年由Elsevier Ltd.出版
Rapid precipitation of both organic and inorganic compounds at high supersaturation requires homogenous mixing to control the particle size distribution. We present the design and characterization of a new multi-inlet vortex mixer (MIVM). The four-stream MIVM allows control of both the supersaturation and the final solvent quality by varying stream velocities. The design also enables the separation of reactive components prior to mixing. Finally, the design enables mixing of streams of unequal volumetric flows, which is not possible with alternate confined impinging jet mixing geometries. We characterize the mixing performance of the MIVM using competitive fast reactions (the so-called "Bourne reactions"). Adequate micromixing is obtained with a suitably defined Reynolds number when Re > 1600. The experimental results are compared to computational fluid dynamics (CFD) simulations of the fluid mechanics and parallel reactions in the MIVM. Excellent correspondence is found between the simulation and the experimental results with no adjustable parameters. The CFD simulations provide a powerful tool for the optimization of these complex mixing geometries. (C) 2007 Published by Elsevier Ltd.