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首页> 外文期刊>AIChE Journal >Characterization of Flow and Mixing in an SMX Static Mixer
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Characterization of Flow and Mixing in an SMX Static Mixer

机译：SMX静态混合器中的流动和混合特性

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摘要

Laminar flow and mixing of a Newtonian fluid are characterized in a four-element Koch-Glitsch SMX static mixer. The computational analysis on a fine, unstructured mesh containing more than 3.5 million tetrahedral elements led to high-resolution numerical data for velocity and pressure. Computed pressure drops agreed excellently with those in the literature. The flow in this static mixer is essentially independent of the flow rate up to Re = 1, thereby causing the flow characteristics to deviate substantially from those observed when Re < 1. Furthermore, mixing behavior is examined using Lagrangian particle tracking simulations, as well as stiatistical methods to facilitate comparisons with experimental data. The mixing rate calculated from the simulations agreed closely with expermentally measured values. Both exponential decrease in the variation coefficient as a function of downstream length and the evolution of a self-similar mixing structure are both evidence of chaotic mixing in the SMX mixer.
机译：四元素Koch-Glitsch SMX静态混合器可表征层流和牛顿流体的混合。对包含超过350万个四面体元素的精细非结构网格的计算分析得出了速度和压力的高分辨率数值数据。计算的压降与文献中的压降非常一致。该静态混合器中的流量基本上与Re = 1之前的流量无关，从而导致流量特性与Re <1时观察到的流量特性大不相同。此外，使用拉格朗日粒子跟踪模拟以及刺激性方法，便于与实验数据进行比较。通过模拟计算得出的混合速率与实验测量值非常吻合。作为下游长度的函数的变异系数的指数减小和自相似混合结构的演变都是SMX混合器中混沌混合的证据。

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