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Process intensification through Staggered Herringbone Micro-channels: mass transfer enhancement to a reactive wall
Chemical Engineering and Processing: Process Intensification ( IF 4.3 ) Pub Date : 2020-09-23 , DOI: 10.1016/j.cep.2020.108154
Alberto Cantu-Perez , Enrique A. López-Guajardo , Michel Romero-Flores , Krishna D.P. Nigam , Asterios Gavriilidis , Alejandro Montesinos-Castellanos

In the present study, the flow behaviour through different micro-herringbone channels configurations (1-peak, 2-peak, 1-2 alternated peak herringbone channel and a flow inversion geometry) have been numerically analysed as a mean of intensifying mass transfer to a reactive boundary. Results showed that the mass transfer coefficients were higher for the 1-2 alternated herringbone structure than those with, either, 1-peak or 2-peak structures. Moreover, the flow inversion structure mass transfer coefficients were double those obtained for the staggered herringbone channel. The alternated herringbone channel combines a different set of herringbone structures that are efficient at removing the boundary layer at different parts of the channel. The combination of these structures provide an enhanced mass transfer performance as compared to a standard herringbone channel. The obtained results showed that a 2D simplified model which uses hydrodynamic data from CFD simulations is a reasonable substitute for full 3D particle tracking simulations in terms of the mass transfer behavior of the 1PSHC with a 97.5% of accuracy related to the asymptotic Sherwood number.The mixing capacity of the herringbones was accounted for by an apparent effective diffusion coefficient. The agreement between the 3D and 2D simulation was reasonable.



中文翻译:

通过交错的人字形微通道强化工艺:增强向反应壁的传质

在本研究中,通过数值分析分析了通过不同的微人字形通道配置(1峰,2峰,1-2个交替的峰形人字形通道和流动反演几何形状)的流动行为,作为将质量转移到液体的方法。反应性边界。结果表明,1-2个交替的人字形结构的传质系数高于具有1个峰或2个峰结构的传质系数。而且,流转化结构的传质系数是交错人字形通道获得的传质系数的两倍。交替的人字形通道组合了一组不同的人字形结构,可有效去除通道不同部分的边界层。与标准的人字形通道相比,这些结构的组合提供了增强的传质性能。获得的结果表明,就1PSHC的传质行为而言,使用CFD模拟中的流体动力学数据的2D简化模型可以合理地替代完整的3D粒子跟踪模拟,其精确度与渐近Sherwood数有关的准确性为97.5%。人鱼骨的混合能力是由表观有效扩散系数引起的。3D和2D模拟之间的协议是合理的。与渐近舍伍德数有关的准确度为5%。人鱼骨的混合能力是由表观有效扩散系数引起的。3D和2D模拟之间的协议是合理的。与渐近舍伍德数有关的准确度为5%。人鱼骨的混合能力是由表观有效扩散系数引起的。3D和2D模拟之间的协议是合理的。

更新日期:2020-09-23
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