Assessment of different methods of analysis to characterise the mixing of shear-thinning fluids in a Kenics KM static mixer using PLIF
Assessment of different methods of analysis to characterise the mixing of shear-thinning fluids in a Kenics KM static mixer using PLIF
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DOI：
10.1016/j.ces.2014.03.022
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发表时间：
2014-06
影响因子：
4.7
通讯作者：
F. Alberini;M. Simmons;A. Ingram;E. Stitt
中科院分区：
文献类型：
--
作者：
F. Alberini;M. Simmons;A. Ingram;E. Stitt
Kenics KM静态混合器的性能已被确定为具有相同或不同流变性的两种剪切稀化流体流的混合。平面激光诱导荧光（PLIF）已被用来获得混合器出口处的浓度分布，通过掺杂一个流体流与荧光染料的混合器入口上游。研究了静态混合器的尺度、总流量、流体流之间的流量比以及入口结构对静态混合器性能的影响。通过比较传统的混合措施（如变异系数和最大条纹面积）与文献中提出的最新替代方法（如Alberini等人（2014）开发的面积分布方法），检查不同方法对混合性能的适用性。还提出了一种通过确定其分布作为大小和浓度的函数来表征单个条纹的方法。这些发现说明了信息丰富的PLIF图像的复杂性，并强调了不同的分析方法可能是适当的下游过程的依赖性。
The performance of Kenics KM static mixers has been determined for the blending of two shear-thinning fluid streams with identical or different rheology. Planar Laser Induced Fluorescence (PLIF) has been used to obtain the concentration distribution at the mixer outlet by doping one fluid stream with fluorescent dye upstream of the mixer inlet. The effect of scale of the static mixer, total flow rate, flow ratio between the fluid streams and inlet configuration have been investigated. The applicability of different methods to characterise mixing performance is examined by comparing conventional mixing measures such as coefficient of variation and maximum striation area against recent alternative methods presented in the literature, such as the areal distribution method developed by Alberini et al. (2014). A method of characterising individual striations by determining their distribution as a function of size and concentration is also presented. These findings illustrate the complexity of information-rich PLIF images, and highlight how different methods of analysis may be appropriate given the dependencies of the downstream process.