Characterization of micro-mixing in T-shaped micro-mixer

ZHAO Yuchao; YING Ying; CHEN Guangwen; YUAN Quan

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Characterization of micro-mixing in T-shaped micro-mixer

更新时间：2025-12-10

- Characterization of micro-mixing in T-shaped micro-mixer
- CIESC Journal Issue 8, (2006)
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- Online First：25 August 2006，
  
  Published：25 August 2006
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ZHAO Yuchao, YING Ying, CHEN Guangwen, et al. Characterization of micro-mixing in T-shaped micro-mixer[J]. CIESC Journal, 2006, (8).
DOI：

ZHAO Yuchao, YING Ying, CHEN Guangwen, et al. Characterization of micro-mixing in T-shaped micro-mixer[J]. CIESC Journal, 2006, (8). DOI：

摘要

以Villermaux-Dushman快速平行竞争反应为模型体系，研究了宽600 μm、深300 μm的T形微通道内的微观混合特性，着重考察了不同进出口结构、微通道长度、体积流量比等对微通道内流体微观混合效果的影响.实验结果表明：Péclet数在7.0×106～2.0×108之间，无返混;体积流量比愈小，离集指数Xs愈小，微观混合效果愈好.不同进出口结构尺寸、体积流量比对微观混合的影响取决于Reyonlds数的大小，Re<Rec时，影响较大，且随Re增加，Xs减小，微观混合效果愈好;Re>Rec时，Xs趋于定值，约为2.7×10-4，接近理想微观混合效果.

Abstract

The Villermaux-Dushman fast parallel competing reaction was used to determine quantitatively the micro-mixing performance in the T-shaped micromixer with 600 μm width and 300 μm depth. The flow was almost ideal plug flow in the Reynolds number range 55—1600 and its corresponding Péclet number ranged from 7.0×106 to 2.0×108.The effects of inlet and outlet scale

micro-channel length

volumetric flow ratio on the micro-mixing performance were studied in detail.The micro-mixing performance was expressed with segregation index

Xs.The smaller the Xs

the better the micro-mixing.The experimental results showed that Xs increased with increasing volumetric flow ratio at the same Re.There existed a critical Rec under the condition of different inlet and outlet geometric structures.Xs decreased with increasing Re when Re<Rec

while Xs reached about 2.7×10-4 and remained constant when Re>Rec

indicating that almost perfect mixing in the T-sharped micro-mixer was achieved.

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