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Formation of Droplets of Shear-Thinning Non-Newtonian Fluids in Asymmetrical Parallelized Microchannels
Langmuir ( IF 3.7 ) Pub Date : 2023-02-01 , DOI: 10.1021/acs.langmuir.2c02736 Yanpeng Dong 1 , Xingyu Xiang 1 , Zhongdong Wang 1 , Chunying Zhu 1 , Youguang Ma 1 , Taotao Fu 1
Langmuir ( IF 3.7 ) Pub Date : 2023-02-01 , DOI: 10.1021/acs.langmuir.2c02736 Yanpeng Dong 1 , Xingyu Xiang 1 , Zhongdong Wang 1 , Chunying Zhu 1 , Youguang Ma 1 , Taotao Fu 1
Affiliation
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Fluids containing polymers are frequently utilized in the chemical industry and exhibit shear-thinning characteristics. The flow distribution of non-Newtonian fluids in parallelized microchannels is a key issue to be solved during numbering-up. Numbering-up means increasing the number of parallelized microchannels. In this study, a high-speed camera is used to explore the distribution of fluid flow as well as the uniformity and stability of droplets in conceptual asymmetrical parallelized microchannels. Cyclohexane and carboxymethylcellulose sodium (CMC) aqueous solutions are used as the continuous phase and dispersed phase, respectively. The effects of fluctuation of pressure difference around the T-junction, the hydrodynamic resistance in microchannels, and the shear-thinning property of fluids on flow distribution and droplet formation are revealed. The uniformity and stability of droplets in microdevices with various cavity settings are compared, and an optimal configuration is proposed. Finally, prediction models for the flow distribution of shear-thinning fluids in asymmetrical parallelized microchannels are established.
中文翻译：
非对称平行微通道中剪切稀化非牛顿流体液滴的形成
含有聚合物的流体经常用于化学工业并表现出剪切稀化特性。非牛顿流体在并联微通道中的流量分布是递增过程中需要解决的关键问题。向上编号意味着增加并行微通道的数量。在这项研究中，高速摄像机用于探索概念性非对称平行微通道中流体流动的分布以及液滴的均匀性和稳定性。环己烷和羧甲基纤维素钠（CMC）水溶液分别用作连续相和分散相。T型接头周围压力差波动的影响，微通道中的流体动力阻力，揭示了流体的剪切稀化特性对流动分布和液滴形成的影响。比较了具有不同腔设置的微器件中液滴的均匀性和稳定性，并提出了最佳配置。最后，建立了非对称平行微通道中剪切稀化流体流动分布的预测模型。
更新日期：2023-02-01
中文翻译：
非对称平行微通道中剪切稀化非牛顿流体液滴的形成
含有聚合物的流体经常用于化学工业并表现出剪切稀化特性。非牛顿流体在并联微通道中的流量分布是递增过程中需要解决的关键问题。向上编号意味着增加并行微通道的数量。在这项研究中，高速摄像机用于探索概念性非对称平行微通道中流体流动的分布以及液滴的均匀性和稳定性。环己烷和羧甲基纤维素钠（CMC）水溶液分别用作连续相和分散相。T型接头周围压力差波动的影响，微通道中的流体动力阻力，揭示了流体的剪切稀化特性对流动分布和液滴形成的影响。比较了具有不同腔设置的微器件中液滴的均匀性和稳定性，并提出了最佳配置。最后，建立了非对称平行微通道中剪切稀化流体流动分布的预测模型。
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