Gas-liquid-liquid three-phase micro-scaled dispersion process in a double T-junction microchannel device

doi:10.3969/j.issn.0438-1157.2013.02.009

CIESC Journal ›› 2013, Vol. 64 ›› Issue (2): 470-475.DOI: 10.3969/j.issn.0438-1157.2013.02.009

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Gas-liquid-liquid three-phase micro-scaled dispersion process in a double T-junction microchannel device

WANG Kai, LV Yangcheng, QIN Kang, LUO Guangsheng

State Key Laboratory of Chemical Engineering, Tsinghua University, Beijing 100084, China

Received:2012-07-27 Revised:2012-09-10 Online:2013-02-05 Published:2013-02-05
Supported by:
supported by the National Natural Science Foundation of China(21036002,21106076) and the State Key Laboratory of Chemical Engineering(SKL-CHE-11A01).

双T型微通道内气液液三相分散规律

王凯, 吕阳成, 秦康, 骆广生

清华大学,化学工程联合国家重点实验室,北京 100084

通讯作者: 王凯(1983—),男,助理研究员。
作者简介:王凯(1983—),男,助理研究员。
基金资助:
国家自然科学基金项目(21036002,21106076);化学工程联合国家重点实验室开放课题项目(SKL-CHE-11A01)。

Abstract

Abstract: The fluid dynamics of the gas-liquid-liquid three-phase micro-dispersion process was studied in a double T-junction microchannel device.Two main flow patterns named "gas-in-oil-in-water coupled emulsion flow" and "bubble contained oil-water parallel flow" were observed and the effects of fluid feeding sequence, superficial velocity and confined microchannel on those flow patterns were discussed.A flow pattern map was established based on the experimental result to describe the flow pattern evolution.Mono-dispersed micro-bubbles with average volume ranging from 22 nl to 54 nl were controllably prepared together with the gas-in-oil coupled dispersed phase, whose average volume changed from 60 nl to 81 nl.Based on the Rayleigh-Plateau break-up mechanism of gas phase, mathematical equations were established to calculate the dispersed volumes of bubbles and coupled emulsions.

Key words: microstructured chemical system, microfluidic, microchannel, gas-liquid-liquid three-phase

摘要： 研究了双T型微通道内气液液三相微分散过程,获得了水包油包气复乳型三相流和含有气泡的液液平行流两种主要流型,探讨了流体的进料顺序、三相表观流速和微通道内受限空间对于三相流型的影响,建立了流型分布图表。制备了平均体积在22～54 nl的单分散微气泡和平均体积在60～81 nl的油包气复合分散流体,根据气相在Rayleigh-Plateau效应下的破碎机制建立了基于气液相比的分散尺寸数学模型。

关键词: 微化工系统, 微流控, 微通道, 气液液三相

CLC Number:

TQ025.5

WANG Kai, LV Yangcheng, QIN Kang, LUO Guangsheng. Gas-liquid-liquid three-phase micro-scaled dispersion process in a double T-junction microchannel device[J]. CIESC Journal, 2013, 64(2): 470-475.

王凯, 吕阳成, 秦康, 骆广生. 双T型微通道内气液液三相分散规律[J]. 化工学报, 2013, 64(2): 470-475.

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Gas-liquid-liquid three-phase micro-scaled dispersion process in a double T-junction microchannel device

双T型微通道内气液液三相分散规律

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