Measurement and Correlation of Pressure Drop for Gas-Liquid Two-phase Flow in Rectangular Microchannels

›› 2010, Vol. 18 ›› Issue (6): 940-947.

Measurement and Correlation of Pressure Drop for Gas-Liquid Two-phase Flow in Rectangular Microchannels

马友光, 季喜燕, 王东继, 付涛涛, 朱春英

School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, China

收稿日期:2010-06-17 修回日期:2010-09-01 出版日期:2010-12-28 发布日期:2010-12-28
通讯作者: MA Youguang, E-mail: ygma@tju.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China (20876107);the Opening Project of State Key Laboratory of Chemical Engineering (SKL-ChE-08B06)

Measurement and Correlation of Pressure Drop for Gas-Liquid Two-phase Flow in Rectangular Microchannels

MA Youguang, JI Xiyan, WANG Dongji, FU Taotao, ZHU Chunying

School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, China

Received:2010-06-17 Revised:2010-09-01 Online:2010-12-28 Published:2010-12-28
Supported by:
Supported by the National Natural Science Foundation of China (20876107);the Opening Project of State Key Laboratory of Chemical Engineering (SKL-ChE-08B06)

摘要/Abstract

摘要： The pressure drop of gas-liquid two-phase flow in microchannel is of fundamental importance in heat and mass transfer processes. In this work,the pressure drop of gas-liquid two-phase flow in horizontal rectangular cross-section microchannels was measured by a pressure differential transducer system. Water,ethanol and n-propanol were used as liquid phase to study the effects of capillary number on pressure drop;air was used as the gas phase. Four microchannels with various dimensions of 100 μm×200 μm,100 μm×400 μm,100 μm×800 μm and 100 μm×2000 μm(depth×width) were used for determining the influence of configuration on the pressure drop. Experimental results showed that in micro-scale,the capillary number also affected the pressure drop remarkably,and in spite of only one-fold difference in aspect ratio,the variation of pressure drop reached up to near three times under the same experimental conditions. Taking the effects of aspect ratio and surface tension into account,a modified correlation for Chisholm parameter C in the Chisholm model was proposed for predicting the frictional multiplier Φ₁²,and the predicted values by the proposed correlation showed a satisfactory agreement with experimental data.

关键词: pressure drop, rectangular cross-section microchannel, surface tension, configuration influence, Chisholm parameter C

Abstract: The pressure drop of gas-liquid two-phase flow in microchannel is of fundamental importance in heat and mass transfer processes. In this work,the pressure drop of gas-liquid two-phase flow in horizontal rectangular cross-section microchannels was measured by a pressure differential transducer system. Water,ethanol and n-propanol were used as liquid phase to study the effects of capillary number on pressure drop;air was used as the gas phase. Four microchannels with various dimensions of 100 μm×200 μm,100 μm×400 μm,100 μm×800 μm and 100 μm×2000 μm(depth×width) were used for determining the influence of configuration on the pressure drop. Experimental results showed that in micro-scale,the capillary number also affected the pressure drop remarkably,and in spite of only one-fold difference in aspect ratio,the variation of pressure drop reached up to near three times under the same experimental conditions. Taking the effects of aspect ratio and surface tension into account,a modified correlation for Chisholm parameter C in the Chisholm model was proposed for predicting the frictional multiplier Φ₁²,and the predicted values by the proposed correlation showed a satisfactory agreement with experimental data.

Key words: pressure drop, rectangular cross-section microchannel, surface tension, configuration influence, Chisholm parameter C

马友光, 季喜燕, 王东继, 付涛涛, 朱春英. Measurement and Correlation of Pressure Drop for Gas-Liquid Two-phase Flow in Rectangular Microchannels[J]. , 2010, 18(6): 940-947.

MA Youguang, JI Xiyan, WANG Dongji, FU Taotao, ZHU Chunying. Measurement and Correlation of Pressure Drop for Gas-Liquid Two-phase Flow in Rectangular Microchannels[J]. , 2010, 18(6): 940-947.

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Measurement and Correlation of Pressure Drop for Gas-Liquid Two-phase Flow in Rectangular Microchannels

Measurement and Correlation of Pressure Drop for Gas-Liquid Two-phase Flow in Rectangular Microchannels

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