Void fraction and flow patterns of gas liquid two-phase flow in a microchannel

被引：0

作者：

Ide, Hideo ^{[1
]}

Kimura, Ryuji ^{[1
]}

Kawaji, Masahiro ^{[1
]}

机构：

[1] Department of Mechanical Engineering, Kagoshima University, Kagoshima-shi, Kagoshima, 890-0065

来源：

Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B | 2008年 / 74卷 / 06期

关键词：

Flow patterns; Gas-liquid two phase flow; Microchannel; Multiphase flow; Optical fiber sensor; Void fraction;

D O I：

10.1299/kikaib.74.1239

中图分类号：

学科分类号：

摘要：

An optical measurement system was developed to investigate the flow phenomena of gas-liquid two-phase flow in a circular microchannel with the diameter of 100 μm. From the output wave signals which correspond to the passages of the gas and the liquid by using multiple optical fibers and photodiodes, void fraction was measured successfully. The presence of a large compressible gas volume upstream of the mixing chamber had a significant effect on the two-phase flow characteristics in the microchannel, typified by the void fraction data. The flow patterns of bubbly flow, slug flow and ring film flow were observed. The characteristics of optical signal waves corresponding to these flow patterns have been described. The time averaged value of the optical signal wave agreed well with the space averaged value of the volume fraction of the gas from video image.

引用

页码：1239 / 1246

页数：7

共 7 条

[1]

Serizawa A., Feng Z., Kawara Z., Two phase flow in microchannels, Experimental Thermal and Fluid Science, 26, 6-7, pp. 703-714, (2002)

[2]

Chung P.M.Y., Kawaji M., The effect of channel diameter on adiabatic two phase flow characteristics in microchannels, International Journal of Multiphase Flow, 30, 7, pp. 735-761

[3]

Kawahara A., Chung P.M.Y., Kawaji M., Investigation of two phase flow pattern, void fraction and pressure drop in a microchannel, International Journal of Multiphase Flow, 28, 9, pp. 1411-1435, (2002)

[4]

Kawaji M., Mori K., Bolintineanu D., The effects of inlet geometry on gas-liquid two-phase flow in microchannels, Proceedings of ASME 3rd International Conference on Microchannels and Minichannels, Toronto, Canada, (2005-6), pp. 1-8

[5]

Chung P.M.-Y., Kawaji M., Kawahara A., Shibata Y., Two phase flow through square and circular microchannels effect of channel geometry, ASME Journal of Fluids Engineering, 126, 4, pp. 546-552, (2004)

[6]

Cubaud T., Ulmanella U., Ho C.M., Two-phase flow in microchannels with surface modifications, Proceedings of 5th International Conference on Multiphase Flow, ICMF'04, pp. 1-11, (2004)

[7]

Ali M.I., Sadatomi M., Kawaji M., Two-phase flow in narrow channels between two flat plates, The Canadian Journal of Chemical Engineering, 71, 5, pp. 657-666, (1993)

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