Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Effect of Various Shapes of Mixer Geometry on Two-Phase Flow Patterns in a Micro-Channel

마이크로 채널 내 혼합부 형상이 2상 유동 양식에 미치는 영향에 대한 연구

  • Lee, Kwan Geun (Department of Mechanical Engineering, Kyungnam University) ;
  • Lee, Jun Kyoung (Department of Mechanical Engineering, Kyungnam University) ;
  • Park, Taehyun (Department of Mechanical Engineering, Kyungnam University) ;
  • Kim, Gyo Nam (Department of Food Science and Biotechnology, Kyungnam University) ;
  • Park, Eun Ju (Department of Food and Nutrition, Kyungnam University)
  • Received : 2014.09.03
  • Accepted : 2014.11.13
  • Published : 2015.02.10
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Abstract

The effect of inlet mixer geometries on the two-phase flow patterns in square micro-channel with $600{\times}600{\mu}m$ was investigated experimentally in this paper. The 4 different mixer configurations based on the Y, Impacting, and two T types (gas and liquid inlets were switched) were used. The test fluids were nitrogen and water. The liquid and gas superficial velocities were 0.01~10 m/s and 0.1~100 m/s, respectively. Several distinctive flow patterns, namely, annular, slug-annular, slug, slug-bubbly, bubbly, and churn flow could be seen. The flow pattern maps for each mixer were suggested, and it can be concluded that two-phase flow patterns are not very sensitive to the mixer geometries. But the mixing behaviors of gas and liquid for each mixer were different for slug and bubbly flow. Thus, the characteristics of slug and bubble for each case were not same.

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References

  1. Shui, L., Eijkel, J. C. T., and Berg, A. V. D., 2007, Multiphase flow in micro- and nanochannels, Sensors and Actuators B:Chemical, Vol. 121, No. 1, pp. 263-276. https://doi.org/10.1016/j.snb.2006.09.040
  2. Xu, J. H., Li, S. W., Wang, Y. J., and Luo, G. S., 2006, Controllable gas-liquid Phase flow patterns and monodisperse microbubbles in a microfluidic T-junction device, Applied Physics Letter, Vol. 88, No. 13, p. 133506. https://doi.org/10.1063/1.2189570
  3. Haverkamp, V., Hessel, V., Lowe, H., Menges, G., Warnier, M. J. F., Rebrov, E. V., Croon, M. H. J. M. D., Schouten, J. C., and Liauw, M. A., 2006, Hydrodynamics and mixer-induced bubble formation in micro bubble columns with single and multiple-channels, Chemical Engineering Technology, Vol. 29, No. 9, pp. 1015-1026. https://doi.org/10.1002/ceat.200600180
  4. Kawaji, M., Mori, K., and Bolintineanu, D., 2009, The effects of inlet geometry and gas-liquid mixing on two-phase flow in microchannels, Journal of Fluids Engineering, Vol. 131.
  5. Waelchli, S. and Rohr, P. R. V., 2006, Two-phase flow characteristics in gas-liquid microreactors, International Journal of Multiphase Flow, Vol. 327, No. 7, pp. 791-806.
  6. Triplett, K. A., Ghiaasiaan, S. M., Abdel-Khalik, S. I., and Sadowski, D. L., 1999, Gas-liquid two-phase flow in microchannels-Part I:two phase flow patterns, International Journal of Multiphase Flow, Vol. 25, No. 3, pp. 377-394. https://doi.org/10.1016/S0301-9322(98)00054-8
  7. Yue, J., Luo, L., Gonthier, Y., Chen, G., and Yuan, Q., 2008, An experimental investigation of gas-liquid two-phase flow in single microchannel contactors, Chemical Engineering Science, Vol. 63, No. 16, pp. 4189-4202. https://doi.org/10.1016/j.ces.2008.05.032
  8. Cubaud, T. and Ho, C. M., 2004, Transport of bubbles in square microchannels, Physics of Fluids, vol. 16, No. 12, pp. 4575-4585. https://doi.org/10.1063/1.1813871
  9. Waelchli, S. and Rohr, P. R. V., 2006, Two-phase flow characteristics in gas-liquid microreactors, International Journal of Multiphase Flow, Vol. 327, No. 7, pp. 791-806.
  10. Yue, J., Chen, G., and Yuan, Q., 2004, Pressure drops of single and two-phase flows through T-type microchannel mixers, Chemical Engineering Journal, Vol. 102, No. 1, pp. 11-24. https://doi.org/10.1016/j.cej.2004.02.001

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