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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Semi-Empirical Analysis of the Mass Transfer Characteristics of the Slug Flow in Vertical Mesoscale Tubes

작은 수직관을 흐르는 슬러그 유동의 물질전달 특성에 대한 반경험적 해석

  • Kim, Dong-Seon (Department of Mechanical Engineering, Korea National University of Transportation)
  • 김동선 (한국교통대학교 기계공학과)
  • Received : 2013.08.23
  • Accepted : 2014.05.20
  • Published : 2014.08.10
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Abstract

Experimental mass transfer data, which were obtained for the $CO_2$-water slug flows in vertical tubes with 2, 5, and 8mm diameters, were analyzed in comparison with the penetration theory. It was found that a penetration model with molecular diffusion coefficient cannot predict the experimental data accurately. An effective diffusion coefficient, which considers enhancement effect of interfacial waves, was suggested to improve prediction. Another empirical factor was also suggested to consider the effect of non-uniform interface velocity. A modified penetration model was found to be capable of predicting the experimental data reasonably well.

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References

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