Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
권호 표지
DOI QR코드

DOI QR Code

Numerical Study on FC-72 Condensing Flow in a Micro-Channel

마이크로채널 내의 FC-72 흐름응축에 관한 수치적 연구

  • Kim, Sung-Min (School of Mechanical Engineering, Sungkyunkwan University)
  • Received : 2015.04.09
  • Accepted : 2015.04.28
  • Published : 2015.04.30
Download PDF
⟨ Previous Next ⟩

Abstract

This study concerns flow and heat transfer characteristics of FC-72 condensing flow in a micro-channel. A computational model of condensing flow with a hydraulic diameter of 1 mm is constructed using the FLUENT computational fluid dynamics code. The computed void fraction contour plots are presented for different mass velocities. The smooth-annular, wavy-annular, transition and slug flows are observed with the model, which are quite similar to those observed in a micro-channel experiment. The computed two-phase condensing heat transfer coefficient is compared with previous empirical correlation for two-phase condensation heat transfer in micro-channels.

Keywords

References

  1. Kim, S.M., Mudawar, I., 2014, "Review of databases and predictive methods for heat transfer in condensing and boiling mini/micro-channels flows," Int. J. Heat Mass Transfer, Vol.77, pp.627-652. https://doi.org/10.1016/j.ijheatmasstransfer.2014.05.036
  2. Kim, S.M., Mudawar, I., 2014, "Review of databases and predictive methods for pressure drop in adiabatic, condensing and boiling mini/microchannels flows," Int. J. Heat Mass Transfer, Vol.77, pp.74-97. https://doi.org/10.1016/j.ijheatmasstransfer.2014.04.035
  3. Kim, S.M., Mudawar, I., 2012, "Universal approach to predicting two-phase frictional pressure drop for adiabatic and condensing mini/micro-channel flow," Int. J. Heat Mass Transfer, Vol.55, pp.3246-3261. https://doi.org/10.1016/j.ijheatmasstransfer.2012.02.047
  4. Kim, S.M., Mudawar, I., 2013, "Universal approach to predicting heat transfer coefficient for condensing mini/micro-channel flow," Int. J. Heat Mass Transfer, Vol.56, pp.238-250. https://doi.org/10.1016/j.ijheatmasstransfer.2012.09.032
  5. ANSYS FLUENT 12.1 in Workbench User's Guide. ANSYS Inc., 2009, Canonsburg, PA.
  6. Hirt, C.W., Nichols, B.D., 1981, "Volume of fluid (VOF) method for the dynamics of free boundary," J. Computational Physics, Vol.39, pp.201-225. https://doi.org/10.1016/0021-9991(81)90145-5
  7. Lee, W.H., 1980, A pressure iteration scheme for two-phase flow modeling, in: T.N. Veziroglu, ed., Multiphase transport fundamentals, reactor safety, applications, vol. 1, Hemisphere Publishing, Washington, DC.
  8. Sun, D.-L., Xu, J.-L., Wang, L., 2012, "Development of a vapor-liquid phase change model for volumeof-fluid method in FLUENT," Int. Comm. Heat Mass Transfer, Vol.39, pp.1101-1106. https://doi.org/10.1016/j.icheatmasstransfer.2012.07.020
  9. Kim, S.M., Mudawar, I., 2012, "Flow condensation in parallel micro-channels - Part 1: Experimental results and assessment of pressure drop correlations," Int. J. Heat Mass Transfer, Vol.55, pp.971-983. https://doi.org/10.1016/j.ijheatmasstransfer.2011.10.013
  10. Kim, S.M., Mudawar, I., 2012, "Flow condensation in parallel micro-channels - Part 2: Heat transfer results and correlation technique," Int. J. Heat Mass Transfer, Vol.55, pp.984-994. https://doi.org/10.1016/j.ijheatmasstransfer.2011.10.012
  11. Lee, H., Kharangate, C.R., Mascarenhas, N., Park, I., Mudawar, I., 2015, "Experimental and computational investigation of vertical downflow condensation," Int. J. Heat Mass Transfer, Vol.85, pp.865-879. https://doi.org/10.1016/j.ijheatmasstransfer.2015.02.037
  12. Menter, F.R., 1994, "Two-equation eddy-viscosity turbulence models for engineering applications," AIAA J., Vol.32, pp.1598-1605. https://doi.org/10.2514/3.12149
  13. Brackbill, J.U., Kothe, D.B., Zemach, C., 1992, "A continuum method for modeling surface tension," J. Computational Physics, Vol.100, pp.335-354. https://doi.org/10.1016/0021-9991(92)90240-Y
  14. Issa, R.I., 1985, "Solution of the implicitly discretized fluid flow equations by operatorsplitting," J. Computational Physics, Vol.62, pp.40-65.