Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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TURBULENCE MODULATION OF THE UPWARD TURBULENT BUBBLY FLOW IN VERTICAL DUCTS

  • Received : 2015.02.26
  • Accepted : 2015.04.23
  • Published : 2015.10.25
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Abstract

The present paper aims at improving the modeling of turbulence for the upward turbulent bubbly flow through the use of experimental databases that contain data on small and large vertical ducts. First, the role of bubble-induced turbulence was analyzed, which indicated the dominant role of the bubble-induced turbulence in the duct center for relatively high void fraction cases. Therefore, the turbulence therein was mainly focused on, which indicated that the stronger turbulence could be induced by bubbles in large ducts with similar void fractions as compared to that in small ducts. Next, the turbulence of upward turbulent bubbly flow near the wall is discussed to understand the interaction between the wall-induced and bubble-induced turbulence. It showed that the existence of a wall could suppress the bubble-induced turbulence given the same void fraction, and the existence of bubbles could also suppress the solely wall-induced turbulence as compared to the single-phase turbulent flow, even though the total turbulence is enhanced. The above characteristics indicated that the current turbulence modeling method needs to be modified, especially when the bubble-induced turbulence plays a dominant role.

Keywords

References

  1. A. Serizawa, Fluid Dynamics Characteristics of Two-phase Flow, Doctoral thesis, Kyoto University, 1974.
  2. A. Serizawa, I. Kataoka, I. Michiyoshi, Turbulence structure of air-water bubbly flowd-II. local properties, Int. J. Multiphase Flow 2 (1975) 235-246. https://doi.org/10.1016/0301-9322(75)90012-9
  3. I. Michiyoshi, A. Serizawa, Turbulence in two-phase bubble flow, Nucl. Eng. Des. 95 (1986) 253-267. https://doi.org/10.1016/0029-5493(86)90052-X
  4. A. Serizawa, I. Kataoka, Turbulence suppression in bubbly two-phase flow, Nucl. Eng. Des. 122 (1990) 1-16. https://doi.org/10.1016/0029-5493(90)90193-2
  5. S. Wang, S. Lee, O. Jones, R. Lahey, 3-D turbulence structure and phase distribution measurements in bubbly two-phase flows, Int. J. Multiphase Flow 13 (1987) 327-343. https://doi.org/10.1016/0301-9322(87)90052-8
  6. T.J. Liu, S.G. Bankoff, Structure of air-water bubbly flow in a vertical pipe-I. liquid mean velocity and turbulence measurements, Int. J. Heat Mass Transfer 36 (1993) 1049-1060. https://doi.org/10.1016/S0017-9310(05)80289-3
  7. M. Lance, J. Bataille, Turbulence in the liquid phase of a uniform bubbly air-water flow, J. Fluid Mech. 222 (1991) 95-118. https://doi.org/10.1017/S0022112091001015
  8. M. Lance, J. Bataille, Homogeneous turbulence in bubbly flows, J. Fluids Eng. 113 (1991) 295-300. https://doi.org/10.1115/1.2909495
  9. T. Hibiki, M. Ishii, Experimental study on interfacial area transport in bubbly two-phase flows, Int. J. Heat Mass Transfer 42 (1999) 3019-3035. https://doi.org/10.1016/S0017-9310(99)00014-9
  10. S. Hosokawa, A. Tomiyama, Turbulence modification in gaseliquid and solideliquid dispersed two-phase pipe flows, Int. J. Heat Mass Transfer 25 (2004) 489-498.
  11. S. Hosokawa, A. Tomiyama, Multi-fluid simulation of turbulent bubbly pipe flows, Chem. Eng. Sci. 64 (2009) 5308-5318. https://doi.org/10.1016/j.ces.2009.09.017
  12. M.E. Shawkat, C.Y. Ching, M. Shoukri, Bubble and liquid turbulence characteristics of bubbly flow in a large diameter vertical pipe, Int. J. Multiphase Flow 34 (2008) 767-785. https://doi.org/10.1016/j.ijmultiphaseflow.2008.01.007
  13. H.M. Sun, Study on Upward Air-water Two-phase Flow Characteristics in a Vertical Large Square Duct, Doctoral thesis, Kyoto University, 2014.
  14. T.G. Theofanous, J. Sullivan, Turbulence in two-phase dispersed flows, J. Fluid Mech. 116 (1982) 343-362. https://doi.org/10.1017/S0022112082000494
  15. L. van Wijngaarden, On pseudo turbulence, Theor. Comput. Fluid Dyn. 10 (1998) 449-458. https://doi.org/10.1007/s001620050076
  16. Y. Sato, M. Sadatomi, Momentum and heat transfer in two-phase bubble flow-I. Theory, Int. J. Multiphase Flow 7 (1981) 167-177. https://doi.org/10.1016/0301-9322(81)90003-3
  17. D.A. Drew, R.T. Lahey Jr., Phase distribution mechanisms in turbulent low-quality two-phase flow in a circular pipe, J. Fluid Mech. 117 (1982) 91-106. https://doi.org/10.1017/S0022112082001530
  18. I. Kataoka, A. Serizawa, Modeling and Prediction of Turbulence in Bubbly Two-phase Flow, Proc. 2nd Int. Conf. Multiphase Flow, Kyoto, MO2, 1995, pp. 11-16.
  19. I. Kataoka, A. Serizawa, Basic equations of turbulence in gas-liquid two-phase flow, Int. Multiphase Flow 5 (1989) 843-855.
  20. R.T. Lahey Jr., The analysis of phase separation and phase distribution phenomena using two-fluid models, Nucl. Eng. Des. 122 (1990) 17-40. https://doi.org/10.1016/0029-5493(90)90194-3
  21. R.T. Lahey Jr., M. Lopez de Bertodano, O.C. Jones Jr., Phase distribution in complex geometry conduits, Nucl. Eng., Des. 141 (1993) 177-201. https://doi.org/10.1016/0029-5493(93)90101-E
  22. M. Lopez de Bertodano, Turbulent Bubbly Two-phase Flow in a Triangular Duct, Doctoral thesis, Resselaer Polytechnic Institute, 1992.
  23. M. Lopez de Bertodano Jr., R.T. Lahey Jr., O.C. Jones, Development of a $k-{\varepsilon}$ model for bubbly two-phase flow, J. Fluids Eng. 116 (1994) 128-134. https://doi.org/10.1115/1.2910220
  24. C. Morel, Turbulence modeling and first simulations in turbulent two-phase flows, CEA Grenoble, France.
  25. A. Troshko, Y.A. Hassan, A two-equation turbulence model of turbulent bubbly flows, Int. J. Multiphase Flow 27 (2001) 1965-2000. https://doi.org/10.1016/S0301-9322(01)00043-X
  26. M.S. Politano, P.M. Carrica, J. Converti, A model for turbulent polydisperse two-phase flow in vertical channels, Int. J. Multiphase Flow 19 (2003) 1153-1182.
  27. J. Chahed, V. Roig, L. Masbernat, Eulerian-Eulerian two-fluid model for turbulent gas-liquid bubbly flows, Int. J. Multiphase Flow 29 (2003) 23-49. https://doi.org/10.1016/S0301-9322(02)00123-4
  28. R. Rzehak, E. Krepper, Bubble-induced turbulence: comparison of CFD models, Nucl. Eng. Des. 258 (2013) 57-65. https://doi.org/10.1016/j.nucengdes.2013.02.008
  29. R. Rzehak, E. Krepper, CFD modeling of bubble-induced turbulence, Int. J. Multiphase Flow 55 (2013) 138-155. https://doi.org/10.1016/j.ijmultiphaseflow.2013.04.007
  30. S.B. Pope, Turbulent flows, Cambridge University Press, Cambridge, 2000, pp. 267-322 (Chapter 7).

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