Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
권호 표지

Development of the Interfacial Area Concentration Measurement Method Using a Five Sensor Conductivity Probe

  • Published : 2000.10.01
Download PDF
⟨ Previous Next ⟩

Abstract

The interfacial area concentration (IAC) is one of the most important parameters in the two-fluid model for two-phase flow analysis. The IAC can be measured by a local conductivity probe method that uses the difference of conductivity between water and air/steam. The number of sensors in the conductivity probe may be differently chosen by considering the flow regime of two-phase flow. The four sensor conductivity probe method predicts the IAC without any assumptions of the bubble shape. The local IAC can be obtained by measuring the three dimensional velocity vector elements at the measuring point, and the directional cosines of the sensors. The five sensor conductivity probe method proposed in this study is based on the four sensor probe method. With the five sensor probe, the local IAC for a given referred measuring area of the probe can be predicted more exactly than the four sensor probe. In this paper, the mathematical approach of the five sensor probe method for measuring the IAC is described, and a numerical simulation is carried out for ideal cap bubbles of which the sizes and locations are determined by a random number generator.

Keywords

References

  1. M. Ishii, Thermo-fluid Dynamic Theory of Two-Phase Flow, Eyrolles, Science and Medical Publication of France, Paris, New York (1975)
  2. I. Kataoka, M. Ishii, and A. Serizawa,'Local Formulation of Interfacial Area Concentration', Int. J. Multiphase Flow, 12, 505(1986) https://doi.org/10.1016/0301-9322(86)90057-1
  3. S. T. Revankar and M. Ishii, 'Local Interfacial Area Measurement in Bubbly Flow', Int. J. Heat Mass Transfer, 35, 4, 913(1992) https://doi.org/10.1016/0017-9310(92)90257-S
  4. I. Kataoka and A. Serizawa, 'Interfaciel Area Concentration in Bubbly Flow', Nucl. Eng. Design, 120, 163 (1990) https://doi.org/10.1016/0029-5493(90)90370-D
  5. G. Kocamustafaogullari, W. D. Huang, and J. Razi, 'Measurement and Modeling of Average Void Fraction, Bubbly Size and Interfacial Area', Nucl. Eng. Des., 120, 163 (1994) https://doi.org/10.1016/0029-5493(94)90124-4
  6. Q. Wu and M. Ishii, 'Sensitivity Study on Double-Sensor Conductivity Probe for the Measurement of Interfacial Area. Concentration in Bubbly Flow', Int. J. Multiphase Flow, 25, 1, 155 (1999) https://doi.org/10.1016/S0301-9322(98)00037-8
  7. T. Hibiki, S. Hogsett, and M. Ishii, 'Local measurement of interfacial area, interfacial velocity and liquid turbulence in two-phase flow', Nuc. Eng. and Des., 184, 287 (1998) https://doi.org/10.1016/S0029-5493(98)00203-9
  8. M. Ishii and S. T. Revankar, Measurement of Interfacial Area Using Four Sensor Probe in Two Phase Flow, DOE/ER/14147, July (1991)
  9. M. J. Tan and M. Ishii, Interfacial Area Measurement Methods, ANL-89/5, Feb. (1989)
  10. S. T. Revankar and M. Ishii, 'Theory and Measurement of Local Interfacial Area Using a Four Sensor Probe in Two-Phase Flow', Int. J. Heat Mass Transfer, 36, 12, 2997(1993) https://doi.org/10.1016/0017-9310(93)90029-6
  11. G. B. Wallis, One-Dimensional Two-Phase Flow, p. 380, McGraw-Hill, New York, (1969)
  12. F. N. Peebles and H. J. Garber, 'Studies on the Motion Bubbles in Liquid', Chem. Eng. Progr., 49, 88(1953)
  13. R. M. Davis and G. I. Taylor, 'The Mechanics of Large Bubbles Rising through Extended Liquids and through Liquids in Tubes', Proc. Rey. Soc., 200, ser. A, 375, London (1950)