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Phase-distribution mechanisms in turbulent low-quality two-phase flow in a circular pipe

Published online by Cambridge University Press:  20 April 2006

D. A. Drew  and
R. T. Lahey
D. A. Drew
Affiliation:
Rensselaer Polytechnic Institute, Troy, New York 12181, U.S.A.
R. T. Lahey
Affiliation:
Rensselaer Polytechnic Institute, Troy, New York 12181, U.S.A.
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Abstract

The radial distribution of the volumetric vapour (or void) fraction in steady, fully developed turbulent two-phase flow is described for vertical low-quality bubbly flows in a circular pipe. The analysis is based on the phasic equations of conservation of momentum in the axial and radial directions. Mixing-length theory is used to model the turbulent stresses in the continuous phase. The predicted flow structure shows three distinct regions. The ‘outer’ region, that is, the region away from the wall and the centre-line, has a uniform void distribution. For upflow, a bubble layer is predicted near the wall, while for downflow, vapour coring is predicted, with a peak in void fraction at the centre-line. These predictions are in agreement with observed void profiles.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 117 , April 1982 , pp. 91 - 106
Copyright
© 1982 Cambridge University Press

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References

Delhaye, J. M. 1968 Equations fondamentals des écoulments diphasiques. CEA-R-3429.
Drew, D. A., Lahey, R. T. & Sim, S. 1978 Radial phase-distribution mechanisms in two-phase flow. In Proc. OECD (NEA) CSNI Sec. Specialists Meeting on Transient Two-Phase Flow; Paris, June 1978, CSNI Rep. no. 31.
Ishii, M. 1975 Thermo-Fluid Dynamic Theory of Two-Phase Flow. Eyrolles.
Lahey, R. T. & Drew, D. A. 1979 The analysis of phase distribution in fully developed two-phase flows. In Proc. 2nd Multi-Phase Flow and Heat Transfer Symp.-Workshop. Hemisphere.
Oshinowo, T. & Charles, M. E. 1974 Vertical two-phase flow, Part 1, flow pattern correlations. Can. J. Ch. Engng 52, 25–35.Google Scholar
Serizawa, A. 1974 Fluid dynamic characteristics of two-phase flow. Ph.D. Thesis, Kyoto University, Japan.
Zuber, N. & Ishii, M. 1978 Relative motion and interfacial drag coefficient in dispersed twophase flow of bubbles, drops and particles. In Proc. 71st Ann. Meeting, Miami, A.I.Ch.E. Paper no. 56a.