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Simulation of Entrainment Mass Transfer in Annular Two-Phase Flow Using the Physical Concept

Published online by Cambridge University Press:  05 May 2011

Z. Baniamerian  and
C. Aghanajafi
Z. Baniamerian*
Affiliation:
Mechanical Engineering Faculty, KNT University of Technology, Tehran, Iran
C. Aghanajafi*
Affiliation:
Mechanical Engineering Faculty, KNT University of Technology, Tehran, Iran
*
*Ph.D. student, corresponding author
**Associate Professor
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Abstract

Most of two-phase heat transfer analysis involve estimation of dry-out phenomenon in order to find whether it takes place and if so, at what location in the tube it will happen. Dry-out phenomenon considerably reduces heat transfer rate and it should be avoided as far as possible. Entrainment highly affects dry-out occurrence chance and location. Therefore a great attention should be paid on simulation of entrainment in order to have a good estimation of heat transfer and to safely design thermal systems.Although there are many models available for simulation of entrainment phenomenon, few are instrumentally employed in heat and fluid flow analyses, since most of those are empirical and limitedly can be applied due to the restricted conditions of experiments. There also are few theoretical approaches in the literature for simulating entrainment phenomenon by applying the physical potential of entrainment but some of those have a considerable deviation from the available empirical models. In the present study a conceptual approach is employed to simulate entrainment. In this regard the most important potential of this phenomenon, known as interfacial waves, are studied and modeled to find how they will lead to entrainment and how much the amount of entrainment is in vertical annular two-phase flows. An entrainment correlation is proposed at the end and will be compared with the available empirical ones for the verification objectives.

Keywords

Annular two-phase flowInterfacial wavesEntrainment phenomenonSurface tension.
Type
Articles
Information
Journal of Mechanics , Volume 26 , Issue 3 , September 2010 , pp. 385 - 392
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2010

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References

1. Woodmansee, D. and Hanratty, T., “Mechanism for the Removal of Droplets from a Liquid Surface by a Parallel Air Flow,” Journal of Chemical Engineering Science, 24, pp. 299–307 (1969).CrossRefGoogle Scholar
2.Hewitt, G. and Hall-Taylor, N., “Annular Two-Phase Flow,” Pergamum Press, New York (1970).Google Scholar
3.Collier, J. G. and Thome, J.R., “Convective Boiling and Condensation,” 3rdE., Clarendon Press Oxford, (1996).Google Scholar
4.Kataoka, I. and Ishii, M., “Mechanism and Correlation of Droplet Entrainment and Deposition in Annular Two- Phase Flow,” Technical Report, NUREG/CR–2885; ANL–82–44 (1982).Google Scholar
5.Ishii, M. and Grolmes, M. A., “Inception Criteria for Droplet Entrainment in Two-Phase Concurrent Film Flow,” Journal of American Institute of Chemical Engineering, 21, pp. 308–318 (1975).CrossRefGoogle Scholar
6.Kataoka, I., Ishii, M. and Nakayama, A., “Entrainment and Disposition Rates of Droplets in Annular Two-Phase Flow,” International Journal of Heat and Mass Transfer, 43, pp. 1573–1589(2000).CrossRefGoogle Scholar
7.Jiao, B., Qiu, L., Lu, J. and Gan, Z., “Liquid Film E)ryout Model for Predicting Critical Heat Flux in Annular wo-Phase Flow,” Journal of Zhejiang University Science A, 10, pp. 398–417 (2009).CrossRefGoogle Scholar
8.Sawant, P., Ishii, M. and Mori, M., “Droplet Entrainment Correlation in Vertical Upward Co-Current Annular Two-Phase Flow,” Journal of Nuclear Engineering and Design, 238, pp. 1342–1352 (2008).CrossRefGoogle Scholar
9.Okawa, T., Kotani, A., Kataoka, I. and Naito, I, “Prediction of Critical Heat Flux in Annular Flow Using a Film Flow Model,” Journal of Nuclear Science and Technology, 40, pp. 388–396 (2008).CrossRefGoogle Scholar
10.Kolev, N. I , “Multiphase Flow FJynamics 2-Thermal and Mechanical Interactions,” Springer, 3rd Ed., Berlin Heidelberg, (1998).Google Scholar
11.Schadel, S.A., Leman, G.W., Binder, J.L. and Hanratty, T. J., “Rates of Atomization and Deposition in Vertical Annular Flow,” International Journal of Multiphase Flow, 16, pp. 363–374 (1990).CrossRefGoogle Scholar
12.Lee, P. and Garimella, V. S., “Saturated Flow Boiling Heat Transfer and Pressure Drop in Silicon Micro channel Arrays,” International Journal of Heat and Mass Transfer, 51, pp. 789–806 (2008).CrossRefGoogle Scholar
13.Vashisth, S. and Nigam, K.D., “Prediction of Flow Profiles and Interfacial Phenomena for Two-Phase Flow in Coiled Tubes,” Journal of Chemical Engineering and Processing: Process Intensification, 48, pp. 452–463 (2008).CrossRefGoogle Scholar
14.Pan, L. and Hanratty, T.J., “Correlation of Entrainment for Annular Flow in Vertical Pipes,” International Journal of Multiphase Flow, 28, pp. 363–384 (2002).CrossRefGoogle Scholar
15.Barbosa, J.R., Hewitt, G.F., Konig, G. and Richardson, S.M., “Liquid Entrainment, Droplet Concentration and Pressure Gradient at the Onset of Annular Flow in a Vertical Pipe,” International Journal of Multiphase Flow, 28, pp. 943–961 (2002).CrossRefGoogle Scholar
16.Holowach, M.J. and Hochreiter, F.B., “A Model for Droplet Entrainment in Heated Annular Flow,” International Journal of Heat and Fluid Flow, 23, pp. 807–822 (2002).CrossRefGoogle Scholar
17.Zhao, L. W., Kamiel, S.G. and Zhen, F.Z., “The Effects of Gravity on the Features of the Interfacial Waves in Annular Two-phase Flow,” Journal of Microgravity Science and Technology, 15, pp. 19–27 (2008).Google Scholar
18.Wongwises, S. and Kongkiatwanitch, W., “Interfacial Friction Factor in Vertical Upward Gas-Liquid Annular Two-Phase Flow,” International Communication in Heat and Mass Transfer, 28, pp. 323–336, (2001).CrossRefGoogle Scholar
19.Thomas, D.A., “Modern Geometry,” Cole Publishing Company, United States (2002).Google Scholar
20.Hewitt, G.F. and Whalley, P.B., “The Correlation of Liquid Entrained Fraction and Entrainment Rate in Annular Two-Phase Flow,” UKAEA Report AERE–9187, (1978).Google Scholar
21.Sawant, P., Ishii, M., Hazukub, T., Takamasab, T. and Moric, M., “Properties of Disturbance Waves in Vertical Annular Two-Phase Flow,” Journal of Nuclear Engineering and Design, 238, pp. 3528–3541, (2008).CrossRefGoogle Scholar
22.Utsuno, H. and Kaminaga, F., “Prediction of Liquid Film Dry out in Two-Phase Annular-Mist Flow in a Uniformly Heated Narrow Tube Development of Analytical Method Under BWR Conditions,” Journal of Nuclear Science and Technology, 35, pp. 643–653, (1998).CrossRefGoogle Scholar