Two-dimensional two-fluid model for air-oil wavy flow in horizontal tube
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This study concerns the development of a two-dimensional two-fluid model for wavy flows in horizontal tubes. To deal with the curved walls of the liquid and gas phases and the gas-liquid interface simultaneously, the bipolar coordinate system was used. Experiments on air-oil mixture flow in horizontal tubes with diameters of 20 and 40 mm were conducted to observe wavy flow patterns accompanying the two-dimensional (2D) and Kelvin-Helmholtz (KH) waves and to measure the pressure gradient under different flow conditions. Two different previous correlations for the interfacial friction factor were employed in the model for predicting the wavy flows with 2D and KH waves. Predictions of the model of the liquid film height, the average values of wall shear stresses of each phase, and the average interfacial shear stress were compared for different diameters and different superficial gas and liquid Reynolds numbers. Also presented are detailed predictions of the model for four different flow conditions, including the local values of interfacial shear stress, wall shear stress of the liquid phase, interfacial friction factor, liquid film height, and two-dimensional velocity distribution in the liquid phase at the cross-section of the tube.
KeywordsTwo-phase flow Pressure gradient Liquid holdup Interfacial shear stress Two-dimensional wave Kelvin-Helmholtz wave
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This work was supported by a Korea Agency for Infrastructure Technology Advancement (KAIA) grant funded by the Ministry of Land, Infrastructure and Transport (Grant 1615009756).
- V. P. Carey, Liquid-vapor Phase-change Phenomena: An Introduction to the Thermophysics of Vaporization and Condensation Processes in Heat Transfer Equipment, Hemisphere Publishing Corp., Washington D.C., USA (1992).Google Scholar
- J. G. Collier and J. R. Thome, Convective Boiling and Condensation, 3rd Ed., Clarendon Press, Oxford, NY, USA (1994).Google Scholar
- J. E. Kowalski, Wall and interfacial shear stress in stratified flow in a horizontal pipe, AIChE J., 33 (2) (1987) 274- 281.Google Scholar
- T. J. Hanratty and M. J. McCready, Phenomenological understanding of gas-liquid separated flows, Proc. of the Third International Workshop on Two-Phase Flow Fundamentals, Imperial College, London, UK (1992).Google Scholar
- F. P. Incropera, D. P. Dewitt, T. L. Bergman and A. S. Lavine, Fundamentals of Heat and Mass Transfer, 7th Ed., Wiley, Hoboken, NJ, USA (2011).Google Scholar
- A. W. Etchells, Stratified Horizontal Two Phase Flow in Pipe, Doctoral Dissertation, University of Delaware, Newark, DE, USA (1970).Google Scholar
- E. W. Lemmon, M. L. Huber and M. O. McLinden, Reference fluid thermodynamic and transport properties, REFPROP Version 8.0, NIST, MD, USA (2007).Google Scholar
- W. H. McAdams, W. K. Woods and L. C. Heroman, Vaporization inside horizontal tubes - II: Benzene-oil mixture, Transactions of ASME, 64 (1942) 193–200.Google Scholar
- W. W. Akers, H. A. Deans and O. K. Crosser, Condensing heat transfer within horizontal tubes, Chemical Engineering Progress, 54 (1958) 89–90.Google Scholar
- R. W. Lockhart and R. C. Martinelli, Proposed correlation of data for isothermal two-phase, two-component flow in pipes, Chemical Engineering Progress, 45 (1949) 39–48.Google Scholar
- L. Friedel, Improved friction pressure drop correlations for horizontal and vertical two-phase pipe flow, Proc. of European Two-phase Group Meeting, Ispra, Italy (1979) Paper E2.Google Scholar
- P. L. Spedding and J. J. J. Chen, Correlation of holdup in two-phase flow, ANSAAS, 49 (1979) 16.Google Scholar
- B. S. Shiralkar, Two-phase Flow and Heat Transfer in Multirod Geometrics: A Study of the Liquid Film in Adiabatic Air-water Flow with and without Obstacles, No. GEAP-10248, General Electric Corporation, San Jose, California, Atomic Power Equipment Department (1970).Google Scholar