Numerical and Experimental Study of Two-phase Flow in Downward vertical Pipe

Document Type : Research Article

Authors

1 Mechanical Engineering Department, Shahid Chamran University of Ahvaz, Ahvaz, Iran.

2 Mechanical Engineering Department, Shahid Chamran University of Ahvaz, Ahvaz, Iran

3 2School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran.

Abstract

In this study the flow patterns in downward air-water two-phase flow was studied experimentally and numerically. An experimental setup was designed and fabricated to allow visual observation and camera recording. The setup includes a transparent vertical pipe with a diameter of 50 mm and height of 4 m. Water and air were used in the experiments and flow map was prepared by data obtained from a total of 391 test cases by changing in air and water superficial velocities. Using flow pattern map, obtained from experimental results, simulation of two-phase flow in downward pipe has been performed. Multi-fluid model with Eulerian-Eulerian approach was used in Ansys-Fluent software for numerical simulation. Comparison of numerical with experimental results shows acceptable agreement for all expected regimes from flow map and it can be concluded that for downward two-phase flow patterns prediction numerical methods can be used. At the end, the numerical flow pattern map was plotted and compared with experimental results which also show good agreement. Experimental and numerical values of superficial velocities in transition boundaries were also compared.

Keywords

Main Subjects

References

[1] E.M. Ozbayoglu, M.A. Ozbayoglu, Flow pattern and frictional-pressure-loss estimation using neural networks for UBD, Society of Petroleum Engineers, IADC/SPE 108340, (2007) 1-9.
[2] O. Bratland, Pipe Flow 2-Multiphase Flow Assurance, Flow Assurance Consulting, Thailand, 2009.
[3] A. Almabrok, Gas-Liquid Two-Phase Flow in Up and Down Vertical Pipes, PhD Thesis, Cranfeild University, 2013.
[4] D. Barnea, O. Shoham, Y. Taitel, Flow pattern transitions for vertical downward two-phase flow, Chemical Engineering Science, 37(5) (1982) 741-744.
[5] A.A. Kendoush, S.A.W. Al-khatab, Experiments on flow characterization in vertical downward two-Phase flow, Experimental Thermal and Fluid Science, 9 (1) (1994) 34-38.
[6] M. Ishii, S.S. Pranjape, S. Kim, X. Sun, Interfacial structures and interfacial area transport in downward two-phase bubbly flow, Multiphase flow, 30 (7-8), (2004) 779-801.
[7] J.Y. Lee, M. Ishii, N.S. Kim, Instantaneous and objective flow regime identification method for the vertical upward and downward co-current two-phase flow, Heat and Mass Transfer, 51(13-14) (2008) 3442-3459.
[8] M.S. Bhagwat, A. Ghajar, Similarities and differences in the flow patterns and void fraction in vertical upward and downward two phase flow, Experimental Thermal and Fluid Science, 39 (2012) 213-227.
[9] J.E. Julia, Y. Liu, T. Hibiki, M. Ishii, Local flow regime analysis in vertical co-current downward two-phase flow, Experimental Thermal and Fluid Science, 44 (2013) 345- 355.
[10] F. Raeiszadeh, E. Hajidavalloo, M. Behbahaninejad, P. Hanafizadeh, Effect of Pipe Rotation on Downward Co-current air-water flow in a vertical pipe, Multiphase Flow, 81 (2016) 1-14.
[11] R. Maryami, S. Farahat, M. H. Shafie Mayam, S. M. JavadPoor , Experimental Investigation of the Bubbly Drag Reduction in the Presence Reduction in the Presence of Axial Flow in the Couette-Taylor System, Amirkabir Journal of Sience & Research, 47(1) (2015) 33-45. (In Persian)
[12] S.C.K. De Schepper, G.J. Heynderickx, B.G. Marin, CFD modelling of all gas-liquid and vapor-liquid flow regimes predicted by the Baker chart, Chemical Engineering, 138 (2008) 349-357.
[13] T. Hibiki, H. Goda, S. Kim, M. Ishii, J. Uhle. Structure of vertical downward bubbly flow, Heat and Mass Transfer, 47 (2005) 1847–1862.
[14] M. R. Ansari, S. Rafiei Asl, N. Samkhaniani, Numerical simulation of slug flow pattern in T junction using volume of fluid method, Modares Mechanical Engineering, 15(10) (2015) 41-48. (In Persian)
[15] O.N. Kashinsky, P.D. Lobanov, M.A. Pakhomov, V.V. Randin, V.I. Terekhov, Experimental and numerical study of downward bubbly flow in a pipe, Heat and Mass Transfer, 49 (2007) 3717–3727.
[16] M.R. Rahimi, H. Karimi, Computational fluid dynamics modeling of downward bubbly flows, World Academy of Science, Engineering and Technology, 73 (2006) 832- 836.
[17] Hadidi, D. Jalali-Vahid, Numerical study of the uniform magnetic field effect on the interactions of bubbles in viscous liquid column, Modares Mechanical Engineering, 15(11) (2015) 293-302. (In Persian)
[18] A.R. Hasan, Void fraction in bubbly and slug flow in downward vertical and inclined systems, Society of Petroleum Engineers, SPE 26522, (1995) 172-176.
[19] H. Goda, T. Hibiki, S. Kim, M. Ishii, J. Uhle, Drift-flux model for downward two-phase flow, Heat and Mass Transfer, 46 (2003) 4835-4844.
[20] D. Dakshinamoorthy, Y. Dai, M. Agrawal, CFD modelling of bubbly, slug and annular flow regimes, Offshore Technology Conference, OTC 24245, 2013.
[21] P. Hanafizadeh, S. Ghanbarzadeh, M.H. Saidi, Visual technique for detection of gas–liquid two-phase flow regime in the airlift pump, Petroleum Science and Engineering, 75(3-4) (2011) 327-335.
[22] E. Stenmark, Multiphase Flow Models in Ansys CFD Software, M.Sc ‌Thesis, Department of Applied Mechanics, Charmles University of Technology, Goteberg, Sweden, 2013.
[23] ANSYS FLUENT, 16.0 User’s Guide. ANSYS Inc, 2015.
[24] Y. Shen, C.-O. Ng, A. Chwang, A two-fluid model of turbulent two-phase flow for simulating turbulent stratified flows, Ocean engineering, 30(2) (2003) 153- 161.
[25] I. Lun, R.K. Calay, A.E. Holdo, Modeling two-phase flows using CFD, Apply Energy, 53 (1996) 299–314.
[26] L. Szalinski, L.A. Abdulkareem, M.J. Da Silva, S. Thiele, M. Beyer, D. Lucas, V. Hernandez Perez, U. Hampel, B.J. Azzopardi, Comparative study of gas–oil and gas–water two-phase flow in a vertical pipe, Chemical Engineering Science, 65(2010) 3836-3848.
Amirkabir Journal of Mechanical Engineering
Volume 51, Issue 2
May and June 2019
Pages 413-426

Files

Share

How to cite

Statistics