Research Papers: Multiphase Flows

On the Performance of Air-Lift Pumps: From Analytical Models to Large Eddy Simulation

[+] Author and Article Information
E. M. Wahba

Mechanical Engineering Department,
American University of Sharjah,
Sharjah 26666, United Arab Emirates;
Mechanical Engineering Department,
Faculty of Engineering,
Alexandria University,
Alexandria 21544, Egypt
e-mail: emwahba@yahoo.com

M. A. Gadalla, D. Abueidda, A. Dalaq, H. Hafiz, K. Elawadi, R. Issa

Mechanical Engineering Department,
American University of Sharjah,
Sharjah 26666, United Arab Emirates

1Corresponding author.

Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received July 28, 2013; final manuscript received April 18, 2014; published online September 4, 2014. Assoc. Editor: Samuel Paolucci.

J. Fluids Eng 136(11), 111301 (Sep 04, 2014) (7 pages) Paper No: FE-13-1459; doi: 10.1115/1.4027473 History: Received July 28, 2013; Revised April 18, 2014

The present study investigates a hierarchy of models for predicting the performance of air-lift pumps. Investigated models range from simplified one-dimensional analytical models to large eddy simulation (LES). Numerical results from LES and from two different analytical models are validated against experimental data available from the air-lift pump research program at Alexandria University. Present LES employs the volume of fluid (VOF) method to model the multiphase flow in the riser pipe. In general, LES is shown to provide fairly accurate predictions for the air-lift pump performance. Moreover, numerical flow patterns in the riser pipe are in good qualitative and quantitative agreement with their corresponding experimental patterns and with flow pattern maps available in the literature. On the other hand, analytical models are shown to provide results that are of surprisingly comparable accuracy to LES in terms of predicting the pump performance curve. However, due to the steady one-dimensional nature of these models, they are incapable of providing information about the different flow patterns developing in the riser pipe and the transient nature of the pumping process.

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Ahmed, W. H., and Badr, H. M., 2012, “Dual-Injection Airlift Pumps: An Enhanced Performance,” Particulate Sci. Technol., 30(6), pp. 497–516. [CrossRef]
Shelton, S. V., and Stewart, S. W., 2002, “Bubble Pump Design for Single Pressure Absorption Refrigeration Cycles,” ASHRAE Trans., 108(1), pp. 867–876.
Hanafizadeh, P., Saidi, M. H., Karimi, A., and Zamiri, A., 2010, “Effect of Bubble Size and Angle of Tapering Upriser Pipe on the Performance of Airlift Pumps,” Particulate Sci. Technol., 28(4), pp. 332–347. [CrossRef]
Hanafizadeh, P., Karimi, A., and Saidi, M. H., 2011, “Effect of Step Geometry on the Performance of the Airlift Pump,” Int. J. Fluid Mech. Res., 38(5), pp. 387–408. [CrossRef]
Storch, B., 1975, “Extraction of Sludges by Pneumatic Pumping,” 2nd Symposium on Jet Pumps and Ejectors and Gas Lift Techniques, Churchill College, Cambridge, UK.
Kassab, S. Z., Kandil, H. A., Warda, H. A., and Ahmed, W. H., 2009, “Air-Lift Pumps Characteristics Under Two-Phase Flow Conditions,” Int. J. Heat Fluid Flow, 30(1), pp. 88–98. [CrossRef]
Ayatollahi, S., Narimani, M., and Moshfeghian, M., 2004, “Intermittent Gas Lift in Aghajari Oil Field, a Mathematical Study,” J. Petroleum Sci. Eng., 42(2), pp. 245–255. [CrossRef]
Stepanoff, A. J., 1929, “Thermodynamic Theory of Air-Lift Pump,” ASME Trans., 51, pp. 49–55.
Nicklin, D. J., 1963, “The Air Lift Pump Theory and Optimization,” Trans. Inst. Chem. Eng., 41, pp. 29–39.
Clark, N. N., and Dabolt, R. J., 1986, “A General Design Equation for Airlift Pumps Operating in Slug Flow,” AICHE J., 32(1), pp. 56–64. [CrossRef]
Reinemann, D. J., Parlange, J. Y., and Timmons, M. B., 1990, “Theory of Small-Diameter Airlift Pumps,” Int. J. Multiphase Flow, 16(1), pp. 113–122. [CrossRef]
Stenning, A. H., and Martin, C. B., 1968, “An Analytical and Experimental Study of Air Lift Pump Performance,” ASME J. Eng. Gas Turbines Power, 90(2), pp. 106–110. [CrossRef]
Griffith, P., and Wallis, G. B., 1961, “Two-Phase Slug Flow,” ASME J. Heat Transfer, 83(3), pp. 307–318. [CrossRef]
White, F. M., 2010, Fluid Mechanics, 7th ed., McGraw-Hill, New York.
Dhotre, M. T., Niceno, B., and Smith, B. L., 2008, “Large Eddy Simulation of a Bubble Column Using Dynamic Sub-grid Scale Model,” Chem. Eng. J., 136(2), pp. 337–348. [CrossRef]
Khalil, M. F., and Mansour, H., 1990, “Improvement of the Performance of an Air Lift Pump by Means of Surfactants,” Sixth International Symposium of Heat and Mass Transfer, Miami, FL.
Khalil, M. F., Elshorbagy, K. A., Kassab, S. Z., and Fahmy, R. I., 1999, “Effect of Air Injection Method on the Performance of an Air Lift Pump,” Int. J. Heat Fluid Flow, 20(6), pp. 598–604. [CrossRef]
Kassab, S. Z., Kandil, H. A., Warda, H. A., and Ahmed, W. H., 2007, “Experimental and Analytical Investigations of Airlift Pumps Operating in Three-Phase Flow,” Chem. Eng. J., 131(1), pp. 273–281. [CrossRef]
Hirt, C. W., and Nichols, B. D., 1981, “Volume of Fluid (VOF) Method for the Dynamics of Free Boundaries,” J. Comput. Phys., 39(1), pp. 201–225. [CrossRef]
Smagorinsky, J., 1963, “General Circulation Experiments With the Primitive Equations,” Monthly Weather Rev., 91(3), pp. 99–164. [CrossRef]
Brackbill, J. U., Kothe, D. B., and Zemach, C., 1992, “A Continuum Method for Modeling Surface Tension,” J. Comput. Phys., 100(2), pp. 335–354. [CrossRef]
Toutant, A., Chandesris, M., Jamet, D., and Lebaigue, O., 2009, “Jump Conditions for Filtered Quantities at an Under-Resolved Discontinuous Interface. Part 1: Theoretical Development,” Int. J. Multiphase Flow, 35(12), pp. 1100–1118. [CrossRef]
Herrmann, M., 2013, “A Sub-grid Surface Dynamics Model for Sub-Filter Surface Tension Induced Interface Dynamics,” Comput. Fluids, 87, pp. 92–101. [CrossRef]
Hirsch, C., 2007, Numerical Computation of Internal and External Flows, 2nd ed., Butterworth-Heinemann, Oxford, UK.
Patankar, S. V., and Spalding, D. B., 1972, “A Calculation Procedure for Heat, Mass and Momentum Transfer in Three-Dimensional Parabolic Flows,” Int. J. Heat Mass Transfer, 15(10), pp. 1787–1806. [CrossRef]
Weller, H. G., 1993, “The Development of a New Flame Area Combustion Model Using Conditional Averaging,” Imperial College of Science, Technology and Medicine, Tech. Report No. TF 9307.
Roache, P. J., 1998, Verification and Validation in Computational Science and Engineering, Hermosa, Albuquerque, NM.
Speziale, C. G., 1998, “Turbulence Modeling for Time-Dependent RANS and VLES: A Review,” AIAA J., 36(2), pp. 173–184. [CrossRef]
Celik, I. B., Cehreli, Z. N., and Yavuz, I., 2005, “Index of Resolution Quality for Large Eddy Simulations,” ASME J. Fluids Eng., 127(5), pp. 949–958. [CrossRef]
Alcamo, R., Micale, G., Grisafi, F., Brucato, A., and Ciofalo, M., 2005, “Large-Eddy Simulation of Turbulent Flow in an Unbaffled Stirred Tank Driven by a Rushton Turbine,” Chem. Eng. Sci., 60(8), pp. 2303–2316. [CrossRef]
Taitel, Y., Bornea, D., and Dukler, A. E., 1980, “Modeling Flow Pattern Transition for Steady Upward Gas–Liquid Flow in Vertical Tubes,” AICHE J., 26(3), pp. 345–354. [CrossRef]
Hanafizadeh, P., Ghanbarzadeh, S., and Saidi, M. H., 2011, “Visual Technique for Detection of Gas-Liquid Two-Phase Flow Regime in the Airlift Pump,” J. Petroleum Sci. Eng., 75(3), pp. 327–335. [CrossRef]


Grahic Jump Location
Fig. 2

Computational domain for the air-lift pump

Grahic Jump Location
Fig. 9

Contours of water volume fraction (air mass flow rate = 2 kg/h, H/L = 0.484) in the top portion of the riser pipe at (a) t = 10.2 s and (b) t = 14 s

Grahic Jump Location
Fig. 12

Time history of the water mass flow rate at the exit section of the riser pipe (air mass flow rate = 10 kg/h, H/L = 0.484)

Grahic Jump Location
Fig. 1

Schematic of the air-lift pump system

Grahic Jump Location
Fig. 3

Close-up view of the fine grid for the air injection region

Grahic Jump Location
Fig. 4

LES grid refinement results for the pump performance curve

Grahic Jump Location
Fig. 5

Air-lift pump performance curve at H/L = 0.484

Grahic Jump Location
Fig. 6

Air-lift pump performance curve at H/L = 0.74

Grahic Jump Location
Fig. 7

Time history of the water mass flow rate at the exit section of the riser pipe (air mass flow rate = 2 kg/h, H/L = 0.484)

Grahic Jump Location
Fig. 8

Numerical flow pattern prediction versus flow pattern map of Taitel et al. [31] for air mass flow rates of: (a) 1 kg/h, (b) 2 kg/h, (c) 4 kg/h, and (d) 10 kg/h

Grahic Jump Location
Fig. 10

Time history of the air inlet pressure (air mass flow rate = 2 kg/h, H/L = 0.484)

Grahic Jump Location
Fig. 11

Numerical flow patterns in the middle third of the riser pipe for H/L = 0.484 at different air mass flow rates (a) 1 kg/h, (b) 4 kg/h, and (c) 10 kg/h



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