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Research Papers: Mass Transfer

Mass Transfer in Single Bends Under Annular Two Phase Flow Conditions

[+] Author and Article Information
H. Mazhar, D. Ewing, J. S. Cotton

Department of Mechanical Engineering,
McMaster University,
Hamilton ON, L8S 4L7, Canada

C. Y. Ching

Department of Mechanical Engineering,
McMaster University,
Hamilton ON, L8S 4L7, Canada
e-mail: chingcy@mcmaster.ca

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received May 8, 2013; final manuscript received November 6, 2013; published online January 31, 2014. Assoc. Editor: Oronzio Manca.

J. Heat Transfer 136(4), 043001 (Jan 31, 2014) (8 pages) Paper No: HT-13-1237; doi: 10.1115/1.4026009 History: Received May 08, 2013; Revised November 06, 2013

The distributions of the mass transfer coefficient in horizontal 90 deg bends were measured under a range of two phase annular flow conditions. A dissolving wall technique at a high Schmidt number (Sc = 1280) is used for the measurements. The maximum mass transfer occurred on the centerline of the bend outer wall at an angle of approximately 50 deg from the bend inlet under all tested conditions. The area of maximum mass transfer rate was found to span approximately 30 deg in the circumferential direction. A second region of enhanced mass transfer occurred on the latter part of the bend with a local maximum occurring slightly off the bend centerline in some cases. Changing the air and water superficial velocities (Jv = 22–30 m/s, JL = 0.17–0.41 m/s) showed that the air velocity had a larger effect on the mass transfer rates than the water velocity; however, the effect of the water velocity on the mass transfer was not insignificant.

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References

Poulson, B., 1999, “Complexities in Predicting Erosion Corrosion,” Wear, 233–235. pp. 497–504. [CrossRef]
Kim, S., Park, J. H., Kojasoy, G., Kelly, J. M., and Marshall, S. O., 2007, “Geometric Effects of 90-Degree Elbow in the Development of Interfacial Structures in Horizontal Bubbly Flow,” Nucl. Eng. Des., 237, pp. 2105–2121. [CrossRef]
Spedding, P. L., Benard, E., and Crawford, N. M., 2008, “Fluid Flow Through a Vertical to Horizontal 90 deg Elbow Bend III Phase Flow,” Exp. Therm. Fluid Sci., 32, pp. 827–843. [CrossRef]
Crawford, N. M., Cunningham, G., and Spedding, P. L., 1974, “Prediction of Pressure Drop for Turbulent Fluid Flow in 90 Degree Bends,” Proc. Inst. Mech. Eng., 217E, pp. 1–3. [CrossRef]
Spedding, P. L., Benard, E., and McNally, G. M., 2004, “Fluid Flow Through 90 Degree Bends,” Dev. Chem. Eng. Miner. Process., 12, pp. 107–128. [CrossRef]
Supa-Amornkul, S., StewardF. R., and ListerD. H., 2005, “Modeling Two-Phase Flow in Pipe Bends,” J. Pressure Vessel Technol., 127, pp. 204–209. [CrossRef]
Maddock, C., Lacey, P. M. C., and Patrick, M. A., 1974, “The Structure of Two Phase Flow in a Curved Pipe,” Int. J. Quantum Chem., Quantum Chem. Symp., 38, pp. 1–12.
Anderson, G. H., and Hills, P. D., 1974, “Two-Phase Annular Flow in Tube Bends,” Presented at Symposium Multiphase Flow Systems, Institute Chemical Engineers Symposium Ser. No. 38, University of Strathclyde, Paper J1.
Usui, K., Aoki, S., and Inoue, A., 1980, “Flow Behavior and Pressure Drop of Two Phase Flow in C-Shaped Bend in Vertical Plane, Upward Flow (I),” J. Nucl. Sci. Technol., 17(12), pp. 875–887. [CrossRef]
Poulson, B., 1993, “Advances in Understanding Hydrodynamic Effects on Corrosion,” Corros. Sci., 35(1–4), pp. 655–665. [CrossRef]
Poulson, B., 1991, “Measuring and Modeling Mass Transfer at Bends in Annular Two Phase Flow,” J. Chem. Eng. Sci., 64(4), pp. 1069–1082. [CrossRef]
Pecherkin, N., and Chekhovich, V., 2011, “Mass Transfer in Two-Phase Gas-Liquid Flow in a Tube and in Channels of Complex Configuration,” Mass Transfer in Multiphase Systems and it Applictaions, Vol. 155, Mohamed El-Amin, ed., InTech, Rijeka, Croatia, Chap. VIII.
Da Silva Lima, R. J., and Thome, J. R., 2012, “Two-Phase Flow Patterns in U-Bends and Their Contiguous Straight Tubes for Different Orientations, Tube, and Bend Diameters,” HVAC&R Res., 35, pp. 1439–1454. [CrossRef]
Villien, B., Zheng, Y., and Lister, D. H., 2001, “The Scalloping Phenomenon and Its Significance in Flow Assisted-Corrosion,” Twenty Sixth Annual CNS-CNA Student Conference.
Wilkin, S. J., Oates, H. S., and Coney, M., 1983, Mass Transfer on Straight Pipes and 90 deg Bends Measured by the Dissolution of Plaster, 1st ed., Central Electricity Research Laboratories, Surrey, UK.
Robinson, R. A., and Stokes, R. H., 1968, Electrolyte Solutions, 2nd ed., Butterworths, London.
Coleman, H. W., and Steele, W. G., 1999, Experimentation and Uncertainty Analysis for Engineers, 2nd ed., John Wiley & Sons, New York.
Chisholm, D., 1967, “A Theoretical Basis for the Lockhart Martinelli Correlation for Two-Phase Flow,” Int. J. Heat Mass Transfer, 10, pp. 1767–1778. [CrossRef]

Figures

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Fig. 1

Schematic of the test facility showing the main components of the flow loop

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Fig. 2

Schematic of the test section showing the section planes relative to (a) streamwise orientation (b) crosswise orientation

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Fig. 3

Comparison of the (a) mass removal and (b) mass transfer coefficient for different initial water bulk concentrations for Jv = 24.5 and JL = 0.28 m/s

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Fig. 4

Effect of water and air superficial velocity on the Sherwood number distribution for (a) Jv = 30.2 m/s, JL = 0.17, 0.28, and 0.41 m/s and (b) JL = 0.28 m/s, Jv = 22, 24.5, and 29.5 m/s

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Fig. 5

Streamwise Sherwood number profiles along the (a) outer wall and (b) inner wall for JL = 0.28 m/s and different JV

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Fig. 6

Streamwise Sherwood number profiles along the (a) outer wall and (b) inner wall for JV = 29.5 m/s and different JL

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Fig. 7

Azimuthal profiles of the Sherwood number for JL = 0.28 m/s and Jv = 29.5 m/s (), 24.5 m/s (), 22 m/s ()

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Fig. 8

Azimuthal profiles of the Sherwood number for Jv = 29.5 m/s and JL = 0.41 m/s (), 0.28 m/s (), 0.17 m/s ()

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Fig. 9

Effect of air and water superficial velocities on the mass transfer enhancement relative to the upstream straight pipe (Sh/Shpipe) at (a) the first maximum and (b) the secondary maximum. Note: Numbers in bold and italics represent the curent results and those from Ref. [11], respectively.

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