A Numerical Study of Flow Field and Oil Water Separation in Vertical Deadlegs

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Deadleg is a kind of blind pipe connected with a main pipe used for fluid transportation, which has distinct flow characteristics. This work aims to investigate the complex flow, oil/water separation and the relation between fluid flow and water concentration of a vertical deadleg. The investigation was based on the solution of algebraic slip mixture model, which calculated the continuity and momentum equations for the mixture of oil and water, and solved the volume fraction equation for the secondary phase. The computed results indicated that the mixing zone of the deadleg consists of two circulation vortexes and the whole mixing length depends on the inlet flow intensity. Furthermore, distinct oil/water stratification forms in the stagnant zone, and the maximum water volumetric concentration is related to the length of stagnant zone and also influenced by the flow intensity of the main pipe, which could increase from 25% to 72% with inlet velocity ranges from 0.75m/s to 5m/s.

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Periodical:

Edited by:

Dongye Sun, Wen-Pei Sung and Ran Chen

Pages:

2465-2470

DOI:

10.4028/www.scientific.net/AMM.121-126.2465

Citation:

K. Ding et al., "A Numerical Study of Flow Field and Oil Water Separation in Vertical Deadlegs", Applied Mechanics and Materials, Vols. 121-126, pp. 2465-2470, 2012

Online since:

October 2011

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$38.00

[1] P. Angell, C. Schefski, R. Richard, et al. Controlling Microbially Influenced Corrosion through Piping Geometry. 15th Service Water System Reliability Improvement (SWSRI) Seminar, Québec, Canada, August, (2004).

[2] E.D. Beaton, M.L. Serran, L. Sun et al. Numerical Simulation Of Mixing in Process Deadlegs in order to Model Microbiologically Influenced and Tuberculation at These Locations. NACE 10214, (2010).

[3] R. Moe, S. Sørbye, K. Skogen et al. A Comparison of Experimental Data and CFD Predicted Cool Down in Subsea Equipment, the 4th conference on CFD in the oil and gas, SINTEF/NTNU, Throndhein, (2005).

[4] H. Andersen. Computational study of heat transfer in subsea deadlegs for evaluation of possible hydrate formation, Master thesis, Faculty of Technology, Telemark University College, (2007).

[5] N.G. Musakaev, R.R. Urazov, V.S. Shagapov. Hydrate formation kinetics in piped natural gas flows, Thermophysics and Aeromechanics (2006), Vol. 13, No. 2.

DOI: 10.1134/s0869864306020090

[6] G.R. Bloom. Turbulent Hydraulic Penetration from Turbulent Pipe Flow to Stagnant Columns, Ph.D. Thesis, College of Engineering, Washington State University, (1978).

[7] M.A. Habib, H.M. Badr, S.A.M. Said. Characterisitcs of flow field and water concentration in a horizontal dedleg, Heat Mass Transfer (2005) 41: 315-326.

[8] M.A. Habib, S.A.M. Said, H.M. Badr, et al. Effect of geometry on flow field and oil/water separation in vertical deadlegs, International Journal for Numerical Methods in Heat & Fluid Flow (2005), Vol. 15 No. 4: 348-362.

DOI: 10.1108/09615530510590605

[9] M.A. Habib, H.M. Badr, S.A.M. Said. On the development of deadleg criterion, Transactions of ASME (2005), Vol. 127: 124-135.

[10] K. Asteriadou, A.P.M. Hasting. M.R. Bird, et al. Exploring CFD solutions for coexisting flow regimes in a T-piece, Chem. Eng. Technol(2009), Vol. 32 No. 6: 984-955.

DOI: 10.1002/ceat.200900060

[11] J. H. Young, W.C. Lasher, R.P. Gaber. Transport peocesses during sterilization of vertical and 5 degree horizontal dead-legs, Bioprocess Engineering(1995), Vol. 12: 293-304.

DOI: 10.1007/bf00369506

[12] K. Asteriadou, T. Hasting. M. Bird, et al. Predicting cleaning of equipment using computational fluid dynamics, Journal of Food Process Engineering(2007), Vol. 30: 88-105.

DOI: 10.1111/j.1745-4530.2007.00103.x

[13] C.J. Hwang and R. Pal. Flow of Two-Phase Oil/Water Mixtures Through Sudden Expansions and Contractions, Chem. Eng. J. (1997), Vol. 68: 157-163.

DOI: 10.1016/s1385-8947(97)00094-6

[14] GAMBIT 2. 4 Documentation, ANSYS/Fluent Inc., (2007).

[15] Fluent 6. 3 Documentation, ANSYS/Fluent Inc., (2006).

[16] D. Kuang, Z. Hongwu, Z. Jinya. Taking the Pulse of Subsea Trees Design Towards Deepwater Application, Advanced Materials Research (2011), Vols. 201-203: 1192-1197.

DOI: 10.4028/www.scientific.net/amr.201-203.1192

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