Optimizing Concentration of Drag Reducing Polymer in Case of One- and Two-Phase Flow in 90° Copper Elbow
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Abstract
The rate of diffusion-controlled corrosion of 90° Copper Elbow by acidified dichromate has been investigated in relation to the following parameters: effect of solution velocity in the absence and presence of drag reducing polymer in case of liquid, gas, and solid flows on the rate of diffusion-controlled corrosion. The result has been obtained according to those equations: k α v 0.44 in the absence of drag reducing polymer, k α v 0.33 in case of liquid–solid and the presence of drag reducing polymer, k α v 0.36 in case of liquid–gas and the presence of drag reducing polymer
Keywords
Copper elbow Drag reducing polymer Liquid solid system Liquid gas system Rate of diffusion-controlled corrosion Two-phase flowList of Symbols
- A
Active area (cm2)
- d
Tube diameter (cm)
- k
Mass transfer coefficient inside elbow (cm/s)
- kd
Mass transfer coefficient in the presence of drag reducing polymer (cm/s)
- ks
Mass transfer coefficient in the presence of suspended solid (cm/s)
- v
Solution velocity (cm/s)
- T
Temperature of reaction (K)
- t
Time (s)
- μ
Viscosity (g/cm s)
- ρ
Density (g/cm3)
- α
% of enhancement
- Υ
Inhibition efficiency
References
- 1.M.G. Fontana, Corrosion engineering, 2nd edn. (McGraw Hill, New York, 1998)Google Scholar
- 2.M. El-Gammal, H. Mazhar, J.S. Cotton, C. Shefski, J. Pietralik, C.Y. Ching, The hydrodynamic effects of single-phase flow on flow accelerated corrosion in a 90-degree elbow. Int. J. Nucl. Eng. Des. 240, 1589–1598 (2010)CrossRefGoogle Scholar
- 3.B. Poulson, Complexities in predicting erosion corrosion. Int. J. Wear 200, 479–504 (1999)Google Scholar
- 4.L.I. Xiao, L.U. Tao, Analysis of corrosion failure of petrochemical pipe elbow. Int. J. Nucl. Mater. 12, 119–123 (2005)Google Scholar
- 5.W.H. Ahmed, Evaluation of the proximity effect on flow accelerated corrosion. Int. J. Ann. Nucl. Energy 37, 598–605 (2010)CrossRefGoogle Scholar
- 6.A. Whitea, Flow characteristics of complex soap systems. J. Non Newton. Fluid Mech. Nature 214, 585–586 (1967)Google Scholar
- 7.J.G. Savins, A stress-controlled drag-reduction phenomenon. J. Non Newton. Fluid Mech. Acta 6, 323–367 (1967)Google Scholar
- 8.B. Lu, X. Li, J.L. Zakin, Y. Talmon, A non-viscoelastic drag reducing cationic surfactant system. J. Non Newton. Fluid Mech. 71, 59–72 (1997)CrossRefGoogle Scholar
- 9.G.H. Jeffery, J. Bassett, R.C. Denney, Vogles, 5th edn. (Longman, New York, 1989)Google Scholar
- 10.M.H. Abdel-Aziz, I.A.S. Mansour, G.H. Sedahmed, Study of the rate of liquid–solid mass transfer controlled processes in helical tubes under turbulent flow conditions. Int. J. Chem. Eng. Process. 49, 643–648 (2010)CrossRefGoogle Scholar
- 11.G.H. Sedahmed, M.S.E. Abdo, M. Amer, G. Abdelatif, Mass transfer at a pipe inlet zone in relation to impingement corrosion. Int. J. Heat Mass Transf. 25, 443–451 (1998)CrossRefGoogle Scholar
- 12.C. Deslouis, I. Epelboin, B. Tnbollet, L. Viet, Flow of complex fluids past confined cylinders from macro to micro scale. Europhys. J. Non Newton. Fluid Mech. 52, 100–106 (1980)Google Scholar
- 13.N.I. Pecherkin, VYu. Chekhovich, Mass transfer in a two phase flow in curvilinear channel. J. Eng. Thermo-phys. 17, 113–119 (2008)CrossRefGoogle Scholar
- 14.B. Poulson, R. Robinson, The use of a corrosion process to obtain mass transfer data. Corros. Sci. 26, 265–280 (1986)CrossRefGoogle Scholar
- 15.S. Zhou, M.M. Stack, R.C. Newman, Characterization of synergistic effects between erosion and corrosion in an aqueous environment using electrochemical techniques. Corros. Sci. 52, 930–934 (1996)Google Scholar
- 16.K. Yuki, S. Hasegawa, T. Sato, H. Hashizume, K. Aizawa, H. Yamano, Matched refractive-index PIV visualization of complex flow structure in a three-dimensionally connected dual elbow. Nucl. Eng. Des. 241, 4544–4550 (2011)CrossRefGoogle Scholar