Effects on the mixing process of a coiled tube after a T-junction: Simulation and correlation

doi:10.1016/j.cjche.2018.04.003

Chinese Journal of Chemical Engineering ›› 2018, Vol. 26 ›› Issue (12): 2441-2447.DOI: 10.1016/j.cjche.2018.04.003

• Fluid Dynamics and Transport Phenomena • 上一篇下一篇

Effects on the mixing process of a coiled tube after a T-junction: Simulation and correlation

Shan Zhu, Kai Wang, Yangcheng Lü

State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

收稿日期:2018-03-16 修回日期:2018-04-07 出版日期:2018-12-28 发布日期:2019-01-09
通讯作者: Yangcheng Lü
基金资助:
Supported by the National Natural Science Foundation of China (21422603, U166212) and the National Science and Technology Support Program of China (2011BAC06B01).

Effects on the mixing process of a coiled tube after a T-junction: Simulation and correlation

Shan Zhu, Kai Wang, Yangcheng Lü

State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

Received:2018-03-16 Revised:2018-04-07 Online:2018-12-28 Published:2019-01-09
Contact: Yangcheng Lü
Supported by:
Supported by the National Natural Science Foundation of China (21422603, U166212) and the National Science and Technology Support Program of China (2011BAC06B01).

摘要/Abstract

摘要： Simulations were performed to examine the effects of a coiled tube after a T-junction on the mixing and flow characteristics. A coiled tube was found to have two effects:inducing a radial flow and flattening the axial velocity distribution, which enhances and weakens the mixing, respectively. In the straight tube section connecting the T-junction and coiled tube, the latter may dominate and cause the mixing to deteriorate. An experiment was performed with the Villermaux/Dushman method to verify the simulation results. Based on a mixing performance simulation with various fluid and geometric structure parameters, a dimensionless correlation was obtained that can be used to determine the mixing intensity along the coiled tube with a deviation of less than 1.5%. These results provide guidance for designing a coiled tube or optimizing the operating conditions to meet the mixing requirements of specific chemical processes.

关键词: Mixing, T-junction, Simulation, Coiled tube, Correlation, Flow

Abstract: Simulations were performed to examine the effects of a coiled tube after a T-junction on the mixing and flow characteristics. A coiled tube was found to have two effects:inducing a radial flow and flattening the axial velocity distribution, which enhances and weakens the mixing, respectively. In the straight tube section connecting the T-junction and coiled tube, the latter may dominate and cause the mixing to deteriorate. An experiment was performed with the Villermaux/Dushman method to verify the simulation results. Based on a mixing performance simulation with various fluid and geometric structure parameters, a dimensionless correlation was obtained that can be used to determine the mixing intensity along the coiled tube with a deviation of less than 1.5%. These results provide guidance for designing a coiled tube or optimizing the operating conditions to meet the mixing requirements of specific chemical processes.

Key words: Mixing, T-junction, Simulation, Coiled tube, Correlation, Flow

Shan Zhu, Kai Wang, Yangcheng Lü. Effects on the mixing process of a coiled tube after a T-junction: Simulation and correlation[J]. Chinese Journal of Chemical Engineering, 2018, 26(12): 2441-2447.

Shan Zhu, Kai Wang, Yangcheng Lü. Effects on the mixing process of a coiled tube after a T-junction: Simulation and correlation[J]. Chin.J.Chem.Eng., 2018, 26(12): 2441-2447.

参考文献

[1] F. Jiang, K.S. Drese, S. Hardt, M. Kupper, F. Schonfeld, Helical flows and chaotic mixing in curved micro channels, AICHE J. 50(2004) 2297-2305.

[2] S. Vashisth, V. Kumar, K.D.P. Nigam, A review on the potential applications of curved geometries in process industry, Ind. Eng. Chem. Res. 47(2008) 3291-3337.

[3] A. Akbarinia, A. Behzadmehr, Numerical study of laminar mixed convection of a nanofluid in horizontal curved tubes, Appl. Therm. Eng. 27(2007) 1327-1337.

[4] R. Mote, S.D. Probert, D. Nevrala, Free-convective flows within a hot-water store, induced by a submerged, relatively cold heat exchanger, Appl. Energy 39(1991) 207.

[5] L. Liu, L. Li, Z. Ding, Z. Yang, Mass transfer enhancement in coiled hollow fiber membrane module, J. Membr. Sci. 264(2005) 113-121.

[6] M.M. Mandal, P. Aggarwal, K.D.P. Nigam, Liquid-liquid mixing in coiled flow inverter, Ind. Eng. Chem. Res. (23) (2011) 13230-13235.

[7] P. Naphon, S. Wongwises, A review of flow and heat transfer characteristics in curved tubes, Renew. Sust. Energ. Rev. 10(5) (2006) 463-490.

[8] F. Schonfeld, V. Hessel, C. Hofmann, An optimised split-and-recombine micro-mixer with uniform ‘chaotic’ mixing, Lab Chip 4(2004) 65-69.

[9] J. Aubin, D.F. Fletcher, J. Bertrand, C. Xuereb, Characterization of the mixing quality in micromixers, Chem. Eng. Technol. 26(2003) 1262-1270.

[10] J. Aubin, M. Ferrando, V. Jiricny, Current methods for characterising mixing and flow in microchannels, Chem. Eng. Sci. 65(2010) 2065-2093.

[11] Z.D. Liu, Y.C. Lu, J.W. Wang, G.S. Luo, Mixing characterization and scaling-up analysis of asymmetrical T-shaped micromixer:Experiment and CFD simulation, Chem. Eng. J. 181(2012) 597-606.

[12] P. Guichardon, L. Falk, Characterisation of micromixing efficiency by the iodide-iodate reaction system. Part I:Experimental procedure, Chem. Eng. Sci. 55(2000) 4233-4243.

[13] P. Guichardon, L. Falk, J. Villermaux, Characterisation of micromixing efficiency by the iodide-iodate reaction system. Part Ⅱ:Kinetic study, Chem. Eng. Sci. 55(2000) 4245-4253.

[14] R.Q. Duan, S.Y. Jiang, Numerical investigation of gas flow distribution and thermal mixing in helically coiled tube bundle, J. Nucl. Sci. Technol. 45(2008) 704-711.

[15] D. Gobby, P. Angeli, A. Gavriilidis, Mixing characteristics of T-type microfluidic mixers, J. Micromech. Microeng. 11(2001) 126-132.

[16] S.H. Wong, M. Ward, C. Wharton, Micro T-mixer as a rapid mixing micromixer, Sens. Actuators B 100(2004) 359-379.

[17] N. Kockmann, T. Kiefer, M. Engler, P. Woias, Convective mixing and chemical reactions in microchannels with high flow rates, Sens. Actuators B 117(2006) 495-508.

[18] A. Alam, K.Y. Kim, Analysis of mixing in a curved microchannel with rectangular grooves, Chem. Eng. J. 181(2012) 708-716.

[19] S.P. Vanka, G. Luo, C.M. Winkler, Numerical study of scalar mixing in curved channels at low Reynolds numbers, AICHE J. 50(2004) 2359-2368.

[20] R.K.T. Corney, J. Peakall, D.R. Parsons, L. Elliott, K.J. Amos, J.L. Best, G.M. Keevil, D.B. Ingham, The orientation of helical flow in curved channels, Sedimentology 53(2006) 249-257.

[21] L.C. Truesdell, R.J. Adler, Numerical treatment of fully developed laminar flow in helically coiled tubes, AICHE J. 16(1970) 1010-1015.

[22] K.A. Saxena, D.P.K. Nigam, Coiled configuration for flow inversion and its effect on residence time distribution, AICHE J. 30(1984) 363-368.

[23] I. Conte, X.F. Peng, B.X. Wang, Numerical investigation of forced fluid flow and heat transfer from conically coiled pipes, Numer. Heat Transfer Part A 53(2008) 945-965.

[24] D.I. Piazza, M. Ciofalo, Numerical prediction of turbulent flow and heat transfer in helically coiled pipes, Int. J. Therm. Sci. 49(2010) 653-663.

[25] F. Schonfeld, S. Hardt, Simulation of helical flows in microchannels, AICHE J. 50(2004) 771-778.

[26] V. Kumar, M. Aggarwal, K.D.P. Nigam, Mixing in curved tubes, Chem. Eng. Sci. 61(2006) 5742-5753.

[27] Y.C. Lu, S. Zhu, K. Wang, G.S. Luo, Simulation of the mixing process in a straight tube with sudden changed cross-section, Chin. J. Chem. Eng. 24(6) (2016) 711-718.

[28] S.A. Berger, L. Talbot, L.S. Yao, Flow in curved pipes, Annu. Rev. Fluid Mech. 15(1) (1983) 461-512.

[29] R.K. Shah, S. Kakac, W. Aung, Convective heat transfer in curved ducts, Handbook of Single-Phase Convective Heat Transfer, Wiley & Sons, 1987, p. 58.

[30] K. Nandakumar, J.H. Masliyah, Swirling flow and heat transfer in coiled and twisted pipes, Adv. Transp. Process. 4(1986) 49-112.

[31] W.R. Dean, Notes on the motion of fluid in a curved pipe, Dublin Philos. Mag. J. Sci. 4(20) (1927) 208-233.

[32] W.R. Dean, The stream line motion of fluid in a curved pipe, Dublin Philos. Mag. J. Sci. 5(30) (1928) 673-695.

Effects on the mixing process of a coiled tube after a T-junction: Simulation and correlation

Effects on the mixing process of a coiled tube after a T-junction: Simulation and correlation

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