Residence Time Distribution in a Two Impinging Streams Cyclone Reactor: CFD Prediction and Experimental Validation
The quantified residence time distribution (RTD)
provides a numerical characterization of mixing in a reactor, thus
allowing the process engineer to better understand mixing
performance of the reactor.This paper discusses computational
studies to investigate flow patterns in a two impinging streams
cyclone reactor(TISCR) . Flow in the reactor was modeled with
computational fluid dynamics (CFD). Utilizing the Eulerian-
Lagrangian approach, implemented in FLUENT (V6.3.22), particle
trajectories were obtained by solving the particle force balance
equations. From simulation results obtained at different Δts, the mean
residence time (tm) and the mean square deviation (σ2) were
calculated. a good agreement can be observed between predicted and
experimental data. Simulation results indicate that the behavior of
complex reactor systems can be predicted using the CFD technique
with minimum data requirement for validation.
[1] I. Elperin, Heat and Mass Transfer in Impinging Streams, Inzh.
Fiz. Zh. 6 ,1961, pp. 62-68.
[2] S. J. Royaee, M. Sohrabi, Application of photo-impinging
streams reactor in degradation of phenol in aqueous
phase,Desalination. 253 ,2010, pp. 57-61.
[3] M. Sohrabi, B. Zareikar, Modeling of the residence time
distribution and application of the continuous two impinging
streams reactor in liquid-liquid reactions, Chem. Eng. Technol.
28 ,2005, pp. 61-66.
[4] M. Sohrabi, I. Sepahsalari, Studies on the hydrodynamic
behaviour and modeling of the residence time distribution in a
coaxial flow two impinging streams cyclone reactor, Afinidad,
2005, pp. 62, 307.
[5] Y. Kitron, A. Tamir, Performance of a coaxial gas-solid twoimpinging
streams (TIS) reactor: hydrodynamics, residence
time distribution, and drying heat transfer, Industrial and
Engineering Chemistry Research, 27,1989, pp. 1760-1767.
[6] A. Tamir, M. Grinholtz, Performance of a continuous solid-
liquid two impinging streams (TIS) reactor: dissolution of
solids, hydrodynamics, mean residence time and holdup of the
particles, Industrial and Engineering Chemistry Research, 26,
1998, pp.726-731.
[7] M. Sohrabi, M. Ahmadi Marvast, Measurement of holdup and
residence time distribution in a two impinging streams cyclone
reactor, J. Chin. Inst. Chem. Engrs, 33, 2002, pp. 167.
[8] D.L. Marchisio, A.A. Barresi, CFD simulation of mixing and
reaction: the relevance of the micro-mixing model, Chem. Eng.
Sci. 58, 2003, pp. 3579-3587.
[9] D.A. Sozzi, F. Taghipour, Computational and experimental
study of annular photo-reactor hydrodynamics, Int. J. Heat and
Fluid Flow. 27 ,2006, pp. 1043-1053.
[10] L. Hjertager, B.H. Hjertager, T. Solberg, CFD modelling of fast
chemical reactions in turbulent liquid flows, Comput. Chem.
Eng. 26 ,2002, pp. 507-515.
[11] V.V. Ranade, Computational Flow Modeling for Chemical
Reactor Engineering, Academic Press, New York. ,2002.
[12] S. Vedantam, J.B. Joshi, S.B. Koganti, CFD simulation of RTD
and mixing in the annular region of a Taylor-Couette contactor,
Ind. Eng. Chem. Res. 45 ,2006, pp. 6360-6367.
[13] E.L. Paul, V.A Atiemo Obeng, S.M. Kresta, Handbook of
Industrial Mixing: Science and Practice, (Wiley-IEEE) ,2004.
[14] B.S. Choi, B. Wan, S. Philyaw, K. Dhanasekharan, T.A. Ring,
Residence time distributions in a stirred tank: comparison of
CFD predictions with experiment, Ind. Eng. Chem. Res . 43
,2004, pp. 6548-6556.
[15] B.S. Choi, B. Wan, S. Philyaw, K. Dhanasekharan and T.A.
Ring, Residence time distributions in a stirred tank-comparison
of CFD predictions with experiment, In Proceedings of the
AIChE Annual Meeting. 2007.
[16] B. Hua , S. Amber, J. Jorge, J. Dennis and G Paul , Modeling
flow and residence time distribution in an industrial-scale
reactor with a plunging jet inlet and optional agitation, Chem.
Eng. Res. 86, 2008, PP. 1462-1476.
[17] F. Ghirelli, S. Hermansson, H. Thunman, B. Leckner, Reactor
residence time analysis with CFD, Prog. Comput. Fluid Dynam.
6 ,2006, PP. 241-247.
[18] J.C. Roy, C. Bertrand, and G.L. Palec, Numerical and
Experimental Study of Mixed and Forced Convection in a
Junction, International Journal of Heat and Mass Transfer, 37,
1994, PP. 1985-2006.
[19] S.M. Hosseinalipour, A.S. Mujumdar, Flow and Thermal
Characteristics of Steady Two Dimensional Confined Laminar
Opposing Jets: Part I. Equal Jets, International Communications
in Heat and Mass Transfer, 24, 1997a, pp. 27-38.
[20] S.M. Hosseinalipour, A.S. Mujumdar, Flow and Thermal
Characteristics of Steady Two Dimensional Confined Laminar
Opposing Jets: Part II. Unequal Jets, International
Communications in Heat and Mass Transfer, 24, (1997b, pp.
39-50).
[21] S.J. Wang, S. Devahastin, and A.S. Mujumdar, Effect of
temperature difference on flow and mixing characteristics of
laminar confined opposing jets, Applied Thermal Engineering,
26, 2006, pp.519-529 .
[22] S. Devahastin, A.S.Mujumdar, A Numerical Study of Flow and
Mixing Characteristics of Laminar Confined Impinging
Streams, Chemical Engineering Journal, 85, 2002, pp. 215-223.
[23] S.J. Wang, S.Devahastin, and A.S. Mujumdar, Effects of
Geometry and Operating Conditions on the Mixing Behavior of
an In-Line Impinging Stream Mixer, Applied Mathematical
Modelling, 25, 2005, pp. 253-269.
[24] R.J. Santos et al ,Validation of a 2D CFD Model for
Hydrodynamics- Studies in CIJ Mixers, International Journal of
Chemical Reactor Engineering ,8 (2010)A32.
[25] M. Sohrabi, S. Fathi Pirkashani, M. Sohrabi, S. Fathi
Pirkashani, Application of a tangential flow two colliding
streams cyclone reactor in solid-liquid reactions, International
Journal of Chemical Reactor Engineering. 5 ,2007, A88.
[1] I. Elperin, Heat and Mass Transfer in Impinging Streams, Inzh.
Fiz. Zh. 6 ,1961, pp. 62-68.
[2] S. J. Royaee, M. Sohrabi, Application of photo-impinging
streams reactor in degradation of phenol in aqueous
phase,Desalination. 253 ,2010, pp. 57-61.
[3] M. Sohrabi, B. Zareikar, Modeling of the residence time
distribution and application of the continuous two impinging
streams reactor in liquid-liquid reactions, Chem. Eng. Technol.
28 ,2005, pp. 61-66.
[4] M. Sohrabi, I. Sepahsalari, Studies on the hydrodynamic
behaviour and modeling of the residence time distribution in a
coaxial flow two impinging streams cyclone reactor, Afinidad,
2005, pp. 62, 307.
[5] Y. Kitron, A. Tamir, Performance of a coaxial gas-solid twoimpinging
streams (TIS) reactor: hydrodynamics, residence
time distribution, and drying heat transfer, Industrial and
Engineering Chemistry Research, 27,1989, pp. 1760-1767.
[6] A. Tamir, M. Grinholtz, Performance of a continuous solid-
liquid two impinging streams (TIS) reactor: dissolution of
solids, hydrodynamics, mean residence time and holdup of the
particles, Industrial and Engineering Chemistry Research, 26,
1998, pp.726-731.
[7] M. Sohrabi, M. Ahmadi Marvast, Measurement of holdup and
residence time distribution in a two impinging streams cyclone
reactor, J. Chin. Inst. Chem. Engrs, 33, 2002, pp. 167.
[8] D.L. Marchisio, A.A. Barresi, CFD simulation of mixing and
reaction: the relevance of the micro-mixing model, Chem. Eng.
Sci. 58, 2003, pp. 3579-3587.
[9] D.A. Sozzi, F. Taghipour, Computational and experimental
study of annular photo-reactor hydrodynamics, Int. J. Heat and
Fluid Flow. 27 ,2006, pp. 1043-1053.
[10] L. Hjertager, B.H. Hjertager, T. Solberg, CFD modelling of fast
chemical reactions in turbulent liquid flows, Comput. Chem.
Eng. 26 ,2002, pp. 507-515.
[11] V.V. Ranade, Computational Flow Modeling for Chemical
Reactor Engineering, Academic Press, New York. ,2002.
[12] S. Vedantam, J.B. Joshi, S.B. Koganti, CFD simulation of RTD
and mixing in the annular region of a Taylor-Couette contactor,
Ind. Eng. Chem. Res. 45 ,2006, pp. 6360-6367.
[13] E.L. Paul, V.A Atiemo Obeng, S.M. Kresta, Handbook of
Industrial Mixing: Science and Practice, (Wiley-IEEE) ,2004.
[14] B.S. Choi, B. Wan, S. Philyaw, K. Dhanasekharan, T.A. Ring,
Residence time distributions in a stirred tank: comparison of
CFD predictions with experiment, Ind. Eng. Chem. Res . 43
,2004, pp. 6548-6556.
[15] B.S. Choi, B. Wan, S. Philyaw, K. Dhanasekharan and T.A.
Ring, Residence time distributions in a stirred tank-comparison
of CFD predictions with experiment, In Proceedings of the
AIChE Annual Meeting. 2007.
[16] B. Hua , S. Amber, J. Jorge, J. Dennis and G Paul , Modeling
flow and residence time distribution in an industrial-scale
reactor with a plunging jet inlet and optional agitation, Chem.
Eng. Res. 86, 2008, PP. 1462-1476.
[17] F. Ghirelli, S. Hermansson, H. Thunman, B. Leckner, Reactor
residence time analysis with CFD, Prog. Comput. Fluid Dynam.
6 ,2006, PP. 241-247.
[18] J.C. Roy, C. Bertrand, and G.L. Palec, Numerical and
Experimental Study of Mixed and Forced Convection in a
Junction, International Journal of Heat and Mass Transfer, 37,
1994, PP. 1985-2006.
[19] S.M. Hosseinalipour, A.S. Mujumdar, Flow and Thermal
Characteristics of Steady Two Dimensional Confined Laminar
Opposing Jets: Part I. Equal Jets, International Communications
in Heat and Mass Transfer, 24, 1997a, pp. 27-38.
[20] S.M. Hosseinalipour, A.S. Mujumdar, Flow and Thermal
Characteristics of Steady Two Dimensional Confined Laminar
Opposing Jets: Part II. Unequal Jets, International
Communications in Heat and Mass Transfer, 24, (1997b, pp.
39-50).
[21] S.J. Wang, S. Devahastin, and A.S. Mujumdar, Effect of
temperature difference on flow and mixing characteristics of
laminar confined opposing jets, Applied Thermal Engineering,
26, 2006, pp.519-529 .
[22] S. Devahastin, A.S.Mujumdar, A Numerical Study of Flow and
Mixing Characteristics of Laminar Confined Impinging
Streams, Chemical Engineering Journal, 85, 2002, pp. 215-223.
[23] S.J. Wang, S.Devahastin, and A.S. Mujumdar, Effects of
Geometry and Operating Conditions on the Mixing Behavior of
an In-Line Impinging Stream Mixer, Applied Mathematical
Modelling, 25, 2005, pp. 253-269.
[24] R.J. Santos et al ,Validation of a 2D CFD Model for
Hydrodynamics- Studies in CIJ Mixers, International Journal of
Chemical Reactor Engineering ,8 (2010)A32.
[25] M. Sohrabi, S. Fathi Pirkashani, M. Sohrabi, S. Fathi
Pirkashani, Application of a tangential flow two colliding
streams cyclone reactor in solid-liquid reactions, International
Journal of Chemical Reactor Engineering. 5 ,2007, A88.
@article{"International Journal of Chemical, Materials and Biomolecular Sciences:57181", author = "Nahid Ghasemi and Morteza Sohrabi and Yasan Soleymani", title = "Residence Time Distribution in a Two Impinging Streams Cyclone Reactor: CFD Prediction and Experimental Validation", abstract = "The quantified residence time distribution (RTD)
provides a numerical characterization of mixing in a reactor, thus
allowing the process engineer to better understand mixing
performance of the reactor.This paper discusses computational
studies to investigate flow patterns in a two impinging streams
cyclone reactor(TISCR) . Flow in the reactor was modeled with
computational fluid dynamics (CFD). Utilizing the Eulerian-
Lagrangian approach, implemented in FLUENT (V6.3.22), particle
trajectories were obtained by solving the particle force balance
equations. From simulation results obtained at different Δts, the mean
residence time (tm) and the mean square deviation (σ2) were
calculated. a good agreement can be observed between predicted and
experimental data. Simulation results indicate that the behavior of
complex reactor systems can be predicted using the CFD technique
with minimum data requirement for validation.", keywords = "Impinging streams reactor, Residence timedistribution, CFD, Eulerian-Lagrangian approach", volume = "5", number = "7", pages = "603-6", }
