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Volumn 62, Issue 6, 2007, Pages 1619-1635

Prediction of strongly swirling flow within an axial hydrocyclone using two commercial CFD codes

Author keywords

CFD; Design; Fluid mechanics; Modelling; Simulation; Swirling flow

Indexed keywords

COMPUTATIONAL FLUID DYNAMICS; DIFFUSION; MATHEMATICAL MODELS; REYNOLDS NUMBER; SWIRLING FLOW; TURBULENT FLOW;

EID: 33846846212     PISSN: 00092509     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.ces.2005.10.031     Document Type: Article
Times cited : (47)

References (83)
  • 1
    • 33846796824 scopus 로고    scopus 로고
    • AEA Technology, 1997. CFX-4.2 Solver Manual. AEA Technology, Didcot.
  • 3
    • 0016361862 scopus 로고    scopus 로고
    • Baker, D.W., Sayre Jr., C.L., 1971. Decay of swirling turbulent flow of incompressible fluids in long pipes. In: Stoll, H.W. (Ed.), Flow Its Measurement and Control in Science and Industry, Proceedings of the ASME Fluids Engineering Conference, vol. 1. Instrument Society of America, Pittsburgh, pp. 301-312.
  • 4
    • 0032052335 scopus 로고    scopus 로고
    • Modelling of heat transfer and fluid flow for decaying swirl flow in a circular pipe
    • Bali T. Modelling of heat transfer and fluid flow for decaying swirl flow in a circular pipe. International Communications in Heat and Mass Transfer 25 (1998) 349-358
    • (1998) International Communications in Heat and Mass Transfer , vol.25 , pp. 349-358
    • Bali, T.1
  • 5
    • 85056118272 scopus 로고    scopus 로고
    • Bell, E.R.G., Skilbeck, F., Stirling, A.K., Meldrum, N., 1988. Process in motion: experience with oil/water separation on the Hutton TLP. In: Proceedings of the 1988 Annual Offshore Technology Conference, Houston, vol. 4, pp. 281-289.
  • 6
    • 38849094986 scopus 로고
    • Observations of oscillatory motion in certain swirling flows
    • Chanaud R.C. Observations of oscillatory motion in certain swirling flows. Journal of Fluid Mechanics 21 (1965) 111-127
    • (1965) Journal of Fluid Mechanics , vol.21 , pp. 111-127
    • Chanaud, R.C.1
  • 7
    • 0027558976 scopus 로고
    • Development of a hybrid k-ε turbulence model for swirling recirculating flows under moderate to strong swirl intensities
    • Chang K.-C., and Chen C.-S. Development of a hybrid k-ε turbulence model for swirling recirculating flows under moderate to strong swirl intensities. International Journal for Numerical Methods in Fluids 16 (1993) 421-443
    • (1993) International Journal for Numerical Methods in Fluids , vol.16 , pp. 421-443
    • Chang, K.-C.1    Chen, C.-S.2
  • 8
    • 0028519396 scopus 로고
    • Turbulent flow field in tangentially injected swirl flows in tubes
    • Chang F., and Dhir V.K. Turbulent flow field in tangentially injected swirl flows in tubes. International Journal of Heat and Fluid Flow 15 (1994) 346-356
    • (1994) International Journal of Heat and Fluid Flow , vol.15 , pp. 346-356
    • Chang, F.1    Dhir, V.K.2
  • 9
    • 0026119080 scopus 로고
    • Downstream boundary effects on the spectral characteristics of a swirling flowfield
    • Chao Y.C., Leu J.H., and Hung Y.F. Downstream boundary effects on the spectral characteristics of a swirling flowfield. Experiments in Fluids 10 (1991) 341-348
    • (1991) Experiments in Fluids , vol.10 , pp. 341-348
    • Chao, Y.C.1    Leu, J.H.2    Hung, Y.F.3
  • 11
    • 33846801922 scopus 로고
    • Modification of the k-ε turbulence model for swirling recirculating flow in a pipe expansion
    • Chen C.-S., and Chang K.-C. Modification of the k-ε turbulence model for swirling recirculating flow in a pipe expansion. Computational Fluid Dynamics 5 (1995) 263-279
    • (1995) Computational Fluid Dynamics , vol.5 , pp. 263-279
    • Chen, C.-S.1    Chang, K.-C.2
  • 13
    • 0035838110 scopus 로고    scopus 로고
    • The return to isotropy of homogeneous turbulence
    • Choi K.-S., and Lumley J.L. The return to isotropy of homogeneous turbulence. Journal of Fluid Mechanics 436 (2001) 59-84
    • (2001) Journal of Fluid Mechanics , vol.436 , pp. 59-84
    • Choi, K.-S.1    Lumley, J.L.2
  • 16
    • 2442685696 scopus 로고    scopus 로고
    • New understanding of a hydrocyclone flow field and separation mechanism from computational fluid dynamics
    • Cullivan J.C., Williams R.A., Dyakowski T., and Cross C.R. New understanding of a hydrocyclone flow field and separation mechanism from computational fluid dynamics. Minerals Engineering 17 (2004) 651-660
    • (2004) Minerals Engineering , vol.17 , pp. 651-660
    • Cullivan, J.C.1    Williams, R.A.2    Dyakowski, T.3    Cross, C.R.4
  • 17
    • 36849100388 scopus 로고
    • Transport equations in turbulence
    • Daly B.J., and Harlow F.H. Transport equations in turbulence. Physics of Fluids 13 (1971) 2634-2649
    • (1971) Physics of Fluids , vol.13 , pp. 2634-2649
    • Daly, B.J.1    Harlow, F.H.2
  • 18
    • 0027556455 scopus 로고
    • Perspective: systematic study of Reynolds stress closure models in the computations of plane channel flows
    • Demuren A.O., and Sarkar S. Perspective: systematic study of Reynolds stress closure models in the computations of plane channel flows. Journal of Fluids Engineering 15 (1993) 5-12
    • (1993) Journal of Fluids Engineering , vol.15 , pp. 5-12
    • Demuren, A.O.1    Sarkar, S.2
  • 19
    • 33846782169 scopus 로고    scopus 로고
    • Dirkzwager, M., 1996. A new axial cyclone design for fluid-fluid separation. Ph.D. Thesis, Delft University of Technology, The Netherlands.
  • 20
    • 0021412675 scopus 로고
    • Enhancements of the SIMPLE method for predicting incompressible fluid flows
    • van Doormaal J.P., and Raithby G.D. Enhancements of the SIMPLE method for predicting incompressible fluid flows. Numerical Heat Transfer 7 (1984) 147-163
    • (1984) Numerical Heat Transfer , vol.7 , pp. 147-163
    • van Doormaal, J.P.1    Raithby, G.D.2
  • 22
    • 33846827816 scopus 로고    scopus 로고
    • Fluent, (2002). Fluent v6.0.12 online help.
  • 23
    • 0017898071 scopus 로고
    • Ground effects on pressure fluctuations in the atmospheric boundary layer
    • Gibson M.M., and Launder B.E. Ground effects on pressure fluctuations in the atmospheric boundary layer. Journal of Fluid Mechanics 86 (1978) 491-511
    • (1978) Journal of Fluid Mechanics , vol.86 , pp. 491-511
    • Gibson, M.M.1    Launder, B.E.2
  • 24
    • 85040282108 scopus 로고    scopus 로고
    • Gostelow, J.P., 1984. Cascade Aerodynamics. Pergamon Press, Oxford, p. 12.
  • 27
    • 33846814374 scopus 로고    scopus 로고
    • Hanjalić, K., 2000. Personal communication.
  • 28
    • 84993929132 scopus 로고
    • A Reynolds stress model of turbulence and its application to thin shear flows
    • Hanjalić K., and Launder B.E. A Reynolds stress model of turbulence and its application to thin shear flows. Journal of Fluid Mechanics 52 (1972) 609-638
    • (1972) Journal of Fluid Mechanics , vol.52 , pp. 609-638
    • Hanjalić, K.1    Launder, B.E.2
  • 29
    • 0033166325 scopus 로고    scopus 로고
    • An experimental and numerical study of turbulent swirling flow in gas cyclones
    • Hoekstra A.J., Derksen J.J., and van den Akker H.E.A. An experimental and numerical study of turbulent swirling flow in gas cyclones. Chemical Engineering Science 54 (1999) 2055-2065
    • (1999) Chemical Engineering Science , vol.54 , pp. 2055-2065
    • Hoekstra, A.J.1    Derksen, J.J.2    van den Akker, H.E.A.3
  • 30
    • 0024301187 scopus 로고
    • Computation of highly swirling confined flow with a Reynolds stress turbulence model
    • Hogg S., and Leschziner M.A. Computation of highly swirling confined flow with a Reynolds stress turbulence model. AIAA Journal 27 (1989) 57-63
    • (1989) AIAA Journal , vol.27 , pp. 57-63
    • Hogg, S.1    Leschziner, M.A.2
  • 31
    • 0030292045 scopus 로고    scopus 로고
    • Application of a reflection-free DSM to turbulent flow and heat transfer in a square-sectioned U-bend
    • Iacovides H., Launder B.E., and Li H.-Y. Application of a reflection-free DSM to turbulent flow and heat transfer in a square-sectioned U-bend. Experimental Thermal and Fluid Science 13 (1996) 419-429
    • (1996) Experimental Thermal and Fluid Science , vol.13 , pp. 419-429
    • Iacovides, H.1    Launder, B.E.2    Li, H.-Y.3
  • 33
    • 0024735704 scopus 로고
    • Calculation of confined swirling flows with a second moment closure
    • Jones W.P., and Pascau A. Calculation of confined swirling flows with a second moment closure. Journal of Fluids Engineering 111 (1989) 248-255
    • (1989) Journal of Fluids Engineering , vol.111 , pp. 248-255
    • Jones, W.P.1    Pascau, A.2
  • 34
    • 33846798914 scopus 로고    scopus 로고
    • Kegge, S.J., 2000. Numerical simulation of an axial hydrocyclone. M.Sc. Thesis, Mechanical Engineering Department, Delft University of Technology, The Netherlands.
  • 35
    • 0026140269 scopus 로고
    • Experimental study of turbulent swirling flow in a straight pipe
    • Kitoh O. Experimental study of turbulent swirling flow in a straight pipe. Journal of Fluid Mechanics 225 (1991) 445-479
    • (1991) Journal of Fluid Mechanics , vol.225 , pp. 445-479
    • Kitoh, O.1
  • 36
    • 0023164716 scopus 로고
    • Modified k-ε model for turbulent swirling flow in a straight pipe
    • Kobayashi T., and Yoda M. Modified k-ε model for turbulent swirling flow in a straight pipe. JSME International Journal 30 (1987) 66-71
    • (1987) JSME International Journal , vol.30 , pp. 66-71
    • Kobayashi, T.1    Yoda, M.2
  • 39
    • 0024713967 scopus 로고
    • Second-moment closure and its use in modelling turbulent industrial flows
    • Launder B.E. Second-moment closure and its use in modelling turbulent industrial flows. International Journal for Numerical Methods in Fluids 9 (1989) 963-985
    • (1989) International Journal for Numerical Methods in Fluids , vol.9 , pp. 963-985
    • Launder, B.E.1
  • 41
    • 0016497477 scopus 로고
    • Progress in the development of a Reynolds-stress turbulence closure
    • Launder B.E., Reece G.J., and Rodi W. Progress in the development of a Reynolds-stress turbulence closure. Journal of Fluid Mechanics 68 (1975) 537-566
    • (1975) Journal of Fluid Mechanics , vol.68 , pp. 537-566
    • Launder, B.E.1    Reece, G.J.2    Rodi, W.3
  • 42
    • 0018480361 scopus 로고
    • A stable and accurate convective modelling procedure based on quadratic upstream interpolation
    • Leonard B.P. A stable and accurate convective modelling procedure based on quadratic upstream interpolation. Computer Methods in Applied Mechanics and Engineering 19 (1979) 59-98
    • (1979) Computer Methods in Applied Mechanics and Engineering , vol.19 , pp. 59-98
    • Leonard, B.P.1
  • 44
    • 33846827815 scopus 로고    scopus 로고
    • The computation of turbulent engineering flows with turbulence-transport closures
    • Peyret R., and Krause E. (Eds), Springer, Vienna
    • Leschziner M.A. The computation of turbulent engineering flows with turbulence-transport closures. In: Peyret R., and Krause E. (Eds). Advanced Turbulent Flow Computations (2000), Springer, Vienna 209-277
    • (2000) Advanced Turbulent Flow Computations , pp. 209-277
    • Leschziner, M.A.1
  • 45
    • 0028448845 scopus 로고
    • Characteristics of swirling flow in a circular pipe
    • Li H., and Tomita Y. Characteristics of swirling flow in a circular pipe. Journal of Fluids Engineering 116 (1994) 370-373
    • (1994) Journal of Fluids Engineering , vol.116 , pp. 370-373
    • Li, H.1    Tomita, Y.2
  • 46
    • 0028534389 scopus 로고
    • Assessment of turbulence-transport models including non-linear RNG eddy-viscosity formulation and second-moment closure for flow over a backward facing step
    • Lien F.S., and Leschziner M.A. Assessment of turbulence-transport models including non-linear RNG eddy-viscosity formulation and second-moment closure for flow over a backward facing step. Computers and Fluids 23 (1994) 983-1004
    • (1994) Computers and Fluids , vol.23 , pp. 983-1004
    • Lien, F.S.1    Leschziner, M.A.2
  • 47
    • 0017519161 scopus 로고
    • Swirl flows in combustion: a review
    • Lilley D.G. Swirl flows in combustion: a review. AIAA Journal 15 (1977) 1063-1078
    • (1977) AIAA Journal , vol.15 , pp. 1063-1078
    • Lilley, D.G.1
  • 48
    • 33846801923 scopus 로고    scopus 로고
    • Lin, C.H., Lin, C.A., Chen, J.C., 1996. Modelling influences of inlet swirl profiles on dump combustor flows. AIAA-96-0568.
  • 49
    • 0037455060 scopus 로고    scopus 로고
    • A new second-moment closure approach for turbulent swirling confined flows
    • Lu P., and Semião V. A new second-moment closure approach for turbulent swirling confined flows. International Journal for Numerical Methods in Fluids 41 (2003) 133-150
    • (2003) International Journal for Numerical Methods in Fluids , vol.41 , pp. 133-150
    • Lu, P.1    Semião, V.2
  • 50
    • 10644243725 scopus 로고    scopus 로고
    • Application of advanced turbulence models to complex industrial flows
    • Tzabiras G. (Ed), WIT Press, Southampton
    • Menter F.R., and Grotjans H. Application of advanced turbulence models to complex industrial flows. In: Tzabiras G. (Ed). Calculation of Complex Turbulent Flows (2000), WIT Press, Southampton 167-207
    • (2000) Calculation of Complex Turbulent Flows , pp. 167-207
    • Menter, F.R.1    Grotjans, H.2
  • 51
    • 33846782168 scopus 로고    scopus 로고
    • Moene, A.F., 2003. Swirling pipe flow with axial strain. Experiment and large eddy simulation. Ph.D. Thesis, Eindhoven University of Technology, The Netherlands.
  • 52
    • 6044234156 scopus 로고
    • The return of strongly anisotropic turbulence to isotropy
    • Nakauchi N., and Oshima H. The return of strongly anisotropic turbulence to isotropy. Physics of Fluids 30 (1987) 3653-3660
    • (1987) Physics of Fluids , vol.30 , pp. 3653-3660
    • Nakauchi, N.1    Oshima, H.2
  • 53
    • 0014895312 scopus 로고
    • Interactions between the components of the turbulent velocity correlation tensor due to pressure fluctuations
    • Naot D., Shavit A., and Wolfshtein M. Interactions between the components of the turbulent velocity correlation tensor due to pressure fluctuations. Israel Journal of Technology 8 (1970) 259-269
    • (1970) Israel Journal of Technology , vol.8 , pp. 259-269
    • Naot, D.1    Shavit, A.2    Wolfshtein, M.3
  • 55
    • 0028992046 scopus 로고
    • Numerical analysis of swirling nonreacting and reacting flows by the Reynolds stress differential method
    • Ohtsuka M. Numerical analysis of swirling nonreacting and reacting flows by the Reynolds stress differential method. International Journal of Heat and Mass Transfer 38 (1995) 331-337
    • (1995) International Journal of Heat and Mass Transfer , vol.38 , pp. 331-337
    • Ohtsuka, M.1
  • 56
    • 0032042845 scopus 로고    scopus 로고
    • A performance comparison of the standard k-ε model and a differential Reynolds stress model for a backward-facing step
    • Parameswaran S., and Jayantha S. A performance comparison of the standard k-ε model and a differential Reynolds stress model for a backward-facing step. Numerical Heat Transfer B 33 (1998) 323-337
    • (1998) Numerical Heat Transfer B , vol.33 , pp. 323-337
    • Parameswaran, S.1    Jayantha, S.2
  • 57
    • 33846815948 scopus 로고    scopus 로고
    • Parchen, R., Steenbergen, W., Voskamp, J., 1993. A study of swirling flows in long straight pipes. In: Rodi, W., Martelli, F. (Eds.), Engineering Turbulence Modelling and Experiments, vol. 2, Proceedings of the Second International Symposium on Engineering Turbulence Modelling and Measurements, Elsevier, Amsterdam, pp. 207-216.
  • 59
    • 85057089620 scopus 로고    scopus 로고
    • Rice, C.L., 1985. Effects of motion on design of process facilities for floating production systems. In: Proceedings of the 17th Annual Offshore Technology Conference, vol. 4, Houston, USA, pp. 119-125.
  • 60
    • 0348222157 scopus 로고    scopus 로고
    • Three-dimensional laser-Doppler velocimeter measurements in swirling turbulent pipe flow
    • Rocklage-Marliani G., Schmidts M., and Ram V.I.V. Three-dimensional laser-Doppler velocimeter measurements in swirling turbulent pipe flow. Flow, Turbulence and Combustion 70 (2003) 43-67
    • (2003) Flow, Turbulence and Combustion , vol.70 , pp. 43-67
    • Rocklage-Marliani, G.1    Schmidts, M.2    Ram, V.I.V.3
  • 61
    • 0344829282 scopus 로고
    • Statistische Theorie nichthomogener Turbulenz
    • Rotta J.C. Statistische Theorie nichthomogener Turbulenz. Zeitschrift für Physik 129 (1951) 547-572
    • (1951) Zeitschrift für Physik , vol.129 , pp. 547-572
    • Rotta, J.C.1
  • 62
    • 0028082560 scopus 로고
    • Term-by-term tests of stress-transport turbulence models in a three-dimensional boundary layer
    • Schwarz W.R., and Bradshaw P. Term-by-term tests of stress-transport turbulence models in a three-dimensional boundary layer. Physics of Fluids 6 (1994) 986-998
    • (1994) Physics of Fluids , vol.6 , pp. 986-998
    • Schwarz, W.R.1    Bradshaw, P.2
  • 63
    • 0010394048 scopus 로고
    • Swirl flow in long pipes with different roughness
    • Senoo Y., and Nagata T. Swirl flow in long pipes with different roughness. Bulletin of the JSME 15 (1972) 1514-1521
    • (1972) Bulletin of the JSME , vol.15 , pp. 1514-1521
    • Senoo, Y.1    Nagata, T.2
  • 64
    • 0028992288 scopus 로고
    • Evaluation of the performance of three turbulence closure models in the prediction of confined swirling flows
    • Sharif M.A.R., and Wong Y.K.E. Evaluation of the performance of three turbulence closure models in the prediction of confined swirling flows. Computers and Fluids 24 (1995) 81-100
    • (1995) Computers and Fluids , vol.24 , pp. 81-100
    • Sharif, M.A.R.1    Wong, Y.K.E.2
  • 66
    • 0012705067 scopus 로고    scopus 로고
    • Low-Reynolds-number second-moment closure without wall-reflection redistribution terms
    • Shima N. Low-Reynolds-number second-moment closure without wall-reflection redistribution terms. International Journal of Heat and Fluid Flow 19 (1998) 549-555
    • (1998) International Journal of Heat and Fluid Flow , vol.19 , pp. 549-555
    • Shima, N.1
  • 68
    • 0037247561 scopus 로고    scopus 로고
    • Experimental fluid dynamic characterization of a cyclone chamber
    • Solero G., and Coghe A. Experimental fluid dynamic characterization of a cyclone chamber. Experimental Thermal and Fluid Science 27 (2002) 87-96
    • (2002) Experimental Thermal and Fluid Science , vol.27 , pp. 87-96
    • Solero, G.1    Coghe, A.2
  • 69
    • 0001155075 scopus 로고    scopus 로고
    • A numerical study of vortex breakdown in turbulent swirling flows
    • Spall R.E., and Ashby B.M. A numerical study of vortex breakdown in turbulent swirling flows. Journal of Fluids Engineering 122 (2000) 179-183
    • (2000) Journal of Fluids Engineering , vol.122 , pp. 179-183
    • Spall, R.E.1    Ashby, B.M.2
  • 70
    • 0026170053 scopus 로고
    • Modelling the pressure-strain correlation of turbulence: an invariant dynamical systems approach
    • Speziale C.G., Sarkar S., and Gatski T.B. Modelling the pressure-strain correlation of turbulence: an invariant dynamical systems approach. Journal of Fluid Mechanics 227 (1991) 245-272
    • (1991) Journal of Fluid Mechanics , vol.227 , pp. 245-272
    • Speziale, C.G.1    Sarkar, S.2    Gatski, T.B.3
  • 71
    • 0012446666 scopus 로고    scopus 로고
    • Predicting turbulence and heat transfer in 3-D curved ducts by near-wall second moment closures
    • Suga K. Predicting turbulence and heat transfer in 3-D curved ducts by near-wall second moment closures. International Journal of Heat and Mass Transfer 46 (2003) 161-173
    • (2003) International Journal of Heat and Mass Transfer , vol.46 , pp. 161-173
    • Suga, K.1
  • 74
    • 2642559913 scopus 로고    scopus 로고
    • Separator design must reflect varying motions of FPSOs
    • Waintraub L. Separator design must reflect varying motions of FPSOs. Offshore 56 (1996) 90
    • (1996) Offshore , vol.56 , pp. 90
    • Waintraub, L.1
  • 75
    • 0034215015 scopus 로고    scopus 로고
    • Damping characteristics of baffles for suppression of marine motion effects in primary separators
    • Waldie B., and White G. Damping characteristics of baffles for suppression of marine motion effects in primary separators. Chemical Engineering Research and Design 78A (2000) 698-706
    • (2000) Chemical Engineering Research and Design , vol.78 A , pp. 698-706
    • Waldie, B.1    White, G.2
  • 76
    • 0026634522 scopus 로고
    • Combustion accelerated swirling flows in high confinements
    • Weber R., and Dugué J. Combustion accelerated swirling flows in high confinements. Progress in Energy and Combustion Science 18 (1992) 349-367
    • (1992) Progress in Energy and Combustion Science , vol.18 , pp. 349-367
    • Weber, R.1    Dugué, J.2
  • 77
    • 33846808283 scopus 로고    scopus 로고
    • Wennerberg, D., Obi, S., 1993. Prediction of strongly swirling flows in quarl expansions with a non-orthogonal finite-volume method and a second moment turbulence closure. In: Rodi, W., Martelli, F. (Eds.), Engineering Turbulence Modelling and Experiments, vol. 2, Proceedings of the Second International Symposium on Engineering Turbulence Modelling and Measurements. Elsevier, Amsterdam, pp. 197-206.
  • 78
    • 33846786001 scopus 로고    scopus 로고
    • White, F.M., 1999. Fluid Mechanics, Fourth ed., McGraw-Hill Book Co., Singapore, p. 794.
  • 82
    • 0035425309 scopus 로고    scopus 로고
    • Variational approach to a turbulent swirling pipe flow with the aid of helicity
    • Yoshizawa A., Yokoi N., Nisizima S., Itoh S.-I., and Itoh K. Variational approach to a turbulent swirling pipe flow with the aid of helicity. Physics of Fluids 13 (2001) 2309-2319
    • (2001) Physics of Fluids , vol.13 , pp. 2309-2319
    • Yoshizawa, A.1    Yokoi, N.2    Nisizima, S.3    Itoh, S.-I.4    Itoh, K.5
  • 83
    • 0032458763 scopus 로고    scopus 로고
    • Turbulent rotating flow calculations: an assessment of two-equation anisotropic and Reynolds stress models
    • Yuan S.P., and So R.M. Turbulent rotating flow calculations: an assessment of two-equation anisotropic and Reynolds stress models. Proceedings of the Institution of Mechanical Engineers 12G (1998) 193-212
    • (1998) Proceedings of the Institution of Mechanical Engineers , vol.12 G , pp. 193-212
    • Yuan, S.P.1    So, R.M.2


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