Trailing vortices around a 45° pitched-blade impeller

AIChE Journal

Volumn 44, Issue 6, 1998, Pages 1233-1246

  Schafer M ^a   Yianneskis, M ^a,b   Wachter P ^a   Durst, F ^a  

^a UNIVERSITY OF ERLANGEN NUREMBERG   (Germany)

^b KING'S COLLEGE LONDON   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

IMPELLER; MIXING; PROCESS MONITORING; STATISTICAL ANALYSIS; STIRRED REACTOR; TRAILING VORTEX; TURBULENT FLOW;

COMPUTATIONAL FLUID DYNAMICS; FLOW PATTERNS; MIXING; OPTIMIZATION; ROTORS; TURBINES; TURBOMACHINE BLADES; TURBULENCE; VORTEX FLOW;

PITCHED BLADE IMPELLERS; TRAILING VORTICES;

CHEMICAL REACTORS;

BLADE; IMPELLER; MIXER; VORTEX;

EID: 0343423142     PISSN: 00011541     EISSN: None     Source Type: Journal    
DOI: 10.1002/aic.690440602     Document Type: Article

References (29)

1. Ali, A. M., H. H. S. Yuan, D. S. Dickey, and G. B. Tatterson, "Liquid Dispersion Mechanisms in Agitated Tanks: Part I. Pitched Blade Turbine," Chem. Eng. Commun., 10, 205 (1981).
2. Armstrong, S. G., and S. Ruszkowski, "Measurement and Comparison of Flows Generated by Different Types of Impeller in a Stirred Tank," Proc. Colloq. on Mechanical Agitation, France, E.N.S.I.G.C., Toulouse, p. 1.9 (1987).
3. Distelhoff, M. F. W., J. Laker, A. J. Marquis, and J. M. Nouri, "The Application of a Strain Gauge Technique to Measurement of the Power Dissipation of Five Impellers," Exp. Fluids, 20, 56 (1995).
4. Duncan, W. J., A. S. Thom, and A. D. Young, Mechanics of Fluids, Arnold, London (1970).
5. Hockey, R. M., Turbulence Newtonian and Non-Newtonian Flows in a Stirred Reactor, PhD Thesis, Univ. of London, London (1990).
6. Hockey, R. M., and J. M. Nouri, "Turbulent Flow in a Baffled Vessel Stirred by a 60° Pitched Blade Impeller," Chem. Eng. Sci., 51 (19), 4405 (1996).
7. Höfken M., M. Schäfer, and F. Durst, "Detaillierte Untersuchung des Strömungsefeldes innerhalb eines Sechs-Blatt-Scheibenrührers," Chem. Ing. Tech., 68, 803 (1996).
8. Jaworski, Z., A. W. Nienow, E. Koutsakos, K. Dyster, and W. Bujalski, "An LDA Study of Turbulent Flow in a Baffled Vessel Agitated by a Pitched Blade Turbine," Trans. Inst. Chem. Eng., 69, Part A, 313 (1991).
9. Kresta, S. M., and P. E. Wood, "The Mean Flow Field Produced by a 45° Pitched Blade Turbine: Changes in the Circulation Pattern Due to Off Bottom Clearance," Can. J. Chem. Eng., 71, 42 (1993a).
10. Kresta, S. M., and P. E. Wood, "The Flow Field Produced by a Pitched Blade Turbine: Characterisation of the Turbulence and Estimation of the Dissipation Rate," Chem. Eng. Sci., 48, 1761 (1993b).
11. Lee, K. C., K. Ng, M. Yianneskis, F. Lange, and R. Sanatian, "Sliding Mesh Predictions of the Flows Around Rushton Impellers," Inst. Chem. Eng. Symp. Ser., 140, 47 (1996).
12. Nouri, J. M., and J. H. Whitelaw, "Flow Characteristics of Stirred Reactors with Newtonian and Non-Newtonian Fluids," AIChE J., 36, 627 (1990a).
13. Nouri, J. M., and J. H. Whitelaw, "Effect of Size and Confinement on the Flow Characteristics in Stirred Reactors," Proc. Int. Symp. on Application of Laser Techniques to Fluid Mechanics, Lisbon, Portugal, p. 23.2.1 (1990b).
14. Ranade, V. V., and J. B. Joshi, "Flow Generated by Pitched Blade Turbines I: Measurements Using Laser Doppler Anemometer," Chem. Eng. Commun., 81, 197 (1989).
15. Rao, K. S., V. B. Rewatkar, and J. B. Joshi, "Critical Impeller Speed for Solid Suspension in Mechanically Agitated Contactors," AIChE J., 34, 1332 (1988).
16. Rutherford, K., K. C. Lee, S. M. S. Mahmoudi, and M. Yianneskis, "Hydrodynamic Characteristics of Dual Rushton Impeller Stirred Vessels," AIChE J., 42(2), 332 (1996a).
17. Rutherford K., K. C. Lee, S. M. S. Mahmoudi, and M. Yianneskis, "The Influence of Rushton Impeller Blade and Disk Thickness on the Mixing Characteristics of Stirred Vessels," Trans. Inst. Chem. Eng., Part A, 74, 369 (1996b).
18. Schäfer, M., M. Höfken, and F. Durst, "Detailed LDV Measurements for Visualization of the Flow Field Within a Stirred Tank Reactor Equipped with a Rushton Turbine," Trans. Inst. Chem. Eng., Part A, 75, 279 (1997).
19. Sheu, Y.-H. E., T. P. K. Chang, G. B. Tatterson, and D. S. Dickey, "A Three-Dimensional Measurement Technique for Turbulent Flows," Chem. Eng. Commun., 17, 67 (1982).
20. Stoots, C. M., and R. V. Calabrese, "The Mean Velocity Field Relative to a Rushton Turbine Blade," AIChE J., 41(1), 1 (1995).
21. Tatterson, G. B., and T. G. Stanford, "Liquid Dispersion Mechanisms in Agitated Tanks: III. Low Viscosity Discrete Phase into High Viscosity Continuous Phase," Chem. Eng. Commun., 6, 371 (1981).
22. Tatterson, G. B., H.-H. S. Yuan, and R. S. Brodkey, "Stereoscopic Visualization of the Flows for Pitched Blade Turbines," Chem. Eng. Sci., 35, 1369 (1980).
23. Tay, M., and G. B. Tatterson, "Form and Skin Drag Contributions to Power Consumption for the Pitched-Blade Turbine," AIChE J., 31(11), 1915 (1985).
24. Van't Riet, K., and J. M. Smith, "The Trailing Vortex System Produced by Rushton Turbine Agitators," Chem. Eng. Sci., 30, 1093 (1975).
25. Van't Riet, K., W. Bruijn, and J. M. Smith, "Real and Pseudo-Turbulence in the Discharge Stream from a Rushton Turbine," Chem. Eng. Sci., 31, 407 (1976).
26. Wu, H., and G. K. Patterson, "Laser-Doppler Measurements of Turbulent-Flow Parameters in a Stirred Mixer," Chem. Eng. Sci., 44(10), 2207 (1989).
27. Yianneskis, M., and J. H. Whitelaw, "On the Structure of the Trailing Vortices Around Rushton Turbine Blades," Trans. Inst. Chem. Eng., Part A, 17, 543 (1993).
28. Yianneskis, M., Z. Popiolek, and J. H. Whitelaw, "An Experimental Study of the Steady and Unsteady Flow Characteristics of Stirred Reactors," J. Fluid Mech., 175, 537 (1987).
29. Zwietering, T. N., "Suspending of Solid Particles in Liquid by Agitators," Chem. Eng. Sci., 8, 244 (1958).