Mixing performance experiments in impeller stirred tanks subjected to unsteady rotational speeds

Chemical Engineering Science

Volumn 53, Issue 17, 1998, Pages 3031-3040

  Yao, W G ^a   Sato, H ^a   Takahashi, K ^a   Koyama, K ^a  

^a YAMAGATA UNIVERSITY   (Japan)

Author keywords

IMRs; Laminar chaotic mixing; Mixing performance; Unsteady rotational speeds; Viscous mixing

Indexed keywords

CHAOS THEORY; ROTATIONAL FLOW; ROTORS; TANKS (CONTAINERS); UNSTEADY FLOW; VISCOSITY OF LIQUIDS;

IMPELLER STIRRED TANKS; LAMINAR CHAOTIC MIXING; VISCOUS PERFORMANCE;

MIXING;

IMPELLER; LAMINAR FLOW; MIXING; PERFORMANCE ASSESSMENT; ROTATION;

EID: 0032483594     PISSN: 00092509     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0009-2509(98)00116-X     Document Type: Article

References (21)

1. Aref H., Balachandar S. Chaotic advection in a Stokes flow. Phys. Fluids. 29:1986;3515-3521.
2. Chien W. L., Rising H., Ottino J. M. Laminar mixing and chaotic mixing in several cavity flows. J. Fluid Mech. 170:1986;355-377.
3. Desonza A., Pike R. W. Fluid dynamics and flow patterns in stirred tanks with a turbine impeller. Can. J. Chem. Engng. 50:1972;15-23.
4. Franjione J. G., Leong C. W., Ottino J. M. Symmetries within chaos. a route to effective mixing Phys. Fluids. A1:1989;1772-1783.
5. Dong L., Johansen S. T., Engh T. A. Flow induced by an impeller in an unbaffled tank - I. Experimental. Chem. Engng Sci. 49:1994;549-560.
6. Khakhar D. V., Franjione J. G., Ottino J. M. A case study of chaotic mixing in deterministic flows. the partitioned pipe mixer Chem. Engng Sci. 42:1987;2909-2926.
7. Kuncewicz C. Three-dimensional model of laminar liquid flow for paddle impellers and flat-blade turbines. Chem. Engng Sci. 47:1992;3959-3967.
8. Lamberto D. J.et al. Using time-dependent rpm to enhance mixing in stirred vessels. Chem. Engng Sci. 51:1996;733-741.
9. Leong C. W., Ottino J. M. Experiments on mixing due to chaotic advection in a cavity. J. Fluid Mech. 209:1989;463-499.
10. Liu M., Muzzio F., Peskin R. L. Quantization of mixing in aperiodic chaotic flows. Chaos. Solitions. Fractals. 4:1994;869.
11. Metzner A. B., Taylore J. S. Flow patterns in agitated vessels. A.I.Ch.E. J. 6:1960;109-114.
12. Ogawa K., Kuroda, Chiaki, Mizumori H. Effect of unsteady agitation by reversing revolution of an impeller in an agitated vessel with aeration. Kagaku Kogaku Ronbunsyu. 22:1996;91-97.
13. Ottino J. M. The Kinematics of Mixing. Stretching, Chaos, and Transport:1989;Cambridge University Press, Cambridge.
14. Ottino J. M. Unity and diversity in mixing. stretching, diffusion, breakup, and aggregation in chaotic flow Phys. Fluids A. 5:1991;1417-1430.
15. Perng, C. Y. and Murthy, J. Y. (1993) A moving-deforming-mesh technique for simulation of flow in mixing tanks. In Process Mixing: Chemical and Biochemical Applications - Part II, eds by G. B. Tatterson, R. V. Calabrese and Penney, W. R., A.I.Ch.E. Symp. Series.
16. Shinbrot T., Ottino J. M. Geometric method to create coherent structures in chaotic flows. Phys. Rev. Lett. 71:1993;843-846.
17. Spragg, A. J. P., Maskell, S. J. and Patrick, M. A. (1985) Mixing and flow in a spinning disc blender. Proceedings of the 5th Europeans Conference Mixing, Wurzburg, Germany; 10-12 June, pp. 507-514.
18. Stone H. A., Nadim A., Strogatz S. H. Chaotic streamlines inside drops immersed in steady Stokes flows. J. Fluids Mech. 232:1991;629-646.
19. Tanaka, M. (1996) Control of polymer particles size in a suspension polymerization reactor by operation condition. In Summer Seminar of Mixing Special Study Organization of Institute. of Chemical Engineering Japan Aug. 5-6, Yonezawa, Japan 5-10.
20. Tanaka M., Tanaka H., Kimura I., Saita N. Effect of stepwise and continuous reduction in impeller speed on particle size distributions in suspension polymerization of styrene. Kagaku Kogaku Ronbunshu. 21:1995;118-125.
21. Yianneskis M., Popiolek Z., Whitelaw J. H. An experimental study of the steady and unsteady flow characteristics of stirred reactors. J. Fluid Mech. 175:1987;537-555.