Investigation of Flow Patterns in Continuous-flow Stirred Vessels by Laser Doppler Velocimetry (original) (raw)

2008, Canadian Journal of Chemical Engineering

Abstract

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The paper investigates flow patterns in continuous-flow stirred vessels using laser Doppler velocimetry, focusing on the impacts of inlet position and mean residence time on flow dynamics within a standard vessel configuration. The study identifies flow discrepancies due to incoming liquid streams and compares continuous-flow reactor performances with traditional batch reactors. Results suggest that optimizing inlet design can enhance the operational efficiency of turbine-stirred vessels.

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References (17)

  1. Agricola G., "De Re Metallica" Book VIII (originally published in 1556), translated by H.C. Hoover and L.H. Hoover, Dover, New York, NY (1950), p. 299.
  2. Alliet M., P. Mavros, C. Xuereb and J. Bertrand, "CFD Simulation and LDV Validation of Flow Patterns in Continuous-Flow Stirred Vessels: Effect of Liquid Flow Rate and Feed Location", in "Proc 4 th Int. Symp. Mixing in Industrial Processes", ISMIP4, Toulouse, France, May 14-16, 2001, SFGP, Toulouse (2001), pp. 221-234.
  3. Aubin J., P. Mavros, D.F. Fletcher, C. Xuereb and J. Bertrand, "An LDV Study of the 3-D Velocity Fields in a Vessel Agitated by an Up-and a Down-pumping Axial Impeller", Chem. Eng. Res. Des. 79A(8), 845-856 (2001).
  4. Benet N., L. Falk, H. Muhr and E. Plasari, "Experimental Study of a Two Impinging Jet Mixing Device for Precipitation Processes", Proc 4 th Int. Symp. Industrial Crystallization, Cambridge, UK (1999).
  5. Mavros P. and J. Bertrand, "Flow Visualization in Stirred Vessels: Effect of Impeller Type on the Flow Patterns Induced", Chem. Eng. Res. Des., submitted (2002).
  6. Mavros P., H. Barrué, C. Xuereb, I. Fořt and J. Bertrand, "Effect of Axial- Flow Impeller and Feed Tube Location on Flow Patterns in Continuous-flow Stirred Tank Reactors", in "Proc. CHISA Congress", Prague, Czech Republic, Aug. 25-30 (2000).
  7. Mavros P., I. Naude, C. Xuereb and J. Bertrand, "Laser Doppler Velocimetry in Agitated Vessels. Effect of Continuous Liquid Stream on Flow Patterns", Chem. Eng. Res. Des. 75A, 763-776 (1997).
  8. Mavros P., C. Xuereb and J. Bertrand, "Determination of 3-D Flow Fields in Agitated Vessels by Laser-Doppler Velocimetry: Effect of Impeller Type and Liquid Viscosity on Liquid Flow Patterns", Chem. Eng. Res. Design 74A, 658-668 (1996).
  9. Mavros P., C. Xuereb, I. Fořt and J. Bertrand, "Investigation by Laser- Doppler Velocimetry of the Effects of Liquid Flow Rates and Feed Positions on the Flow Patterns Induced in a Stirred Tank by an Axial-Flow impeller", Chem. Eng. Sci. 57(18), 3939-3952 (2002).
  10. Mezaki R., M. Mochizuki and K. Ogawa, "Engineering Data on Mixing", Elsevier, Amsterdam, The Netherlands (2000).
  11. Mumtaz H.S. and M.J. Hounslow, "Aggregation During Precipitation from Solution: An Experimental Investigation Using Poiseuille Flow", Chem. Eng. Sci. 55, 5671-5681 (2000).
  12. Nienow A.W., "On Impeller Circulation and Mixing Effectiveness in the Turbulent-Flow Regime", Chem. Eng. Sci. 52, 2557-2565 (1997).
  13. Roustan M. and J.C. Pharamond, "Agitation et mélange", Techniques de l'Ingénieur A.10 (1988), A5900.
  14. Ruszkowski S., "A Rational Method for Measuring Blending Performance, and Comparison of Different Impeller Types", in "Proc. 8 th Europ. Conf. on Mixing", Cambridge, UK, Sept. 21-23, IChemE, Rugby, UK (1994), pp. 283-291.
  15. Stavek J., P. Vondrak, I. Fořt, J. Nyvlt and M. Sipek, "Influence of Hydrodynamic Conditions on the Controlled Double-Jet Precipitation of Silver Halides in Mechanically Agitated Systems", J. Cryst. Growth 99: 1098-1103 (1990).
  16. Tatterson G.B., "Fluid Mixing and Gas Dispersion in Agitated Tanks", McGraw-Hill, New York, NY (1991), p. 235.
  17. Manuscript received August 9, 2001; revised manuscript received April 11, 2002; accepted for publication May 9, 2002.