On the Influence of Liquid Elasticity on Mixing in a Vessel Agitated by a Two-Bladed Impeller

[+] Author and Article Information
A. Youcefi

Maître de Conférences à l’Université des Sciences et de la Technologie d’Oran

D. Anne-Archard, H. C. Boisson, M. Sengelin

Centre National de la Recherche Scientifique, Institut de Mécanique des Fluides, U.M.R. CNRS/INPT-UPS 5502, Avenue du Professeur Camille Soula, 31400 Toulouse, France

J. Fluids Eng 119(3), 616-622 (Sep 01, 1997) (7 pages) doi:10.1115/1.2819289 History: Received July 06, 1995; Revised March 27, 1997; Online December 04, 2007


The experimental study of the velocity field and power consumption has been conducted in a mixing vessel equipped with a two-bladed impeller for a viscoelastic fluid and Newtonian and non-Newtonian inelastic fluids for comparison. The results are interpreted in the light of a numerical simulation using a finite element method for an “Oldroyd B” fluid. Both numerically and experimentally a significant influence of elasticity is found for an effective Reynolds number greater than a threshold value Re* = 5 to 7. Above this value, the power number is increased and the velocity field deeply modified. This behavior is mainly related to elasticity of the fluid.

Copyright © 1997 by The American Society of Mechanical Engineers
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