A New Perspective for the Mixing of Yield Stress Fluids with Anchor Impellers

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

E. Brito-De La Fuente²  P. A. Tanguy¹  F. Bertrand¹ 

[1] URPEI-Paprican Chair, Department of Chemical Engineering, Ecole Polytechnique;Department of Food and Biotechnology, Faculty of Chemistry, UNAM

关键词: Non-Newtonian Mixing;    Yield Stress Fluids;    Numerical Simulation;    Anchor Impellers;    Metzner-Otto Concept;   

DOI  :  10.1252/jcej.29.51

来源: Maruzen Company Ltd

【 摘 要 】

References(24)Cited-By(18)The mixing of yield stress fluids with an anchor impeller is investigated numerically in the laminar regime using a three-dimensional finite element method. First, it is shown that the flow behavior is strongly influenced by the level of viscoplasticity and that mixing is rather inefficient in such a case. Next, correlations of the power number versus the Reynolds number are presented for different values of the Bingham number. In particular, it is established that the Metzner-Otto concept remains valid for fluid exhibiting a yield stress and that the Metzner and Otto constant (Ks) varies slightly over a wide range of Bingham numbers (Bi ≤ 75M). Finally, the 25-year old experimental findings of Nagata are reviewed and clarified.

【 授权许可】

Unknown