FLOW ANALOGY OF PSEUDOPLASTIC LIQUID IN GEOMETRICALLY SIMILAR STIRRED VESSELS BASED ON NUMERICAL-ANALYSIS

被引:33
作者
KAMINOYAMA, M [1 ]
SAITO, F [1 ]
KAMIWANO, M [1 ]
机构
[1] YOKOHAMA NATL UNIV,DEPT MAT SCI & CHEM ENGN,YOKOHAMA,KANAGAWA 240,JAPAN
关键词
Agitation; Analogy; Ellis Model; Flow; Numerical Analysis; Pseudoplastic Liquids; Scale-Up; Stirred Vessels;
D O I
10.1252/jcej.23.214
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Three-dimensional numerical analysis of flow behaviour such as velocity components, shear rate and apparent viscosity of a highly viscous pseudoplastic Ellis liquid in stirred vessels was performed. The vessels used were geometrically similar, non-baffled ones of 0.2 to 0.8 m vessel diameter each with a 6-blade turbine, a paddle and an anchor-type stirring impeller. The analogy of flow fields in model and large-scale stirred vessels was investigated by applying the concept of representative shear rate to estimate the apparent viscosity of a power-law fluid proposed by Metzner et al. and Nagata. It was found that the normalized flow profiles of a pseudoplastic liquid in the scaled-up vessels were nearly consistent with those in the model vessel within the impeller blade region, while it was quantitatively shown that the deviation between the two profiles in the outer region of the impeller expands with increasing vessel diameter. © 1990, The Society of Chemical Engineers, Japan. All rights reserved.
引用
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页码:214 / 221
页数:8
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