The effect of two-liquid phase rheology on drop breakage in mechanically stirred vessels

被引:16
作者
Boye, AM [1 ]
Lo, MYA [1 ]
Shamlou, PA [1 ]
机构
[1] Univ London Univ Coll, Dept Chem & Biochem Engn, London WC1E 7JE, England
基金
英国生物技术与生命科学研究理事会;
关键词
two phase; stirred vessels; rheology;
D O I
10.1080/00986449608936439
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
Experiments were carried out to determine the effect of the dispersed phase concentration, phi, on the Sauter mean drop diameter of xylene in water in a mechanically agitated vessel. In the course of the experiments, the rheology of the dispersions was also measured. It was found that the viscosity of the dispersion exhibited strong viscous non-Newtonian characteristics for dispersed phase concentrations greater than approximately 50% by volume. The increase in the apparent viscosity of the dispersion with increasing dispersed phase concentration changed the how condition in the tank from turbulent regime to transitional and laminar flow regime. The Sauter mean drop diameter measured as a function of the dispersed phase was successfully interpreted in terms of a turbulent eddy-drop breakage mechanism for phi < 50% and by a boundary layer drop breakage model for phi > 50% by volume.
引用
收藏
页码:149 / 167
页数:19
相关论文
共 44 条
[11]  
Davies J.T., 1972, TURBULENCE PHENOMENA
[13]   DROP SIZES OF EMULSIONS RELATED TO TURBULENT ENERGY-DISSIPATION RATES [J].
DAVIES, JT .
CHEMICAL ENGINEERING SCIENCE, 1985, 40 (05) :839-842
[14]   LIQUID-LIQUID INTERFACIAL-AREAS FORMED BY TURBINE IMPELLERS IN BAFFLED, CYLINDRICAL MIXING TANKS [J].
ECKERT, RE ;
MCLAUGHLIN, CM ;
RUSHTON, JH .
AICHE JOURNAL, 1985, 31 (11) :1811-1820
[15]  
GODFREY JC, 1987, ICHEME S SERIES, V108, P123
[17]   PHASE INVERSION BEHAVIOR OF WATER KEROSENE DISPERSIONS [J].
GUILINGER, TR ;
GRISLINGAS, AK ;
ERGA, O .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1988, 27 (06) :978-982
[18]   FUNDAMENTALS OF THE HYDRODYNAMIC MECHANISM OF SPLITTING IN DISPERSION PROCESSES [J].
HINZE, JO .
AICHE JOURNAL, 1955, 1 (03) :289-295
[19]   UNSTEADY-STATE LIQUID LIQUID DISPERSIONS IN AGITATED VESSELS [J].
HONG, PO ;
LEE, JM .
INDUSTRIAL & ENGINEERING CHEMISTRY PROCESS DESIGN AND DEVELOPMENT, 1983, 22 (01) :130-135
[20]   CHANGES OF THE AVERAGE DROP SIZES DURING THE INITIAL PERIOD OF LIQUID LIQUID DISPERSIONS IN AGITATED VESSELS [J].
HONG, PO ;
LEE, JM .
INDUSTRIAL & ENGINEERING CHEMISTRY PROCESS DESIGN AND DEVELOPMENT, 1985, 24 (03) :868-872