Numerical simulation of solid-liquid mixing characteristics in a stirred tank with fractal impellers

2019 ◽  
Vol 30 (10) ◽  
pp. 2126-2138 ◽  
Author(s):  
Deyin Gu ◽  
Chao Cheng ◽  
Zuohua Liu ◽  
Yundong Wang
Keyword(s):  
Numerical Simulation ◽  
Stirred Tank ◽  
Liquid Mixing ◽  
Mixing Characteristics ◽  
Solid Liquid

Modeling evaluation on solid-liquid mixing characteristics in a dislocated guide impeller stirred tank

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Deyin Gu ◽  
Fenghui Zhao ◽  
Xingmin Wang ◽  
Zuohua Liu
Keyword(s):  
Power Consumption ◽  
Solid Particle ◽  
Particle Diameter ◽  
Solid Particles ◽  
Stirred Tank ◽  
Mixing Process ◽  
Solid Holdup ◽  
Aperture Ratio ◽  
Liquid Mixing ◽  
Solid Liquid

Abstract The solid-liquid mixing characteristics in a stirred tank with pitched blade impellers, dislocated impellers, and dislocated guide impellers were investigated through using CFD simulation. The effects of impeller speed, impeller type, aperture ratio, aperture length, solid particle diameter and initial solid holdup on the homogeneity degree in the solid-liquid mixing process were investigated. As expected, the solid particle suspension quality was increased with an increase in impeller speed. The dislocated impeller could reduce the accumulation of solid particles and improve the cloud height compared with pitched blade impeller under the same power consumption. The dislocated guide impeller could enhance the solid particles suspension quality on the basis of dislocated impeller, and the optimum aperture ratio and aperture length of dislocated guide impeller were 12.25% and 7 mm, respectively, in the solid-liquid mixing process. Smaller solid particle diameter and lower initial solid holdup led to higher homogeneity degree of solid-liquid mixing system. The dislocated guide impeller could increase solid particle integrated velocity and enhance turbulent intensity of solid-liquid two-phase compared with pitched blade impeller and dislocated impeller under the same power consumption.

scholarly journals Particle-resolved PIV experiments of solid-liquid mixing in a turbulent stirred tank

AIChE Journal ◽  
2017 ◽  
Vol 64 (1) ◽  
pp. 389-402 ◽  
Author(s):  
Genghong Li ◽  
Zhengming Gao ◽  
Zhipeng Li ◽  
Jiawei Wang ◽  
J. J. Derksen
Keyword(s):  
Stirred Tank ◽  
Liquid Mixing ◽  
Solid Liquid
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