Particle image velocimetry experiments and direct numerical simulations of solids suspension in transitional stirred tank flow

被引：34
作者：
Li, Genghong [1 ,2 ,3 ]
Li, Zhipeng [1 ,2 ]
Gao, Zhengming [1 ,2 ]
Wang, Jiawei [1 ,2 ]
Bao, Yuyun [1 ,2 ]
Derksen, J. J. [3 ]
机构：
[1] Beijing Univ Chem Technol, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, Beijing 100029, Peoples R China
[2] Beijing Univ Chem Technol, Sch Chem Engn, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China
[3] Univ Aberdeen, Sch Engn, Aberdeen AB24 3UE, Scotland
来源：
CHEMICAL ENGINEERING SCIENCE | 2018年 / 191卷
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
Solid-liquid suspension; Stirred tank; Particle image velocimetry; Refractive index matching; Lattice-Boltzmann method; ELECTRICAL-RESISTANCE TOMOGRAPHY; LIQUID SUSPENSIONS; RUSHTON TURBINE; FLUIDIZED-BEDS; RESOLVED PIV; TURBULENCE; VELOCITIES; TRACKING; REACTOR; VESSEL;
D O I：
10.1016/j.ces.2018.06.073
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Solids suspension in a stirred tank with a down-pumping pitched-blade turbine impeller has been investigated by using particle image velocimetry (PIV) experiments as well as direct numerical simulations (DNS) with a lattice-Boltzmann (LB) method. The flow regime of this solid-liquid two-phase system is transitional with the impeller-based Reynolds numbers Re = 1334. The refractive index matching (RIM) method is applied in the experiments. The overall solids volume fractions are up to 8% in the experiments as well as in the simulations. The liquid flow fields around the particles are highly resolved in both experimental and simulated cases which makes it possible to investigate solid-liquid interactions in detail. The average distributions of the solids over the tank volume as predicted by the simulations are in good agreement with the experimental results. It is shown that the presence of particles reduces the average velocities as well as the turbulent fluctuation levels of the liquid in both the experiments and simulations although the reduction in the simulations is weaker as compared to in the experiments. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码：288 / 299
页数：12
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