Simulation of Multi-Phase Flow in Autoclaves Using a Coupled CFD-DPM Approach

被引:9
作者
Kou, Bin [1 ,2 ]
Hou, Yanqing [1 ,2 ]
Fu, Weiqin [3 ]
Yang, Ni [3 ]
Liu, Junchang [3 ]
Xie, Gang [3 ]
机构
[1] Kunming Univ Sci & Technol, Fac Met & Energy Engn, Kunming 650093, Peoples R China
[2] Kunming Univ Sci & Technol, State Key Lab Complex Nonferrous Met Resources Cle, Kunming 650093, Peoples R China
[3] Kunming Met Res Inst Co Ltd, Met & Environm Protect Dept, Kunming 650093, Peoples R China
基金
中国国家自然科学基金;
关键词
autoclave; CFD; discrete phase model (DPM); numerical simulation; LIQUID MASS-TRANSFER; GAS-LIQUID; STIRRED-TANK; NUMERICAL-SIMULATION; HYDRODYNAMICS; OXYGEN; RANS; SIZE; LES;
D O I
10.3390/pr11030890
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
In this work, a numerical simulation study on the mixing characteristics of multiphase flow in an autoclave was carried out using CFD technology. The Eulerian-Eulerian model and discrete phase model (DPM) were employed to investigate the solid holdup, critical suspension speed, nonuniformity of solid suspension, gas holdup distribution, bubble tracks, and residence time during stirring leaching in the autoclave. Experiments validate the accuracy of the numerical model, and the experimental values correspond well with the simulation results. The numerical simulation results show that the solid-liquid mixing is mainly affected by the axial flow, the best agitation speed is 400 rpm, and increasing the speed further cannot make the mixture more homogenous and buildup occurred above the autoclave. The calculated critical suspension speed is 406 rpm, which is slightly lower than that obtained from the empirical formula. The gas phase is mainly concentrated in the vortex area above the blade. When the gas phase is in a completely dispersed state (N = 300 rpm), the average residence time of the bubbles is 5.66 s.
引用
收藏
页数:17
相关论文
共 50 条
[41]   Homogeneous mixture model simulation of compressible multi-phase flows at all Mach number [J].
Yoo, Young-Lin ;
Kim, Jong-Chan ;
Sung, Hong-Gye .
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW, 2021, 143
[42]   Comparison of underground mine DPM simulation using discrete phase and continuous phase models [J].
Chang, Ping ;
Xu, Guang ;
Zhou, Fubao ;
Mullins, Benjamin ;
Abishek, S. .
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION, 2019, 127 :45-55
[43]   Simulation of snow distribution on typical roofs using coupled CFD and DEM methods [J].
Yu Z. ;
Zhao L. ;
Zhao S. ;
Zhu F. .
Jianzhu Jiegou Xuebao/Journal of Building Structures, 2017, 38 (10) :116-122
[44]   A Fourier Collocation Approach for Transit-Time Ultrasonic Flowmeter Under Multi-Phase Flow Conditions [J].
Simurda, Matej ;
Lassen, Benny ;
Duggen, Lars ;
Basse, Nils T. .
JOURNAL OF COMPUTATIONAL ACOUSTICS, 2017, 25 (04)
[45]   Effects of grain size on subaerial granular landslides and resulting impulse waves: experiment and multi-phase flow simulation [J].
Lee, Cheng-Hsien ;
Huang, Zhenhua .
LANDSLIDES, 2022, 19 (01) :137-153
[46]   Numerical Simulation and Experimental Validation of Three-dimensional Unsteady Multi-phase Flow in Flushing Process of Toilets [J].
Hu, Jianguo ;
Sun, Yousong ;
Zhang, Zhengrong .
ADVANCES IN COMPUTATIONAL MODELING AND SIMULATION, PTS 1 AND 2, 2014, 444-445 :304-+
[47]   Multi-phase flow simulation of impulsive waves generated by a sub-aerial granular landslide on an erodible slope [J].
Lee, Cheng-Hsien ;
Huang, Zhenhua .
LANDSLIDES, 2021, 18 (03) :881-895
[48]   Simulation of an aggregate dryer using coupled CFD and DEM methods [J].
Hobbs, Andrew .
INTERNATIONAL JOURNAL OF COMPUTATIONAL FLUID DYNAMICS, 2009, 23 (02) :199-207
[49]   Numerical simulation of hydrodynamics in downers using a CFD-DEM coupled approach [J].
Zhao, Yongzhi ;
Ding, Yulong ;
Wu, Changning ;
Cheng, Yi .
POWDER TECHNOLOGY, 2010, 199 (01) :2-12
[50]   A review of multi-phase and single-phase models in the numerical simulation of nanofluid flow in heat exchangers [J].
Eshgarf, Hamed ;
Nadooshan, Afshin Ahmadi ;
Raisi, Afrasiab .
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS, 2023, 146 :910-927