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搅拌槽内三维流场的数值模拟
Numercal simulation of hydrodynamics in stirred tank

查看参考文献4篇

文摘 应用商业计算流体力学软件CFX对搅拌槽内的流场进行了模拟,并与PIV测试结果进行了比较,流型吻合良好,速度分量的对比结果表明不同情况与各种模型的吻合情况不尽相同,标准k-ε双方程模型、RNG k-ε模型和代数应力模型在主流域内都能较准确地模拟搅拌槽内的流动场。
其他语种文摘 Stirred mixing vessels are widely used in chemical industry for processes involving the mixing or/and chemical reactions of liquids, gases or solids. The ability to numerically simulate the whole flow field is vital to optimal design. Previous attempts have adopted a steady-state semi-empirical analysis requiring experimentally-based inputs of some form. In the present work, the CFD code CFX-4 is used for the full field computation for both the fluid within the impeller passages and the fluid outside. The model solves the unsteady ensemble-averaged continuity and momentum equations (Reynolds equations) with turbulence effects accounted for by k-e model, RNG k-e model, and algebraic stress model. The equations are discretised by the finite-volume approach. The mesh is divided into two parts which are fixed to their respective frames of reference, one being stationary and the other rotating with the impeller. At the interface between these two parts the rotating mesh slides over the fixed one at each time interval. The computation proceeds simultaneously over the whole flow field and the solutions in both rotating and stationery domains are coupled at all times. Comparisons between the predictions and the experimental data measured by particle imaging velocimetry (PIV) show that all the major flow patterns are well reproduced. The quantitative comparisons show encouraging agreement.
来源 化工学报 ,2003,54(5):612-618 【核心库】
关键词 搅拌槽 ; 流场测量 ; PIV ; 数值模拟 ; 湍流模型
地址

北京化工大学化学工程学院, 北京, 100029

语种 中文
文献类型 研究性论文
ISSN 0438-1157
学科 化学工业
基金 国家自然科学基金
文献收藏号 CSCD:1234197

参考文献 共 4 共1页

1.  Xu Y. CFD Predictions of Stirred Tank Flows. Trans. IChemE,1996,74(A4):471-479 被引 3    
2.  Jian S. Validation of CFD Simulations of a Stirred Tank Using Particle Image Velocimetry Data. Can. J. Chem. Eng.,1998,76:611-625 被引 3    
3.  侯栓弟. 化工学报,2000,51(1):70-76 被引 7    
4.  Ng K. Assessment of Sliding Mesh CFD Predictions and LDA Measurements of the Flow in a Tank Stirred by a Rushton Impeller. Trans. IChemE,1998,76(A6):737-747 被引 2    
引证文献 17

1 饶麒 搅拌槽内黏性流体流动的DPIV测量与CFD模拟 化工学报,2004,55(8):1374-1379
被引 10

2 王振松 固-液搅拌槽内槽底流场的CFD模拟 北京化工大学学报. 自然科学版,2005,32(4):5-9
被引 12

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