| 用大涡模拟结合改进的内外迭代法数值模拟搅拌槽中的液相流动 |
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| 引用本文： | 张艳红,杨超,毛在砂.用大涡模拟结合改进的内外迭代法数值模拟搅拌槽中的液相流动[J].中国化学工程学报,2006,14(3):321-329. |
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| 作者姓名： | 张艳红 杨超 毛在砂 |
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| 作者单位： | 中国科学院过程工程研究所;中国科学院过程工程研究所;中国科学院过程工程研究所 |
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| 基金项目： | 中国科学院资助项目，国家重点基础研究发展计划(973计划) |
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| 摘 要： | 1 INTRODUCTION Stirred tank reactors are widely encountered in the chemical, pharmaceutical, and hydrometallurgical proc- esses. The fluid motion in stirred tanks is three-dimensional, complex, and covers a wide range of spatial and temporal scales. In the area surrounding the impeller, the flow is highly turbulent and swirling. The numerical simulation of such reactor systems is helpful in quantifying the effects of the impeller type, geometry, and the operational conditions in order to …
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| 关 键 词： | 大涡 内外迭代法 数值模拟 搅拌槽 液相流动 |
| 收稿时间： | 2005-12-23 |
| 修稿时间： | 2005-12-232006-03-02 |
Large Eddy Simulation of Liquid Flow in a Stirred Tank with Im-proved Inner-Outer Iterative Algorithm |
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| ZHANGYanhong,YANGChao,MAOZaisha.Large Eddy Simulation of Liquid Flow in a Stirred Tank with Im-proved Inner-Outer Iterative Algorithm[J].Chinese Journal of Chemical Engineering,2006,14(3):321-329. |
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| Authors: | ZHANGYanhong YANGChao MAOZaisha |
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| Affiliation: | Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | In this study, the large eddy simulation technique was applied on the flow in a baffled stirred tank driven by a Rushton turbine at Re=29000. The interaction between the rotating impeller and the static baffles was accounted for by means of the improved inner-outer iterative algorithm. The sub-grid scale model was a conventional Smagorinsky model. The numerical solution of the governing equations was conducted in a cylindrical staggered grid. The momentum and the continuity equations were discretized using the finite difference method, with a third-order QUICK scheme used for convective terms. The phase-resolved predictions were compared with the experimental data of Wu and Patterson and good agreement was observed for both the mean and the turbulence quantities. They were much better than the Reynolds-averaged Navier-Stokes model including the Reynolds Stress Model for simulating the turbulence. The study also suggests the feasibility of LES in combination with the improved inner-outer iterative algorithm for the simulation of turbulent flow in stirred tanks. |
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| Keywords: | large eddy simulation stirred tank computational fluid dynamics (CFD) turbulence |
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