计算力学学报Issue(5)：634-639,651,7.DOI:10.7511/jslx201405015
搅拌槽流场特性的大涡模拟研究
Study on flow characteristics in a stirred tank by large-eddy simulation
摘要
Abstract
The gas-liquid two-phase flow equations were solved by the large eddy model to numerically simulate the flow field characteristics in a stirred tank equipped with six-bladed Rushton turbine .The free fluid surface was simulated by the VOF method .The equations were solved by the Simplec method . The complex double vortex flow structures in the stirred tank ,the trailing vortex development near the impellers’ tips and the flow velocity distribution were obtained .The comparisons of the large eddy simu-lation and RNGκ-εmodel calculated results show that the large eddy model is able to simulate the deve-lopment process of instantaneous vortex flow field ,and that the presence of the baffles destroys the flow field in the round stirred tank to improve the mixing efficiency near the blades ,and that the turbulence near the blades shows significant anisotropy ,and mean velocity shows obvious fluctuations .Thus the reliability of large eddy simulation to explore turbulence phenomena and flow structures in a stirred tank is proved .关键词
搅拌槽/数值模拟/湍流结构Key words
stirred tank/numerical simulation/turbulence structure分类
数理科学引用本文复制引用
刘玉玲,郑艳,魏文礼..搅拌槽流场特性的大涡模拟研究[J].计算力学学报,2014,(5):634-639,651,7.基金项目
国家自然科学基金（51178391）；陕西省西北旱区生态水利工程重点实验室开放基金（106-221223）；中央财政支持地方高校发展专项资金特色重点学科（106-00X101）资助项目． （）
