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Comparative study of RANS and LES simulation methods for analysis of turbulence in a tubular stirred reactor

机译：rans和LES模拟方法对管状搅拌反应器中湍流分析的比较研究

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Selecting a right simulation method is important for accurately predicting flow field in stirred reactor. The Reynolds-Averaged Navier-Stokes (RANS) approach with standard k-ε model and large eddy simulations (LES) method were both used to analyze the turbulent flow field in a tubular stirred reactor for leaching. Calculations were performed to study the effects of agitator speed and flux on the turbulent flow field. The velocity at different axial sections gained by the two methods was compared. Results showed that the eddy current, especially in the back of impellor, predicted by LES was better than that by standard k-ε model. At the same time, the average relative error of the mean residence time and the mixing time of the former reduced 5% and 13% respectively than that of the latter.
机译：选择正确的仿真方法对于精确预测搅拌反应器中的流场非常重要。具有标准K-ε模型和大涡模拟（LES）方法的Reynolds平均Navier-Stokes（RAN）方法均用于分析管状搅拌反应器中的湍流流场进行浸出。进行计算以研究搅拌速度和通量对湍流场的影响。比较了两种方法所获得的不同轴向部分的速度。结果表明，涡流，尤其是叶轮背面，LES预测的比标准K-ε模型更好。同时，平均停留时间的平均相对误差和前者的混合时间分别低于后者的5％和13％。

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