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首页> 外文期刊>Chemical and Process Engineering Research >COMPARISON OF LARGE EDDY SIMULATIONS AND k-ε MODELLING OF FLUID VELOCITY AND TRACER CONCENTRATION IN IMPINGING JET MIXERS
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COMPARISON OF LARGE EDDY SIMULATIONS AND k-ε MODELLING OF FLUID VELOCITY AND TRACER CONCENTRATION IN IMPINGING JET MIXERS

机译：射流混合机大涡模拟与流体速度和示踪剂浓度的k-ε建模比较

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摘要

Simulations of turbulent mixing in two types of jet mixers were carried out using two CFD models, large eddy simulation and k-ε model. Modelling approaches were compared with experimental data obtained by the application of particle image velocimetry and planar laser-induced fluorescence methods. Measured local microstructures of fluid velocity and inert tracer concentration can be used for direct validation of numerical simulations. Presented results show that for higher tested values of jet Reynolds number both models are in good agreement with the experiments. Differences between models were observed for lower Reynolds numbers when the effects of large scale inhomogeneity are important.
机译：使用两种CFD模型（大涡模拟和k-ε模型）对两种类型的喷射混合器中的湍流混合进行了模拟。将建模方法与通过应用粒子图像测速法和平面激光诱导的荧光方法获得的实验数据进行了比较。测得的流体速度和惰性示踪剂浓度的局部微观结构可用于数值模拟的直接验证。提出的结果表明，对于更高的雷诺数射流测试值，两个模型均与实验吻合良好。当大规模不均匀性的影响很重要时，可以观察到较低雷诺数的模型之间的差异。

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