TURBULENT REACTING MIXING OF LIQUIDS IN A COAXIAL JET MIXER

TURBULENT REACTING MIXING OF LIQUIDS IN A COAXIAL JET MIXER
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同轴喷射混合器中液体的湍流反应混合

DOI:
10.1002/cite.201100184
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发表时间:
2012
期刊:
Proceeding of Seventh International Symposium on Turbulence and Shear Flow Phenomena
影响因子:
--
通讯作者:
Hassel
Hassel
中科院分区:
--
文献类型:
--
作者:
Walter;Kornev;Hassel

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大涡模拟用于研究高Reynolds Re和施密特Sc数下的被动和反应标量混合,以证明基于涡耗散和DQR-IEM模型的LES-SGS微观混合方法正确模拟液体反应流的能力。对受限喷射反应器中的快速中和反应进行了模拟。被动标量的平均配置文件同意与测量。结果表明,大尺度运动对标量方差的贡献最大,而小于典型惯性距离尺度的细尺度的贡献可以忽略不计。因此,现有的LES模型能够预测在大的Sc数的标量方差。反应性运输所获得的结果显示,在确定的微观混合速率和产品浓度的差异。使用嵌入全局网格的局部细化框进行了一项特殊研究来研究精细结构的动力学。精细结构的典型统计特性的数值再现。
Large eddy simulation is used to investigate passive and reactive scalar mixing at high Reynolds Re and Schmidt Sc numbers in order to prove capability of the LES‐SGS micromixing approaches based on the eddy dissipation and DQMOM‐IEM models properly simulating liquid reacting flows. Simulations were performed for a fast neutralization reaction in a confined jet reactor. The mean profiles for passive scalar agree well with measurements. It was shown that the most contribution to the scalar variance is made by large scale motions whereas the contribution of fine scales smaller than typical inertial range scales is negligible. Thus, the existing LES models are capable of predicting the scalar variance at large Sc numbers. The results obtained for reactive transport revealed discrepancies in the determination of micromixing rate and product concentration. A special study was performed to investigate the dynamics of fine structures using locally refined box embedded into global grid. Typical statistical properties of fine structures were reproduced numerically.
高施密特数下无源标量混合的几何特征。
DOI: --
发表时间: 2003
影响因子: 8.6
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