Conditional Moment Closure for Large Eddy Simulations

Conditional Moment Closure for Large Eddy Simulations
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DOI：
10.1007/s10494-005-8580-7
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发表时间：
2005-12
期刊：
Flow, Turbulence and Combustion
影响因子：
--
通讯作者：
S. Navarro-Martinez;A. Kronenburg;F. Mare
S. Navarro-Martinez;A. Kronenburg;F. Mare
中科院分区：
其他
文献类型：
--
作者：
S. Navarro-Martinez;A. Kronenburg;F. Mare

文献摘要

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提出并评价了一种基于条件矩封闭（CMC）的湍流反应流大涡模拟（LES）燃烧模型。导出的条件过滤的物种的传输方程是一致的LES制定和封闭的条件速度，条件标量耗散和周围的条件平均值的波动建模建议。标量的常规β概率密度分布与子网格通量的动态建模一起使用。该模型是通过与一个试点，湍流甲烷-空气射流扩散火焰的测量模拟比较进行验证。
A conditional moment closure (CMC) based combustion model for large-eddy simulations (LES) of turbulent reacting flow is proposed and evaluated. Transport equations for the conditionally filtered species are derived that are consistent with the LES formulation and closures are suggested for the modelling of the conditional velocity, conditional scalar dissipation and the fluctuations around the conditional mean. A conventional β-probability density distribution of the scalar is used together with dynamic modelling for the sub-grid fluxes. The model is validated by comparison of simulations with measurements of a piloted, turbulent methane-air jet diffusion flame.