A model for the mixing time scale of a turbulent reacting scalar
A model for the mixing time scale of a turbulent reacting scalar
复制标题
湍流反应标量的混合时标模型
DOI：
10.1063/1.1565333
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发表时间：
2001
影响因子：
4.6
通讯作者：
P. Trouillet
中科院分区：
文献类型：
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作者：
C. Cha;P. Trouillet
目前的微观混合模型在运输PDF（概率密度函数方程）建模的初始非预混，湍流反应流忽略了直接影响化学反应标量波动的耗散率。映射关闭后，反应标量混合的时间尺度在火焰面制度的模型的开发和比较与直接数值模拟的湍流反应射流。模拟结果表明，一个显着的改进，通常使用的估计取代的时间尺度的反应标量的一个保守的标量在传统的传输PDF方法。该模型可以很容易地应用到许多现有的混合子模型中使用的传输PDF建模时，反应标量的时间尺度出现明确的制定。子模型允许传输PDF方法现在包括快速和缓慢的化学制度。
Current micromixing models in transported PDF (probability density function equation) modeling of initially nonpremixed, turbulent reacting flows ignore the direct influence of chemistry on the dissipation rate of reacting scalar fluctuations. Following mapping closure, a model for the time scale of reactive scalar mixing in the flamelet regime is developed and comparisons made with direct numerical simulations of a turbulent reacting jet. The modeling results show a significant improvement over the generally used estimate of substituting the time scale of the reacting scalar by that of a conserved scalar in traditional transported PDF approaches. The model can readily be applied to many existing mixing submodels used in transported PDF modeling when the time scales of the reacting scalars appear explicitly in the formulation. The submodels allow the transported PDF approach to now encompass the fast as well as slow chemistry regimes.
T. Ichinokawa 等人：“Si (001) 表面金属岛的电迁移”Phys。
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