F315 確率密度関数モデルによる適度に速い反応が起こる乱流場の濃度予測

概要

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The velocity composition-turbulence frequency joint probability density function (JPDF) method is used to model a scalar mixing layer with the one-step irreversible, second-order, moderately fast chemical reaction between nitric oxide (NO) and ozone (O_3). The transport equation of the joint probability density function is modeled by the simplified Langevin model (SLM), the stochastic model of turbulent frequency. In order to assess the effects of the mixing model on concentration statistics, the Euclidean minimum spanning tree (EMST) model and the simple interaction by exchange with the mean (IEM) mixing model is applied. The chemistry mechanism for a moderately fast reaction is characterized by a mixture fraction and a reaction progress variable. The predictions are compared for two different mixing models : the IEM mixing model, and the EMST mixing model.
日本流体力学会の論文
2002-07-23