The reversible elementary reaction mechanism of six components and seven steps of H2/O2 are applied by using a CFD-DSMC coupling iteration method to study the impact of boundary on flow, heat transfer and chemical reaction in a microtube. The microtube consists of a converging section and a straight section, which represents the gap on the contact surface of the pellets in porous media. It shows that after coupling, with the designed conditions in this paper, the influence of wall temperature is more obvious than that of wall slip velocity on the coupling results from the analysis of chemical reaction, yet the velocity field in the boundary layer is more affected by the wall slip velocity. In addition, the velocity in the central region of the flow decreases while the concentration of reaction products increases after coupling, due to the increasing of the velocity in the boundary layer and the influence of wall temperature, respectively. By the coupling of CFD-DSMC methods, more details and influence of the boundary can be considered, and the computational efficiency is higher than that of the single microscopic method.

中文翻译：

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CFD-DSMC耦合方法在微尺度气体流动与燃烧中的应用

H的六组分七步可逆基本反应机理2/O2应用CFD-DSMC耦合迭代法研究边界对微管内流动、传热和化学反应的影响。微管由会聚部分和直线部分组成，它代表多孔介质中颗粒接触表面上的间隙。从化学反应分析可知，耦合后，在本文设计条件下，壁面温度对耦合结果的影响比壁面滑移速度的影响更明显，但边界层内的速度场受到的影响更大。由壁面滑移速度。此外，由于边界层中速度的增加和壁温的影响，耦合后流动中心区域的速度降低，而反应产物的浓度增加，分别。通过CFD-DSMC方法的耦合，可以考虑更多的细节和边界的影响，计算效率高于单一的微观方法。