The present study investigates the reactive gas flows in T-shape microreactors by means of a 3D direct simulation Monte-Carlo method (DSMC). The reactive process is modeled by incorporating a single step irreversible exothermic reaction of gas species A and B. The energy released in each reaction is added to the system by increasing the kinetic energy of the product gas specie C. The reactive collisions are modeled by means of a momentum preserving hard sphere collision model in 3D DSMC. We analyzed several process and gas parameters to observe their extent of influence on the characteristics of the reactive flow. The T-microreactor with thermal walls showed much higher mass carrying capacity as compared to the specular walls. The reaction front, which initially for maximum reaction rate was close to the inlet of gas specie of higher mass density, moved towards the center of the inlet part of the T-channel and eventually dissolved with decreasing reaction rates. This transition was smooth in the T-channel with thermal walls, whereas, quite abrupt in case of specular walls. Moreover, in T-microreactors with thermal walls, the amount of A and B converted to C follows an exponential decrease especially in moderate to low reaction rates. Further, with a clear separation between high and low reactive regimes, a piece-wise exponential decay in concentration of C with respect to decreasing reaction rates was also observed in the T-channel with specular walls.

本研究通过3D直接模拟蒙特卡洛方法（DSMC）研究了T型微反应器中的反应气体流动。通过合并气体A和B的一步不可逆放热反应来模拟反应过程。通过增加产物气体C的动能将每个反应中释放的能量添加到系统中。 3D DSMC中保留动量的硬球碰撞模型的设计。我们分析了几个过程和气体参数，以观察它们对反应流特性的影响程度。与镜面壁相比，带有热壁的T型微反应器具有更高的质量承载能力。反应前沿最初为最大反应速率，接近质量密度较高的气体物种的入口，移向T通道入口部分的中心，最终随着反应速率的降低而溶解。这种过渡在带有热壁的T形通道中是平滑的，而在镜面壁的情况下则非常突然。此外，在带有热壁的T型微反应器中，转化为C的A和B的数量呈指数下降，特别是在中低反应速率下。此外，在高反应性方案和低反应性方案之间清楚地分开的情况下，在具有镜壁的T形通道中，还观察到了C浓度相对于降低的反应速率的分段指数衰减。在具有热壁的T型微反应器中，转化为C的A和B的数量呈指数下降，特别是在中低反应速率下。此外，在高反应性方案和低反应性方案之间清楚地分开的情况下，在具有镜面壁的T形通道中，还观察到了C浓度相对于降低的反应速率的分段指数衰减。在具有热壁的T型微反应器中，转化为C的A和B的数量呈指数下降，特别是在中低反应速率下。此外，在高反应性方案和低反应性方案之间清楚地分开的情况下，在具有镜壁的T形通道中，还观察到了C浓度相对于降低的反应速率的分段指数衰减。