本文采用离散涡方法对平板混合层流动进行了数值模拟，得到了与实验完全定量符合的速度场。再用单向耦合方法模拟了混合层流场中颗粒的运动。分析了混合层流动中大尺度涡结构及Stokes数对颗粒扩散的影响。与前人工作中所采用的每个时间步一个颗粒在固定的位置进入计算域的方法不同，本文中每个时间步有多个颗粒在入口处以随机的横向位置进入计算域。因此，在不需增加太多计算量的基础上，计算域中可以包含足够多的颗粒以获得较精确的统计结果。采用本文方法得到的颗粒速度场与实验结果定量符合得很好。
The plane mixing layer flow is numerically simulated by the discrete vortexmethod. Mean velocities of fluid phase agree well with experimental measurements.By means of the one-way coupling method, the particles are tracked in the mixinglayer flow. The influence of large vortex structures and particle Stokes numberon particle dispersion is analyzed. Instead of a single particle at a determinedposition in the previous work, several particles at stochastic positions areadded into the flow field at each time step from the inlet section. Therefore,without increasing much calculation time, sufficient particles can be includedin the computational domain for a more precise statistical result. Predictionsof particle velocities also agree well with the experimental results.
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