在重粒子轨道模型的基础上,引入了Saffman力,并考虑了粒子 固壁碰撞和粒子 粒子碰撞的影响,建立了重粒子运动方程,耦合湍流脉动的随机方程,发展了重粒子弥散的随机模型,并在湍流边界层中考察该模型.将数值计算结果与实验结果进行比较,同时考察了Saffman力和粒子碰撞对计算结果的影响. Based on the heavy particle orbit model, the Saffman force is introduced, and the effect of particle solid-wall collisions and particle-particle collisions is taken into account. The equations of heavy particle motion and stochastic equations of turbulent pulsation are established, and a stochastic model of heavy particle dispersion , And the model was investigated in the turbulent boundary layer.The numerical results were compared with the experimental results and the influence of Saffman force and particle collision on the calculation results was also investigated.