Erosion of tubes by coal particles or coal ash impingement has caused serious problems for many pulverized coal energy conversion systems. This type of erosion has led to many experimental investigations. This paper presents the numerical results of an investigation of coal particle dynamics about a tube. The calculation of particle trajectories takes into account the eftect of turbulence using a stochastic particle dispersion model. The results from this study include the frequency of particle impact and the erosion distribution on the tube surface. Good agreement is found between the numerical method and exoerhnent.