In order to study the effect of abrasive grain size on abrasive flow polishing,common rail pipe was selected as the research object.By calculation the state of abrasive grain flow under different grain sizes,the discrete phase analysis of the flow field was carried out from the dynamic pressure,the velocity field,the abrasive grain trajectory and the turbulent kinetic energy.From the numerical analysis shows that,with the increase in the grain size,the dynamic pressure,the velocity and the turbulent kinetic...