Experiments were conducted with flow rates between 1.0 m/s and 2.5 m/s

ice mass fractions between 10% and 30%

and initial particle sizes between 350 μm and 550 μm to study the effects of these parameters on the evolution of ice crystal size in ice slurry isothermal flow. The results indicated that the ice particle-size distribution of the ice slurry prepared using a supercooling method presented a lognormal distribution. Under turbulent conditions

the Sauter mean diameter at the outlet was significantly smaller than that at the inlet. This indicates that the effect of breakage on the ice particle-size distribution was more significant than that of aggregation

resulting in an increase in small ice particles and a decrease in large ice particles. Large ice particles are more likely to break into smaller particles; the effect of breakage becomes more significant with an increase in the flow rate. With an ice mass fraction of 10%

the velocity increased from 1.0 m/s to 2.5 m/s

and the Sauter mean diameter difference between the inlet and outlet (Δd32) increased from 16.1 μm to 34.6 μm. These findings have significance in the safe transportation of ice slurries.