In order to study the evolution of the size of ice crystal during its flow in horizontal straight pipes

both experiment research and numerical simulation were performed in this study. The size distribution and evolution of ice crystals for different sub-cooling degrees

flow velocities

and Ice Packing Fractions (IPF) were studied by numerical simulation using the CFD-PBM coupling model

and the numerical simulation was then verified by experiment. The results show that the distribution of ice number density could be approximately described by Gaussian distribution at the entrance of the ice slurry pipe with an IPF of 15%. With the increase in velocity and IPF

the average size of ice crystal increases along the central axis. Additionally

the size distribution of ice crystals gets more uneven along the vertical direction. With the decrease of flow velocity and the increase of IPF

the peak value of the length number density distribution of the ice crystal’s particle size increases

and the average value of the corresponding ice crystal’s particle size decreases.