Resistance performance of a ship in brash ice channel using CFD and DEM coupling model

The brash ice channel formed with icebreaker navigation is a normal working scenario for ice-going vessels.Therefore,it is necessary to study the brash ice resistance in this condition.In this paper,CFD and DEM coupling method was adopted to investigate the resistance performance of a ship sailing in model-scaled brash ice fields,considering the collision force and friction resistance among the brash ice,the water resistance,and the hydrodynamic force of brash ice,which make up the physical scenarios of navigation in the brash ice channel.Firstly,the resistance in brash ice channel was simulated by using CFD and DEM coupling methods.Then,the numerical simulation results were compared with the experimental results in HSVA ice tank.It was shown that the error between the numerical simulation results and the test results is less than 5%,which shows the robustness of the present coupling strategy.And the movement of broken ice is consistent with the experimental phenomenon.