Numerical Simulation of Ice Breaking Capacity of a Rotating Body Moving Underwater Based on CFD-DEM Method
In this article,a numerical simulation research is conducted on the problem of ice breaking for the waves generated by underwater motion of a rotating body using the CFD-DEM method.The influence of the speed and depth of a rotating body on the ice breaking effect is explored,and the crack propagation law and damage degree of the ice sheet under different conditions is analyzed.The speed is dimensionless as the Froude number Fr,and the depth is dimensionless as the ratio of the depth of the rotating body to the maximum diameter of the rotating body,denoted as h.The research results show that during the process of ice breaking caused by the rotating body,the damage to the ice sheet above the middle and rear parts of the rotating body is more severe.As the cracks on the ice sheet propagate forward,new longitudinal and transverse cracks appear.After the cracks fully develop,the ice sheet presents a failure form dominated by transverse cracks.The concept of critical velocity Ccri exists,and when the velocity of the rotating body is near the critical velocity,the destruction effect of the ice sheet is better,with a corresponding velocity range of Fr=0.55～0.75.In general,the degree of damage to the ice sheet decreases as the position of the rotating body becomes further from the ice.When the value of h is greater than 3.43,the ice sheet no longer undergoes significant fragmentation.
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