2020/11/25 by Bitang Kwrung Tripura, Sonu Kumar, Tripura, Bitang Kwrung +5
Engineering · #Granular flow and fluidized beds #Soil Mechanics and Vehicle Dynamics #Sports Dynamics and Biomechanics
paper · pdf · doi:10.48550/arxiv.2011.12838
We use numerical simulation to investigate the effect an intruder's shape has\non the drag and lift forces that it experiences while moving through a granular\nmedium composed of polydisperse disks of mean diameter d. The intruder\nvelocity,v, was varied from 0.1 \√(dg) to 20 \√(dg). For frictionless\nparticles (\μ= 0.0)there is a gradual increase in drag force with increasing\nv, whereas for frictional systems (\μ= 0.1,0.5) a constant drag regime appears\nat low velocities. The drag force depends weakly on the shape of the object\nprovided that the cross-section is same. The drag force depends linearly on the\nimmersion depth, while there is very little variation in lift force with depth\nfor certain shapes. The lift experienced by the object is a strong function of\nits shape at a given velocity. Shape has an effect on the distribution of\ncontacts around the surface of the intruder which may result in a strong lift\nfor certain shapes. We also show the force profiles around the intruder\nsurface.\n