Cone cylinders measuring 25 mm in diameter and weighing 108 g were shot into dense
silica sand beds, mostly at 200 m/s, using a vertical-firing 75-mm diameter compressed-air …

Two-dimensional impact experiments by Clark et al. identified the source of inertial drag to
be caused by 'collisions' with a latent force network, leading to large fluctuations of the force …

When a raindrop hits a sand bed, it leaves behind a small crater with a mixture of liquid and
grains located at the center. This event is frequently observed in nature, but when absent …