This article deals with the resuspension phenomenon whereby particles adhering on a wall
surface can be re-entrained by a flowing fluid. This is an area where significant progress has …

There has been a flurry of interest over the past decade in the study of impact and
penetration into granular media. A wealth of knowledge has resulted from these efforts. This …

The impact of an object on a granular solid is an ubiquitous phenomenon in nature, the
scale of which ranges from the impact of a raindrop onto sand all the way to that of a large …

Energetic collisions of subatomic particles with fixed or moving targets have been very
valuable to penetrate into the mysteries of nature. But the mysteries are quite intriguing …

When an intruder strikes a granular material from above, the grains exert a stopping force
which decelerates and stops the intruder. Many previous studies have used a macroscopic …

We present in this Letter experimental results on the bidimensional flow field around a
cylinder penetrating into dense granular matter, together with drag force measurements. A …

We study the impact of an intruder on a dense granular material. The process of impact and
interaction between the intruder and the granular particles is modeled using discrete …

Drag friction that acts on a disk in a two-dimensional granular medium is studied at high
packing fractions. We concentrate on a high-velocity region, in which the dynamic …

From small seeds falling from trees to asteroids colliding with planets and moons, the impact
of projectiles onto granular targets occurs in nature at different scales. In this paper, we …

We study the resistance force of cylindrical objects penetrating quasi-statically into granular
media experimentally and numerically. Simulations are validated against experiments. In …