Gaussian distributions of rotational velocities in a granular medium
Malte Schmick and Mario Markus
We investigate experimentally a homogeneously driven granular medium. It consists of spheres, each one containing a magnetic dipole, rolling on a horizontally placed dish and subject to a magnetic field which is sinusoidal in time and spatially homogeneous. A gaslike state is obtained. Except for ex ... [Phys. Rev. E 78, 010302 (2008)] published Wed Jul 23, 2008.
Existence and Vanishing of the Breathing Mode in Strongly Correlated Finite Systems
C. Henning, K. Fujioka, P. Ludwig, A. Piel, A. Melzer et al.
One of the fundamental eigenmodes of finite interacting systems is the mode of uniform radial expansion and contractionthe breathing mode (BM). Here we show in a general way that this mode exists only under special conditions: (i) for harmonically trapped systems with interaction potentials of the f ... [Phys. Rev. Lett. 101, 045002 (2008)] published Tue Jul 22, 2008.
Avalanche dynamics on a rough inclined plane
Tamas Borzsonyi, Thomas C. Halsey, and Robert E. Ecke
The avalanche behavior of gravitationally forced granular layers on a rough inclined plane is investigated experimentally for different materials and for a variety of grain shapes ranging from spherical beads to highly anisotropic particles with dendritic shape. We measure the front velocity, area, ... [Phys. Rev. E 78, 011306 (2008)] published Mon Jul 21, 2008.
Birth and growth of a granular jet
John R. Royer, Eric I. Corwin, Bryan Conyers, Andrew Flior, Mark L. Rivers et al.
The interaction between fine grains and the surrounding interstitial gas in a granular bed can lead to qualitatively new phenomena not captured in a simple, single-fluid model of granular flows. This is demonstrated by the granular jet formed by the impact of a solid sphere into a bed of loose, fine ... [Phys. Rev. E 78, 011305 (2008)] published Fri Jul 18, 2008.
Approximate analytical solutions in a model for highly concentrated granular-fluid flows
Diego Berzi and James T. Jenkins
We extend a simple two-phase model for a steady fully developed flow of particles and water over an erodible inclined bed to situations in which the water and particles do not have the same depth. The rheology of the particles is based on recent numerical simulations and physical experiments, the rh ... [Phys. Rev. E 78, 011304 (2008)] published Thu Jul 17, 2008.