Zobrazeno 1 - 10
of 49
pro vyhledávání: '"Pontuale Giorgio"'
It is well known that energy dissipation and finite size can deeply affect the dynamics of granular matter, often making usual hydrodynamic approaches problematic. Here we report on the experi-mental investigation of a small model system, made of ten
Externí odkaz:
http://arxiv.org/abs/2310.19475
The way granular materials response to an applied shear stress is of the utmost relevance to both human activities and natural environment. One of the their most intriguing and less understood behavior, is the stick-instability, whose most dramatic m
Externí odkaz:
http://arxiv.org/abs/1811.02464
Publikováno v:
Phys. Rev. Lett. 117, 098006 (2016)
We consider a granular gas under the action of gravity, fluidized by a vibrating base. We show that a horizontal temperature gradient, here induced by limiting dissipative lateral walls (DLW), leads always to a granular thermal convection (DLW-TC) th
Externí odkaz:
http://arxiv.org/abs/1605.02924
We have considered the statistical distributions of the volumes of the different products exported by 148 countries. We have found that the form of these distributions is not unique but heavily depends on the level of development of the nation, as ex
Externí odkaz:
http://arxiv.org/abs/1506.03597
We introduce a model for yielding, inspired by fracture models and the failure of a sheared granular medium in which the applied shear is resisted by self-organized force chains. The force chains in the granular medium (GM) are considered as a bundle
Externí odkaz:
http://arxiv.org/abs/0911.1911
In this work we experimentally study the behavior of a freely-rotating asymmetric probe immersed in a vibrated granular medium. For a wide variety of vibration conditions the probe exhibits a steady rotation whose direction is constant with respect t
Externí odkaz:
http://arxiv.org/abs/0909.3716
Autor:
Petri, Alberto, Baldassarri, Andrea, Dalton, Fergal, Pontuale, Giorgio, Pietronero, Luciano, Zapperi, Stefano
Publikováno v:
The European Physical Journal B - Condensed Matter and Complex Systems, vol.64, n.3-4, p.531-535, 2008
We experimentally investigate the response of a sheared granular medium in a Couette geometry. The apparatus exhibits the expected stick-slip motion and we probe it in the very intermittent regime resulting from low driving. Statistical analysis of t
Externí odkaz:
http://arxiv.org/abs/0810.2944
Autor:
Dalton, Fergal, Farrelly, Francis, Petri, Alberto, Pietronero, Luciano, Pitolli, Luca, Pontuale, Giorgio
Publikováno v:
Phys. Rev. Lett. 95, 138001 (2005)
We report on experimentally observed shear stress fluctuations in both granular solid and fluid states, showing that they are non-Gaussian at low shear rates, reflecting the predominance of correlated structures (force chains) in the solidlike phase,
Externí odkaz:
http://arxiv.org/abs/cond-mat/0507600
Autor:
Baldassarri, Andrea, Dalton, Fergal, Petri, Alberto, Zapperi, Stefano, Pontuale, Giorgio, Pietronero, Luciano
We present results from a series of experiments on a granular medium sheared in a Couette geometry and show that their statistical properties can be computed in a quantitative way from the assumption that the resultant from the set of forces acting i
Externí odkaz:
http://arxiv.org/abs/cond-mat/0507533
Publikováno v:
App. Math. and Comp. 144 (2003), 61-74.
We outline an efficient method for the reconstruction of a probability density function from the knowledge of its infinite sequence of ordinary moments. The approximate density is obtained resorting to maximum entropy technique, under the constraint
Externí odkaz:
http://arxiv.org/abs/physics/0207041