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
Publikováno v:
EPJ Web of Conferences, Vol 140, p 04002 (2017)
Buoyancy-driven (thermal) convection in dilute granular media, fluidized by a vibrating base, is known to appear without the need of lateral boundaries in a restricted region of parameters (inelasticity, gravity, intensity of energy injection). We ha
Externí odkaz:
https://doaj.org/article/4c1bd1eed8e049c08513265c83e1ec86
Autor:
Romi Roberto, Boccolini Daniela, Vallorani Roberto, Severini Francesco, Toma Luciano, Cocchi Maurizio, Tamburro Angelo, Messeri Gianni, Crisci Antonio, Angeli Luca, Costantini Roberto, Raffaelli Irene, Pontuale Giorgio, Thiéry Isabelle, Landier Annie, Le Goff Gilbert, Fausto Anna, Di Luca Marco
Publikováno v:
Malaria Journal, Vol 11, Iss 1, p 98 (2012)
Abstract
Externí odkaz:
https://doaj.org/article/c638b03bd144448da666c88c6ca4d644
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