Browsing FRLP  I+D+i  GRUTN  GMG  TRABAJOS DE INVESTIGACIÓN by Author "Pugnaloni, Luis"
Now showing items 117 of 17

Apparent mass during silo discharge Nonlinear effects related to filling protocols
Peralta, Juan Pablo; Aguirre, María; Geminard, Jean Christophe; Pugnaloni, Luis (Elsevier, 2017)We study the evolution of the force exerted by a granular column on the bottom surface of a silo during its discharge. Previous to the discharge, we prepare the system using different filling procedures: distributed, i.e. ... 
Arching during the segregation of two dimensional tapped granular systems Mixtures versus intruders
Uñac, Rodolfo; Benito, Jesica; Vidales, Ana María; Pugnaloni, Luis (Springer, 2014)We present numerical simulations of binary mixtures of granular disks subjected to tapping. We consider the size segregation process in terms of the arches formed by small and big particles. Although arching has been ... 
Clogging transition of many particle systems flowing through bottlenecks
Zuriguel, Iker; Parisi, Daniel; Cruz Hidalgo, Raul; Lozano, Celia; Janda, Alvaro; Gago, Paula; Peralta, Juan; Ferrer, Luis; Pugnaloni, Luis; Clement, Eric; Maza, Diego; Pagonabarraga, Ignacio; Garcimartín, Angel (Scientific Reports, 2014)When a large set of discrete bodies passes through a bottleneck, the flow may become intermittent due to the development of clogs that obstruct the constriction. Clogging is observed, for instance, in colloidal suspensions, ... 
Clogging transition of vibration driven vehicles passing through constrictions
Patterson, G.; Fierens, P.; Sangiuliano Jimka, F.; König, P.; Garcimartín, A.; Zuriguel, Iker; Pugnaloni, Luis; Parisi, D. (American Physical Society, 2017)We report experimental results on the competitive passage of elongated selfpropelled vehicles rushing through a constriction. For the chosen experimental conditions, we observe the emergence of intermittencies similar to ... 
Contact network topology in tapped granular media
Arévalo, Roberto; Pugnaloni, Luis; Zuriguel, Iker; Maza, Diego (American Physical Society, 2013)We analyze the contact network of simulated twodimensional granular packings in different states of mechanical equilibrium obtained by tapping. We show that topological descriptors of the contact network allow one to ... 
Dynamic transition in conveyor belt driven granular flow
Cordero, Jose; Pugnaloni, Luis (Elsevier, 2015)We consider the flow of disks of diameter d driven by a conveyor belt of dynamic friction coefficient μ through an aperture on a flat barrier. The flow rate presents two distinct regimes. At low belt velocities v the flow ... 
Effect of particle shape and fragmentation on the response of particle dampers
Sánchez, Martín; Carlevaro, Manuel; Pugnaloni, Luis (SAGE Publications, 2014)A particle damper (PD) is a device that can attenuate mechanical vibrations thanks to the dissipative collisions between grains contained in a cavity attached to the vibrating structure. It has been recently suggested that, ... 
Ergodic nonergodic transition in tapped granular systems; The role of persistent contacts
Gago, Paula; Maza, Diego; Pugnaloni, Luis (Papers in Physics, 2016)Static granular packs have been studied in the last three decades in the frame of a modi ed equilibrium statistical mechanics that assumes ergodicity as a basic postulate. The canonical example on which this framework is ... 
Experimental proof of faster is slower in systems of frictional particles flowing through constrictions
Pastor, Jose; Garcimartín, Angel; Gago, Paula; Peralta, Juan; Martín Gomez, Cesar; Ferrer, Luis; Maza, Diego; Parisi, Daniel; Pugnaloni, Luis; Zuriguel, Iker (American Physical Society, 2015)The “fasterisslower” (FIS) effect was first predicted by computer simulations of the egress of pedestrians through a narrow exit [D. Helbing, I. J. Farkas, and T. Vicsek, Nature (London) 407, 487 (2000)]. FIS refers to ... 
First order phase transition during displacement of amphiphilic biomacromolecules from interfaces by surfactant molecules
Ettelaie, Rammile; Dickinson, Eric; Pugnaloni, Luis (Journal of Physics: Condensed Matter, 2014)The adsorption of surfactants onto a hydrophobic interface, already laden with a fixed number of polymers, is studied using the self consistent field (SCF) calculation method of Scheutjens and Fleer. For polymers having ... 
Flow rate of polygonal grains through a bottleneck Interplay between shape and size
Goldberg, Ezequiel; Carlevaro, Manuel; Pugnaloni, Luis (Papers in Physics, 2015)We report twodimensional simulations of circular and polygonal grains passing through an aperture at the bottom of a silo. The mass flow rate for regular polygons is lower than for disks\red{,} as observed by other authors. ... 
On and off dynamics of a creeping frictional system
Blanc, Baptiste; Geminard, Jean Christophe; Pugnaloni, Luis (Springer, 2014)We report on the dynamics of a model frictional system submitted to minute external perturbations. The system consists of a chain of sliders connected through elastic springs that rest on an incline. By introducing cyclic ... 
Relevance of system size to the steady state properties of tapped granular systems
Gago, Paula; Maza, Diego; Pugnaloni, Luis (American Physical Society, 2015)We investigate the steadystate packing fraction ϕ and force moment tensor Σ of quasitwodimensional granular columns subjected to tapping. Systems of different height h and width L are considered. We find that ϕ and Σ, ... 
Structure of force networks in tapped particulate systems of disks and pentagons I Clusters and loops
Pugnaloni, Luis; Carlevaro, Manuel; Kramar, M; Mischaikow, K; Kondic, L (American Physical Society, 2016)The force network of a granular assembly, defined by the contact network and the corresponding contact forces, carries valuable information about the state of the packing. Simple analysis of these networks based on the ... 
Structure of force networks in tapped particulate systems of disks and pentagons II Persistence analysis
Kondic, L.; Kramar, M.; Pugnaloni, Luis; Carlevaro, Manuel; Mischaikow, K. (American Physical Society, 2016)In the companion paper [Pugnaloni et al., Phys. Rev. E 93, 062902 (2016)], we use classical measures based on force probability density functions (PDFs), as well as Betti numbers (quantifying the number of components, ... 
Tapped granular packings described as complex networks
Arévalo, Roberto; Pugnaloni, Luis; Maza, Diego; Zuriguel, Iker (Taylor and Francis, 2013)We characterize the structure of simulated twodimensional granular packings using con cepts from complex networks theory. The packings are generated by a simulated tapping protocol, which allows us to obtain states in ... 
Wang Landau algorithm for entropic sampling of arch based microstates in the volume ensemble of static granular packings
Slobinsky, Demian; Pugnaloni, Luis (Papers in Physics, 2015)We implement the WangLandau algorithm to sample with equal probabilities the static configurations of a model granular system. The "noninteracting rigid arch model" used is based on the description of static configurations ...