Now showing items 1-20 of 38

  • 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 two-dimensional 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 ...
  • Exact predictions from Edwards ensemble vs realistic simulations of tapped narrow two dimensional granular columns 

    Irastorza, Ramiro; Carlevaro, Manuel; Pugnaloni, Luis (Journal of Statistical Mechanics: Theory and Experiment, 2013)
    We simulate, via a discrete element method, the tapping of a narrow column of disks under gravity. For frictionless disks, this system has a simple analytical expression for the density of states in the Edwards volume ...
  • 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 two-dimensional granular packings in different states of mechanical equilibrium obtained by tapping. We show that topological descriptors of the contact network allow one 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 ...
  • 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, ...
  • 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, ...
  • 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 ...
  • 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 ...
  • Integrando temas de química, física y matemáticas a través de TIC 

    Urruspuru, Juan; Chong, Carlos; Juanto, Susana; Baade, Nieves (Jornadas de Enseñanza de las Ciencias de la Naturaleza, 2014-08-21)
    Nuestro grupo IEC (FRLP, UTN) adquirió, a través del Promei, sistemas de adquisición de datos y el software relacionado(programa LoggerPro, marca Vernier), y realizó la implementación exitosa de algunas experiencias : en ...
  • Estrategias didácticas en un laboratorio integrador de física y química 

    Juanto, Susana; Iasi, Rodolfo; Urruspuru, Juan; Baade, Nieves; Zerbino, Lia (JEIN, 2014-09-04)
    Dado que tanto en Física como en Química se realizan laboratorios de calorimetría, se decidió realizar una integración entre ambas Cátedras. Debido a que los alumnos pueden estar cursando ambas materias al mismo tiempo o ...
  • Mostración áulica usando TICs, empuje hidrostático 

    Montero, Maria Fernanda; Devece, Eugenio; Del Zotto, Ruben; Attilio, Gabriel; Zerbino, Lia (JEIN, 2014-09-04)
    En las clases tradicionales de Física existen temas que son de difícil incorporación por parte del alumno si solo se desarrolla el contenido de manera teórica. Este trabajo apunta a reforzar ese tipo de problemáticas, en ...
  • 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 steady-state packing fraction ϕ and force moment tensor Σ of quasi-two-dimensional granular columns subjected to tapping. Systems of different height h and width L are considered. We find that ϕ and Σ, ...
  • 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 Wang-Landau algorithm to sample with equal probabilities the static configurations of a model granular system. The "non-interacting rigid arch model" used is based on the description of static configurations ...
  • 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 two-dimensional 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. ...
  • 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 ...
  • 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 “faster-is-slower” (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 ...
  • Arch based configurations in the volume ensemble of static granular systems 

    Slobinsky, D.; Pugnaloni, Luis (Journal of Statistical Mechanics: Theory and Experiment, 2015)
    We propose an alternative approach to count the microscopic static configurations of granular packs under gravity by considering arches. This strategy obviates the problem of filtering out configurations that are not ...
  • Química, ensayando evaluación formativa en entornos virtuales de aprendizaje 

    Djirikian, Damián; Lopez, Carlos; Chong, Carlos; Juanto, Susana (Reunión de educadores en la química, 2015-08-12)
    Proponemos el uso de entornos informáticos, al ser conscientes que estos entornos proporcionan medios para crear un EVA (Entorno Virtual de Aprendizaje), facilitan el acceso a la información, la comunicación y la libertad ...
  • Los modelos atómicos, analogías y análogos concretos 

    Pastorino, Silvia; Djirikian, Damián; Juanto, Susana (Jornadas nacionales y jornadas internacionales de enseñanza de la química universitaria, superior, secundaria y técnica, 2015-10-06)
    Comprender los modelos atómicos y sus implicancias es un tema fundamental en Química, muchas veces opacado por el hecho que los alumnos no poseen suficientes conocimientos previos de electricidad y magnetismo, no sólo en ...
  • Experiencia de laboratorio de gases ideales, un método para la integración de contenidos en ingeniería 

    Juanto, Susana; Pastorino, Silvia; Mardones, Lucas (Jornadas de Enseñanza e Investigación Educativa en el campo de las Ciencias Exactas y Naturales UNLP, 2015-10-28)
    En la búsqueda de optimizar la enseñanza de la química para los estudiantes de ingeniería en sistemas de información (frlp-utn), se desarrolló una experiencia de laboratorio sobre gases ideales en la cual se tiene como ...