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Andrea Puglisi   Dr.  Research or Laboratory Scientist 
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Andrea Puglisi published an article in January 2017.
Top co-authors See all
Angelo Vulpiani

70 shared publications

Istituto dei Sistemi Complessi - Consiglio Nazionale delle Ricerche, Rome, Italy

Francisco Vega Reyes

47 shared publications

Departamento de Física and Instituto de Computación Científica Avanzada (ICCAEx), Universidad de Extremadura, 06071 Badajoz, Spain

Giorgio Pontuale

15 shared publications

Istituto dei Sistemi Complessi—CNR and Dipartimento di Fisica, Università di Roma Sapienza, Piazzale Aldo Moro 2, 00185 Rome, Italy

Vittorio Loreto

14 shared publications

ISI Foundation

Andrea Gnoli

13 shared publications

Istituto dei Sistemi Complessi—CNR and Dipartimento di Fisica, Università di Roma Sapienza, Piazzale Aldo Moro 2, 00185 Rome, Italy

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Distribution of Articles published per year 
(2009 - 2017)
Total number of journals
published in
 
7
 
Publications See all
Article 0 Reads 0 Citations Dissipative lateral walls are sufficient to trigger convection in vibrated granular gases Giorgio Pontuale, Andrea Gnoli, Francisco Vega Reyes, Andrea... Published: 01 January 2017
EPJ Web of Conferences, doi: 10.1051/epjconf/201714004002
DOI See at publisher website
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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 have recently discovered a second buoyancy-driven convection effect which occurs at any value of the parameters, provided that the impact of particles with the lateral walls is inelastic (Pontuale et al., Phys. Rev. Lett. 117, 098006 (2016)). It is understood that this novel convection effect is strictly correlated to the existence of perpendicular energy fluxes: a vertical one, induced by both bulk and wall inelasticity, and a horizontal one, induced only by dissipation at the walls. Here we first review those previous results, and then present new experimental and numerical data concerning the variations of box geometry, intensity of energy injection, number of particles and width of the box.
Article 0 Reads 2 Citations A consistent description of fluctuations requires negative temperatures Luca Cerino, Andrea Puglisi, Angelo Vulpiani Published: 10 December 2015
Journal of Statistical Mechanics: Theory and Experiment, doi: 10.1088/1742-5468/2015/12/p12002
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BOOK-CHAPTER 0 Reads 0 Citations Granular Fluids: From Everyday Life to the Lab Published: 03 September 2014
SpringerBriefs in Physics, doi: 10.1007/978-3-319-10286-3_1
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In this chapter, I introduce the basic concepts and tools useful to study granular media. A tour is offered through some of the many fascinating granular phenomena. These include hydrodynamic instabilities such as granular jets, fingering, spontaneous segregation, thermal-like convection, and the several ratchet-like phenomena where “thermal” fluctuations are somehow rectified. The analogy with active fluids is also discussed.
BOOK-CHAPTER 0 Reads 0 Citations Boltzmann Equation: A Gas of Grains Published: 03 September 2014
SpringerBriefs in Physics, doi: 10.1007/978-3-319-10286-3_2
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A simple but realistic and rich model for fluidized granular media is the gas of inelastic hard spheres. In this chapter its statistical description is reviewed. A key role is played by the assumption of Molecular-Chaos and by the Boltzmann equation. A comparison with the case of elastic hard spheres is made, pointing out the analogies and the differences. The chapter is concluded with the discussion of the protocols used for energy injection.
BOOK-CHAPTER 0 Reads 0 Citations Hydrodynamics: A Sea of Grains Published: 03 September 2014
SpringerBriefs in Physics, doi: 10.1007/978-3-319-10286-3_3
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A granular fluid with typical boundary conditions used in laboratory or in silico, will develop structures and inhomogeneities in space and time. When spatial and temporal gradients are small, slow fields such as density, flow velocity and granular temperature evolve accordingly to the equations of granular hydrodynamics. The main steps to derive and close those equations, starting from granular Boltzmann equation, are described in this chapter. The application of the method to common situations are discussed. The interesting and still debated problem of fluctuations is introduced, in the last part of the chapter.
BOOK-CHAPTER 0 Reads 0 Citations Tracer’s Diffusion: Swimming Through the Grains Published: 03 September 2014
SpringerBriefs in Physics, doi: 10.1007/978-3-319-10286-3_4
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In this chapter I consider the stochastic dynamics of an intruder in a granular fluid. Under the same assumptions used to derive the Boltzmann equation, a Master Equation for the intruder’s velocity is derived. In the limit of large intruder’s mass, the dynamics is described by an Ornstein-Uhlenbeck process. I discuss the effects of collisions’ inelasticity and of non-Gaussian properties of the surrounding gas. When the shape of the intruder breaks some spatial symmetry, part of the energy dissipated in collisions can be converted in useful work. A granular Brownian motor is then realized.