There Are No Communists in Cuba

Renzo, Frankie Di

doi:10.22215/etd/2019-13763

Cited by 33 publications

(71 citation statements)

References 26 publications

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“…where Y is the Young modulus and ν in the Poisson ratio. This holds for contacts between same material but it is possible to generalize to the case of two species [35,38,39]. Direct formulas for γ n and γ t are lacking but it is a common strategy to choose them verifying a posteriori the good agreement with the experimental data [40].…”

Section: Details Of the Simulationmentioning

confidence: 99%

Dynamical Collective Memory in Fluidized Granular Materials

et al. 2019

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Recent experiments with rotational diffusion of a probe in a vibrated granular media revealed a rich scenario, ranging from the dilute gas to the dense liquid with cage effects and an unexpected superdiffusive behavior at large times. Here we setup a simulation that reproduces quantitatively the experimental observations and allows us to investigate the properties of the host granular medium, a task not feasible in the experiment. We discover a persistent collective rotational mode which emerges at high density and low granular temperature: a macroscopic fraction of the medium slowly rotates, randomly switching direction after very long times. Such a rotational mode of the host medium is the origin of probe's superdiffusion. Collective motion is accompanied by a kind of dynamical heterogeneity at intermediate times (in the cage stage) followed by a strong reduction of fluctuations at late times, when superdiffusion sets in.

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Section: Details Of the Simulationmentioning

confidence: 99%

Dynamical Collective Memory in Fluidized Granular Materials

et al. 2019

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“…The parameters used in the simulation are listed in Table 2, where the parameters are taken from literatures and the material databases. [30][31][32][35][36][37][38][39][40][41] Small shear modulus are used in the simulation to reduce the simulation time, and the values have been proven to be suitable for the burdens by the previous literatures [31][32][33][34][35][36][37] and our simulation.…”

Section: Forces and Torques Symbols Equationsmentioning

confidence: 99%

Numerical Simulation of Burden and Gas Distributions Inside COREX Shaft Furnace

Kou¹,

Wang

et al. 2015

steel research int.

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Shaft furnace plays a very important role in the quantity and quality indexes of the COREX process. However, the simulation on the burden and gas distributions in COREX shaft furnace is still immature and hence needs further developed and improved. For instance, currently the geometric model is commonly used to simulate the COREX shaft furnace, but can only take into account one or two kinds of burden materials. To improve the simulation of the COREX shaft furnace, a three dimensional model of COREX shaft furnace is developed in this study. It applies the discrete element method (DEM) to a COREX‐3000 shaft furnace with the charging system whose size is the same as the actual one. The model simulates the charging process with four types of burdens together and then is used to investigate the effects of different distributor angles on the burden and gas distributions. Results show that the position of burden apex moves towards the wall and the height of burden profile decreases with the increase of distributor angle. Coke and flux roll away from the striking point, while ore segregates close to the striking point, and pellet always tends to move towards the central area. Coke and flux segregate more obviously in the wall area when the distributor angle is no larger than 10° while they segregate more in both the wall and the center areas when the angle is no smaller than 20°. The distributor angle is recommended to be no larger than 10° to control the central gas flow and be larger than 25° to prevent the peripheral gas from over developing.

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“…Most notably, the complex Lagenvin method together with gauge cooling could address full QCD in the deconfined phase [1,2]. Another method based on complexified QCD, the Lefschetz thimbles, are currently applied to QCD-inspired models with few degrees of freedom, but the method is far from being applicable to full lattice QCD [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Dual Formulation and Phase Diagram of Lattice QCD in the Strong Coupling Regime

2018

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We present the computation of invariants that arise in the strong coupling expansion of lattice QCD. These invariants are needed for Monte Carlo simulations of Lattice QCD with staggered fermions in a dual, color singlet representation. This formulation is in particular useful to tame the finite density sign problem. The gauge integrals in this limiting case β → 0 are well known, but the gauge integrals needed to study the gauge corrections are more involved. We discuss a method to evaluate such integrals. The phase boundary of lattice QCD for staggered fermions in the µB − T plane has been established in the strong coupling limit. We present numerical simulations away from the strong coupling limit, taking into account the higher order gauge corrections via plaquette occupation numbers. This allows to study the nuclear and chiral transition as a function of β.Speaker,

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There Are No Communists in Cuba

Cited by 33 publications

References 26 publications

Dynamical Collective Memory in Fluidized Granular Materials

Dynamical Collective Memory in Fluidized Granular Materials

Numerical Simulation of Burden and Gas Distributions Inside COREX Shaft Furnace

Dual Formulation and Phase Diagram of Lattice QCD in the Strong Coupling Regime

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