Navier–Stokes transport coefficients for a model of a confined quasi-two-dimensional granular binary mixture

Garzó, Vicente; Brito, Ricardo; Soto, Rodrigo

doi:10.1063/5.0032919

Cited by 6 publications

(3 citation statements)

References 82 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this study, the commonly used pseudo-first-order, pseudo-second-order kinetics, and intra-particle diffusion model equations were used to fit the adsorption data (Garzo et al 2021).…”

Section: Adsorption Kinetic Studiesmentioning

confidence: 99%

Magnetic Fe2O3/biochar composite prepared in a molten salt medium for antibiotic removal in water

Liang

Zhu

et al. 2022

Biochar

View full text Add to dashboard Cite

The large-scale use of antibiotics is causing serious water pollution problems, and it is of great significance to develop new technologies to remove antibiotics from water. As an environmentally friendly and economical adsorption material, carbon derived from biomass is a low-cost and feasible material for removing antibiotics in sewage, but the current removal efficiencies are not high enough for large-scale practical application. In this study, poplar wood chips are used as raw material, and a magnetic biochar is prepared by co-pyrolysis of poplar wood chips and FeCl3/CaCl2 mixed molten salt. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), N2-isothermal adsorption and desorption, X-ray photoelectron spectroscopy (XPS) and scanning electron microscope (SEM) techniques showed the successful synthesis of Fe2O3/bioC composite. In-situ formed Fe2O3 makes the biochar possess the characteristic of superparamagnetic, which is conducive to the recycling of biochar. Due to the etching effect of the molten salts, rough surface was formed on Fe2O3/bioC, resulting in a maximum norfloxacin (NOR) adsorption ability up to 38.77 mg g−1 at pH 6.0. The NOR adsorption behavior on Fe2O3/bioC followed the pseudo second order kinetic model and the equilibrium data was best fitted the Langmuir model. In addition, the adsorption process of NOR on Fe2O3/bioC was thermodynamically spontaneous. The results show that this low-cost and reusable magnetic biochar has the potential for rapid and efficient removal of antibiotic from aqueous solution.

show abstract

“…In this study, the commonly used pseudo-first-order, pseudo-second-order kinetics, and intra-particle diffusion model equations were used to fit the adsorption data (Garzo et al 2021).…”

Section: Adsorption Kinetic Studiesmentioning

confidence: 99%

Magnetic Fe2O3/biochar composite prepared in a molten salt medium for antibiotic removal in water

Liang

Zhu

et al. 2022

Biochar

View full text Add to dashboard Cite

show abstract

“…This is the expected result for dilute granular mixtures [ 50 , 51 , 52 ]. However,

in binary granular suspensions at low-density [ 120 , 121 ] and confined quasi-two-dimensional dilute granular mixtures [ 122 ].…”

Section: First-order Contributions To the Partial Temperatures: Influ...mentioning

confidence: 99%

Kinetic Theory of Polydisperse Granular Mixtures: Influence of the Partial Temperatures on Transport Properties—A Review

Chamorro

González

Garzó

2022

Entropy

Self Cite

View full text Add to dashboard Cite

It is well-recognized that granular media under rapid flow conditions can be modeled as a gas of hard spheres with inelastic collisions. At moderate densities, a fundamental basis for the determination of the granular hydrodynamics is provided by the Enskog kinetic equation conveniently adapted to account for inelastic collisions. A surprising result (compared to its molecular gas counterpart) for granular mixtures is the failure of the energy equipartition, even in homogeneous states. This means that the partial temperatures Ti (measuring the mean kinetic energy of each species) are different to the (total) granular temperature T. The goal of this paper is to provide an overview on the effect of different partial temperatures on the transport properties of the mixture. Our analysis addresses first the impact of energy nonequipartition on transport which is only due to the inelastic character of collisions. This effect (which is absent for elastic collisions) is shown to be significant in important problems in granular mixtures such as thermal diffusion segregation. Then, an independent source of energy nonequipartition due to the existence of a divergence of the flow velocity is studied. This effect (which was already analyzed in several pioneering works on dense hard-sphere molecular mixtures) affects to the bulk viscosity coefficient. Analytical (approximate) results are compared against Monte Carlo and molecular dynamics simulations, showing the reliability of kinetic theory for describing granular flows.

show abstract

“…The collisional model we use in our simulations represents the athermal/non-equilibrium extension of the one considered in [28]. It has been shown to embody dissipative and forcing mechanisms of experimental systems where spherical grains are placed on vertically vibrating horizontal substrates [40][41][42]. In these systems, energy is injected along the vertical direction through grainsubstrate collisions and then transferred to the horizontal ones through grain-grain collisions with an efficiency that depends on the impact kinematics.…”

mentioning

confidence: 99%

Quasi-crystalline order in vibrated granular matter

Foffi

Plati²,

Raphael

et al. 2023

Preprint

View full text Add to dashboard Cite

Quasi-crystals are aperiodic structures that present crystallographic properties which are not compatible with that of a single unit cell. Their revolutionary discovery in a metallic alloy, less than three decades ago, has required a full reconsideration of what we defined as a crystal structure. Surprisingly, quasi-crystalline structures have been discovered also at much larger length scales in different microscopic systems for which the size of elementary building blocks ranges between the nanometric to the micrometric scale. Here, we report the first experimental observation of spontaneous quasi-crystal self-assembly at the millimetric scale. This result is obtained in a fully athermal system of macroscopic spherical grains vibrated on a substrate. Starting from a liquid-like disordered phase, the grains begin to locally arrange into three types of squared and triangular tiles that eventually align, forming 8-fold symmetric quasi-crystal that has been predicted in simulation but not yet observed experimentally in non-atomic systems. These results are not only the proof of a novel route to spontaneously assemble quasi-crystals but are of fundamental interest for the connection between equilibrium and non-equilibrium statistical physics.

show abstract

Navier–Stokes transport coefficients for a model of a confined quasi-two-dimensional granular binary mixture

Cited by 6 publications

References 82 publications

Magnetic Fe2O3/biochar composite prepared in a molten salt medium for antibiotic removal in water

Magnetic Fe2O3/biochar composite prepared in a molten salt medium for antibiotic removal in water

Kinetic Theory of Polydisperse Granular Mixtures: Influence of the Partial Temperatures on Transport Properties—A Review

Quasi-crystalline order in vibrated granular matter

Contact Info

Product

Resources

About