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An overview of recent results pertaining to the hydrodynamic description (both Newtonian and non-Newtonian) of granular gases described by the Boltzmann equation for inelastic Maxwell models is presented. The use of this mathematical model…

软凝聚态物质 · 物理学 2011-08-30 V. Garzó , A. Santos

We introduce a lattice Boltzmann for simulating an immiscible binary fluid mixture. Our collision rules are derived from a macroscopic thermodynamic description of the fluid in a way motivated by the Cahn-Hilliard approach to…

comp-gas · 物理学 2009-10-28 Enzo Orlandini , Michael R. Swift , J. M. Yeomans

This paper is devoted to the study of the dynamics of charged particles in a weakly inhomogeneous dilute gas. More precisely, we consider the existence of unique global in time classical solutions for the Vlasov-MaxwellBoltzmann system and…

偏微分方程分析 · 数学 2012-05-08 Seok-Bae Yun

We study here the steady state attained in a granular gas of inelastic rough spheres that is subject to a spatially uniform random volume force. The stochastic force has the form of the so-called white noise and acts by adding impulse to…

软凝聚态物质 · 物理学 2015-11-05 Francisco Vega Reyes , Andrés Santos

Considering a gas of self-propelled particles with binary interactions, we derive the hydrodynamic equations governing the density and velocity fields from the microscopic dynamics, in the framework of the associated Boltzmann equation.…

统计力学 · 物理学 2009-10-09 Eric Bertin , Michel Droz , Guillaume Grégoire

We study a kinetic model for non-reactive mixtures of monatomic gases with hard-sphere cross-sections under isothermal condition. By considering a diffusive scaling of the kinetic model and using the method of moments, we formally obtain…

计算物理 · 物理学 2020-04-24 Benjamin Anwasia

We prove the so-called generalized Haff's law yielding the optimal algebraic cooling rate of the temperature of a granular gas described by the homogeneous Boltzmann equation for inelastic interactions with non constant restitution…

偏微分方程分析 · 数学 2010-07-28 Ricardo J. Alonso , Bertrand Lods

We consider collisional models for granular particles and analyze the conditions under which the restitution coefficient might be a constant. We show that these conditions are not consistent with known collision laws. From the…

统计力学 · 物理学 2007-05-23 Nikolai V. Brilliantov , Thorsten Poeschel

This paper deals with solutions of the nonlinear Boltzmann equation for spatially uniform freely cooling inelastic Maxwell models for large times and for large velocities, and the nonuniform convergence to these limits. We demonstrate how…

统计力学 · 物理学 2015-06-24 M. H. Ernst , R. Brito

We consider generalizations of kinetic granular gas models given by Boltzmann equations of Maxwell type. These type of models for non-linear elastic or inelastic interactions, have many applications in physics, dynamics of granular gases,…

数学物理 · 物理学 2009-01-27 A. V. Bobylev , C. Cercignani , I. M. Gamba

Explicit expressions for the heat and momentum fluxes are given for a low-density multicomponent mixture in a steady state with temperature and velocity gradients. The results are obtained from a formally exact solution of the Gross-Krook…

统计力学 · 物理学 2009-10-31 V. Garzo

Multicomponent quantum gases are ideal platforms to study fundamental phenomena arising from the mutual interaction between different constituents. Particularly, due to the repulsive interactions between two species, the system may exhibit…

A lattice version of the driven inelastic Maxwell gas is studied in one dimension with periodic boundary conditions. Each site $i$ of the lattice is assigned with a scalar `velocity', $v_i$. Nearest neighbors on the lattice interact, with a…

统计力学 · 物理学 2017-03-10 V. V. Prasad , Sanjib Sabhapandit , Abhishek Dhar , Onuttom Narayan

The paper studies a higher-order diffusion model of Maxwell-Stefan kind. The model is based upon higher-order moment equations of kinetic theory of mixtures, which include viscous dissipation in the model. Governing equations are analyzed…

偏微分方程分析 · 数学 2023-05-16 Bérénice Grec , Srboljub Simic

A mixture of two kinds of identical bosons held in a harmonic potential and interacting by harmonic particle-particle interactions is discussed. This is an exactly-solvable model of a mixture of two trapped Bose-Einstein condensates which…

量子气体 · 物理学 2017-02-14 Shachar Klaiman , Alexej I. Streltsov , Ofir E. Alon

The time evolution of a homogeneous bidisperse granular suspension is studied in the context of the Enskog kinetic equation. The influence of the surrounding viscous gas on the solid particles is modeled via a deterministic viscous drag…

软凝聚态物质 · 物理学 2021-09-24 Rubén Gómez González , Vicente Garzó

The hierarchy of moment equations derived from the nonlinear Boltzmann equation is solved for a gas of Maxwell molecules undergoing a stationary Poiseuille flow induced by an external force in a pipe. The solution is obtained as a…

统计力学 · 物理学 2007-05-23 M. Sabbane , M. Tij , A. Santos

A new lattice Boltzmann model for reactive ideal gas mixtures is presented. The model is an extension to reactive flows of the recently proposed multi-component lattice Boltzmann model for compressible ideal gas mixtures with Stefan-Maxwell…

流体动力学 · 物理学 2021-01-06 N. Sawant , B. Dorschner , I. V. Karlin

The Enskog kinetic theory for moderately dense granular suspensions is considered as a model to determine the Navier-Stokes transport coefficients. The influence of the interstitial gas on solid particles is modeled by a viscous drag force…

统计力学 · 物理学 2019-09-09 Rubén Gómez González , Vicente Garzó

We propose a new formulation of the fluctuating lattice Boltzmann equation that is consistent with both equilibrium statististical mechanics and fluctuating hydrodynamics. The formalism is based on a generalized lattice-gas model, with each…

软凝聚态物质 · 物理学 2009-11-13 Burkhard Duenweg , Ulf D. Schiller , Anthony J. C. Ladd