Granular Gaseous Flows, 1st ed. 2019 A Kinetic Theory Approach to Granular Gaseous Flows Soft and Biological Matter Series
Auteur : Garzó Vicente
Back Cover Text:
This book addresses the study of the gaseous state of granular matter in the conditions of rapid flow caused by a violent and sustained excitation. In this regime, grains only touch each other during collisions and hence, kinetic theory is a very useful tool to study granular flows. The main difference with respect to ordinary or molecular fluids is that grains are macroscopic and so, their collisions are inelastic. Given the interest in the effects of collisional dissipation on granular media under rapid flow conditions, the emphasis of this book is on an idealized model (smooth inelastic hard spheres) that isolates this effect from other important properties of granular systems. In this simple model, the inelasticity of collisions is only accounted for by a (positive) constant coefficient of normal restitution.
The author of this monograph uses a kinetic theory description (which can be considered as a mesoscopic description between statistical mechanics and hydrodynamics) to study granular flows from a microscopic point of view. In particular, the inelastic version of the Boltzmann and Enskog kinetic equations is the starting point of the analysis. Conventional methods such as Chapman-Enskog expansion, Grad?s moment method and/or kinetic models are generalized to dissipative systems to get the forms of the transport coefficients and hydrodynamics. The knowledge of granular hydrodynamics opens up the possibility of understanding interesting problems such as the spontaneous formation of density clusters and velocity vortices in freely cooling flows and/or the lack of energy equipartition in granular mixtures.
Some of the topics covered in this monograph include:
1. Kinetic theory of inelastic hard spheres.- Introduction.- Enskog kinetic equation for granular gases at moderate densities . Macroscopic balance equations.- Chapman-Enskog expansion.- Enskog kinetic equation for granular mixtures. Low-density regime.- Kinetic models for simple and multicomponent granular gases.- 2. Homogeneous cooling states (HCS).- One-particle distribution function: scaling solution.- Sonine polynomial expansion: fourth cumulant of the distribution function.- Granular mixtures: energy nonequipartition.- Fourth cumulant of the distribution function of each species.- Driven granular mixtures.- 3. Navier-Stokes transport coefficients for simple granular gases.- Navier-Stokes hydrodynamics equations.- First-order Chapman-Enskog solution. Integral equations defining the transport coefficients.- Sonine polynomial approximations.- Shear and bulk viscosities coefficients.- Thermal conductivity coefficient and the Dufour-like transport coefficient.- Modified Sonine approximation.- Stability of the linearized hydrodynamic equations. Dispersion relations.- 4. Navier-Stokes transport coefficients for multicomponent granular gases.- Navier-Stokes hydrodynamics equations for granular mixtures.- Sonine polynomial approximations.- Transport coefficients. Comparison with computer simulations.- Onsager’s reciprocal relations.- Linearized hydrodynamic equations and stabiltiy.- Einstein relation.- Thermal diffusion segregation.- 5. Non-Newtonian steady states for granular gases.- Simple shear flow. Rheological properties.- Energy nonequipartition under shear flow.- Nonlinear Couette flows. Grad’s moment method and kinetic models.- Transport near steady shear flow states.- Stability. 6. Inelastic Maxwell models for granular gases.-Introduction.- Collisional moments.- Navier-Stokes hydrodynamic description.- Uniform shear flow (USF).- Small spatial perturbations around the USF.- Intruder in a granular sheared mixture: a new non-equilibrium phase transition.- 7. Transport coefficients for granular gas-solid flows.- Introduction.- Enskog kinetic equation for monodisperse gas-solid flows.- Navier-Stokes transport coefficients. Stability.- Non-Newtonian hydrodynamics for a dilute granular suspension under USF.- Boltzmann kinetic equation for multicomponent gas-solid flows.- Stability.-Onsager’s reciprocal relations.
Vicente Garzó is Professor of Theoretical Physics in the Department of Physics at the University of Extremadura. He graduated in Physics from the University of Valencia (Spain) in 1982 where he also obtained a PhD in Physics in 1986. Then he spent two years at the University of Sevilla (Spain) as a Teaching assistant. Next he moved to the University of Extremadura (Spain) in 1998 where he got a permanent position. He has performed short and long stays as Visiting Faculty at the Instituto de Investigación en Materiales (UNAM, México), the University of Florida (USA), the Université Paris-Sud (France), the University of Colorado (USA), la Universidad de Chile (Chile), and the Yukawa Institute for Theoretical Physics (Kyoto University, Japan).
He is a reputed specialist in kinetic theory. During the first years of his career, his research was mainly focused on the study of nonlinear transport properties using the Boltzmann kinetic equation and related kinetic models. These efforts were partially collected in a monograph co-authored with A. Santos (Kinetic Theory of Gases in Shear Flows: Nonlinear Transport) and published by Kluwer Academic Publishers in 2003. In the last eighteen years, he has extended his background in kinetic theory by applying this tool to the study of the so-called granular rapid flows (granular matter under rapid flow conditions), collaborating in some of the most important advances in the field. For instance, he has worked on the generalization of the Chapman-Enskog method and kinetic modeling to granular gases, the derivation of explicit forms for the Navier-Stokes transport coefficients for mono- and multicomponent systems, as well as several applications of kinetic theory (segregation, instabilities in undriven and driven granular systems,..) to granular flows. He has published 156 papers in regular international journals and has delivered 20 invited lectures in several conferences and work
Presents granular fluids as complex systems in an inherent non-equilibrium state
Introduces a simple idealized model to study collisional dissipation in granular media under rapid flow conditions
Presents the surprising insight that the energy equipartition theorem is broken for freely cooling granular mixtures
Written by a highly reputed expert in kinetic theory and its many applications
Date de parution : 03-2019
Ouvrage de 394 p.
15.5x23.5 cm
