Results 41 to 50 of about 836 (108)

An equivalent formulation of Sonine condition

Applied Mathematics Letters
Sonine kernel is characterized by the Sonine condition (denoted by SC) and is an important class of kernels in nonlocal differential equations and integral equations. This work proposes a SC with a more general form (denoted by gSC), which is more convenient than SC to accommodate complex kernels and equations.
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Steady state representation of the homogeneous cooling state of a granular gas

, 2003
The properties of a dilute granular gas in the homogeneous cooling state are mapped to those of a stationary state by means of a change in the time scale that does not involve any internal property of the system. The new representation is closely related
A. D. Rosato, A. Goldsthein, A. L. García, F. Moreno, G. Bird,, H. J. Schlichting, J. J. Brey, J. J. Brey, J. Javier Brey, K. van der Weele, M. H. Ernst, M. J. Ruiz-Montero, P. K. Haff   +12 more
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Steady self-diffusion in classical gases [PDF]

, 2013
A steady self-diffusion process in a gas of hard spheres at equilibrium is analyzed. The system exhibits a constant gradient of labeled particles. Neither the concentration of these particles nor its gradient are assumed to be small. It is shown that the
Brey, J. Javier, Ruiz-Montero, M. J.
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Segregation by thermal diffusion of an intruder in a moderately dense granular fluid

, 2009
A solution of the inelastic Enskog equation that goes beyond the weak dissipation limit and applies for moderate densities is used to determine the thermal diffusion factor of an intruder immersed in a dense granular gas under gravity.
A. Prevost, A. Rosato, A. Santos, A.P.J. Breu, B. Arnarson, B. Arnarson, C. Henrique, D. Serero, D.C. Hong, D.K. Yoon, H.-Q. Wang, J. Duran, J. Jenkins, J. Lutsko, J.B. Knight, J.E. Galvin, J.J. Brey, J.T. Jenkins, L. Trujillo, M. Schröter, R.D. Wildman, R.D. Wildman, S.R. Dahl, T. Boublik, T. Schautz, T. Shinbrot, V. Garzó, V. Garzó, V. Garzó, V. Garzó, V. Garzó, V. Garzó, V. Garzó, W. Cooken   +33 more
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Thermal diffusion segregation of an impurity in a driven granular fluid

, 2014
We study segregation of an impurity in a driven granular fluid under two types of \emph{steady} states. In the first state, the granular gas is driven by a stochastic volume force field with a Fourier-type profile while in the second state, the granular ...
Garzó, Vicente, Reyes, Francisco Vega
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Impact of high-energy tails on granular gas properties

, 2006
The velocity distribution function of granular gases in the homogeneous cooling state as well as some heated granular gases decays for large velocities as $f\propto\exp(- {\rm const.} v)$.
Arno Formella, G. A. Bird, I. Goldhirsch, J. M. Montanero, N. V. Brilliantov, Nikolai V. Brilliantov, Thorsten Pöschel   +6 more
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On the Einstein relation in a heated granular gas

, 2004
Recent computer simulation results [Barrat {\em et al.}, Physica A 334 (2004) 513] for granular mixtures subject to stochastic driving have shown the validity of the Einstein relation $\epsilon\equiv D/(T_0\lambda)=1$ between the diffusion $D$ and ...
Barrat, Barrat, Bird, Brey, Brey, Brey, Brey, Chapman, Dahl, Dufty, Esipov, Evans, Feitosa, Garzó, Garzó, Garzó, Garzó, Hoover, Krouskop, Marconi, Marconi, Martin, McLennan, Montanero, Montanero, Montanero, Pagonabarraga, Puglisi, Santos, Santos, van Noije, van Noije, Vicente Garzó, Wang, Wildman, Williams   +35 more
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Enskog Theory for Polydisperse Granular Mixtures II. Sonine Polynomial Approximation

, 2007
The linear integral equations defining the Navier-Stokes (NS) transport coefficients for polydisperse granular mixtures of smooth inelastic hard disks or spheres are solved by using the leading terms in a Sonine polynomial expansion. Explicit expressions
B. O. Arnarson, Christine M. Hrenya, J. Ferziger, J. T. Jenkins, J. T. Jenkins, James W. Dufty, M. Alam, S. Chapman, Vicente Garzó   +8 more
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Fluctuations in granular gases

, 2008
A driven granular material, e.g. a vibrated box full of sand, is a stationary system which may be very far from equilibrium. The standard equilibrium statistical mechanics is therefore inadequate to describe fluctuations in such a system. Here we present
A Baldassarri, A Barrat, A Barrat, A Puglisi, A Puglisi, A Puglisi, A Puglisi, AV Bobylev, C Henrique, C Maes, DJ Evans, DJ Evans, DJ Evans, DJ Evans, DL Blair, DRM Williams, E Ben-Naim, E Ben-Naim, EL Grossman, F Coppex, G Gallavotti, G Peng, GA Bird, I Pagonabarraga, J Farago, J Farago, J Javier Brey, J Kurchan, JC Maxwell, JJ Brey, JJ Brey, JJ Brey, JJ Brey, JL Lebowitz, JoséM Montanero, K Feitosa, MH Ernst, MH Ernst, P Visco, P Visco, P Visco, PA Martin, R Zon van, S Aumaître, S Aumaître, S Chapman, S McNamara, S McNamara, SJ Moon, SR Groot de, ST Bramwell, TPC Noije van, TPC Noije van, V Kumaran, W Feller   +54 more
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Sonine approximation for collisional moments of granular gases of inelastic rough spheres

, 2011
We consider a dilute granular gas of hard spheres colliding inelastically with coefficients of normal and tangential restitution $\alpha$ and $\beta$, respectively. The basic quantities characterizing the distribution function $f(\mathbf{v},\bm{\omega})$
Kremer, Gilberto M., Santos, Andrés, Santos, Marcelo dos   +2 more
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