Thermal Segregation Beyond Navier-Stokes

Autor:	Brey, J. Javier, Khalil, Nagi, Dufty, James W.
Rok vydání:	2011
Předmět:	Condensed Matter - Statistical Mechanics Condensed Matter - Soft Condensed Matter
Zdroj:	2011 New J. Phys. 13 055019
Druh dokumentu:	Working Paper
DOI:	10.1088/1367-2630/13/5/055019
Popis:	A dilute suspension of impurities in a low density gas is described by the Boltzmann and Boltzman-Lorentz kinetic theory. Scaling forms for the species distribution functions allow an exact determination of the hydrodynamic fields, without restriction to small thermal gradients or Navier-Stokes hydrodynamics. The thermal diffusion factor characterizing sedimentation is identified in terms of collision integrals as functions of the mechanical properties of the particles and the temperature gradient. An evaluation of the collision integrals using Sonine polynomial approximations is discussed. Conditions for segregation both along and opposite the temperature gradient are found, in contrast to the Navier-Stokes description for which no segregation occurs. Comment: 9 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1102.1374 Zobrazit plný text záznamu View this record from Arxiv