On the spectral problems for the discrete Boltzmann models

Authors
Citation
Akh. Chu et Jj. Fang, On the spectral problems for the discrete Boltzmann models, CHIN PHYS L, 17(3), 2000, pp. 159-161
Citations number
19
Categorie Soggetti
Physics
Journal title
CHINESE PHYSICS LETTERS
ISSN journal
0256307X → ACNP
Volume
17
Issue
3
Year of publication
2000
Pages
159 - 161
Database
ISI
SICI code
0256-307X(2000)17:3<159:OTSPFT>2.0.ZU;2-O
Abstract
The discrete Boltzmann models are used to study the spectral problems relat ed to the one-dimensional plane wave propagation in monatomic gases which a re fundamental in the nonequilibrium statistical thermodynamics. The result s show that the 8-velocity model can only describe the propagation of the d iffusion mode (entropy wave) in the intermediate Knudsen number regime. The 4- and G-velocity models, instead, can describe the propagation of sound m odes quite well, after comparison with the continuum-mechanical results.