| Автор | R Brito |
| Автор | H J Bussemaker |
| Автор | M H Ernst |
| Дата выпуска | 1992-08-07 |
| dc.description | A lattice gas automaton lacks Galilei invariance, and equilibria of systems moving with a finite speed mod u mod are not simply related by a Galilei transformation to the equilibrium distribution in the rest frame. In the hydrodynamic description of low speed equilibria in lattice gas automata a factor G(p) appears in the nonlinear convective term, Delta . G(p)puu, of the Navier-Stokes equation, that differs from unity due to lack of Galilei invariance. For this non-Galilean factor an expression in terms of fluctuating quantities is derived, a grand ensemble where the total momentum is fluctuating around a zero average. The formula is valid as long as there exists a unique equilibrium state. Consequently, the results can also be used for a direct simulation of G(p) in lattice gas models where the explicit form of the equilibrium distribution is not known, such as in models that violated semi-detailed balance. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | A fluctuation formula for the nonGalilean factor in lattice gas automata |
| Тип | lett |
| DOI | 10.1088/0305-4470/25/15/009 |
| Print ISSN | 0305-4470 |
| Журнал | Journal of Physics A: Mathematical and General |
| Том | 25 |
| Первая страница | L949 |
| Последняя страница | L954 |
| Аффилиация | R Brito; Inst. for Theor. Phys., Utrecht Univ., Netherlands |
| Аффилиация | H J Bussemaker; Inst. for Theor. Phys., Utrecht Univ., Netherlands |
| Аффилиация | M H Ernst; Inst. for Theor. Phys., Utrecht Univ., Netherlands |
| Выпуск | 15 |
