Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2004-12-13
Phys. Rev. E 72, 041303 (2005)
Physics
Condensed Matter
Statistical Mechanics
8 pages, 5 figures
Scientific paper
10.1103/PhysRevE.72.041303
We performed event-driven simulations of a two-dimensional granular gas between two vibrating walls and directly measured the local heat flux and energy dissipation rate in the stationary state. Describing the local heat flux as a function of the coordinate x in the direction perpendicular to the driving walls, we use a generalization of Fourier's law, q_x(x) = kappa d_x T(x) + mu d_x rho(x), to relate the local heat flux to the local gradients of the temperature and density. This ansatz accounts for the fact that density gradients also generate heat flux, not only temperature gradients. The transport coefficients kappa and mu are assumed to be independent of x, and we check the validity of this assumption in the simulations. Both kappa and mu are determined for different system parameters, in particular, for a wide range of coefficients of restitution. We also compare our numerical results to existing hydrodynamic theories. Agreement is found for kappa for very small inelasticities only. Beyond this region, kappa and mu exhibit a striking non-monotonic behavior.
Herbst Olaf
Müller Peter
Zippelius Annette
No associations
LandOfFree
Local heat flux and energy loss in a 2D vibrated granular gas does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Local heat flux and energy loss in a 2D vibrated granular gas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Local heat flux and energy loss in a 2D vibrated granular gas will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-115339