Dynamic structure factor in single- and two-species thermal GBL lattice gas

The two-dimensional 19-bits GEL lattice gas model conserves energy in a non-trivial way, allowing temperature, temperature gradients, and heat conduction. We describe the thermodynamics of the model, its equilibrium properties, and confirm the change of sound speed with energy density at fixed density with simulation results. The sound speed, the sound damping, and the thermal diffusivity are extracted from the dynamic structure factor and shown for various energy densities at fixed density. We have extended the 19 bits GEL model with multiple-species (miscible fluid model) and have measured the dynamic structure factor for this two-component thermal lattice gas model. (C) 2000 Elsevier Science B.V. All rights reserved.