Simulation of Billiards and of Hard Body Fluids

摘要: Recent computer simulations have contributed significantly to our understanding of the Lyapunov instability hard particle systems in equilibrium and nonequilibrium steady states. We discuss a very general method for computation full spectra apply it billiards many-body disk sphere systems. The velocity correlation function billiard flows is also discussed. For perturbed states associated with smallest exponents (in absolute magnitude) are shown reveal collective dynamic modes. study properties these modes provide examples two dimensions. It suggested that there connection familiar from fluctuating hydrodynamics. largest exponent, however, localized perturbations fluid.