＜正＞ We present a model of non-uniform granular gases in one-dimensional case,whose granularity distributionhas the fractal characteristic.We have studied the nonequilibrium properties of the system by means of Monte Carlomethod.When the typical relaxation time τ of the Brownian process is greater than the mean collision time τc,theenergy evolution of the system exponentially decays,with a tendency to achieve a stable asymptotic value,and the systemfinally reaches a nonequilibrium steady state in which the velocity distribution strongly deviates from the Gaussian one.Three other aspects have also been studied for the steady state:the visualized change of the particle density,the entropyof the system and the correlations in the velocity of particles.And the results of simulations indicate that the systemhas strong spatial clustering;Furthermore,the influence of the inelasticity and inhomogeneity on dynamic behaviorshave also been extensively investigated,especially the dependence of the entropy and the correlations in the velocity ofparticles on the restitute coefficient e and the fractal dimension D.
展开▼
