The anisotropy of free path in a vibro-fluidized granular gas
Mei Yifeng1, Chen Yanpei1, †, , Wang Wei1, Hou Meiying2
       

The spatial profiles of local free path λ, for (a) e = 0.99 and (b) e = 0.9. Other parameters are Lx = Ly = 300, N = 1000, Vdriven = 5.