Dynamical Simulation of Fluidized Beds --- Hydrodynamically Interacting Granular Particles

摘要

A numerical simulation of a gas-fluidized bed is performed withoutintroduction of any empirical parameters. Realistic bubbles and slugs areobserved in our simulation. It is found that the convective motion of particlesis important for the bubbling phase and there is no convection in the sluggingphase. From the simulation results, non-Gaussian distributions are found in theparticle velocities and the relation between the deviation from Gaussian andthe local density of particles is suggested. It is also shown that the powerspectra of particle velocities obey power laws. A brief explanation on therelationship between the simulation results and the Kolmogorov scaling argumentis discussed.