The fractal characteristics of particles in granular material flows and its effect on effective thermal conductivity

摘要

According to the fact that many pulverized particles posses fractal characteristic, a fractal model for studying fine particles in granular material flows is first proposed. An expression of particles' fractal distribution is derived to describe the relationship between the particle fractal dimensions and particle velocity distribution function. In accordance with this mode, the theoretical particle effective thermal conductivity is derived.