抄録
Particle reentrainment from a fine powder layer was investigated both theoretically and experimentally by use of an accelerated air flow. Reentrainment fluxes and critical reentrainment velocities were calculated under several conditions by the previously reported reentrainment model. The model is based on the adhesive strength distribution of particles, the surface renewal of the powder layer, and the time dependent reentrainment rate.
It is found that the reentrainment flux increases with increasing average air velocity, and the reentrainment flux is approximately proportional to the air acceleration. It is also found that the critical reentrainment velocity decreases as the acceleration increases. This tendency becomes more prominent for smaller acceleration. These theoretically estimated phenomena are well supported by the experimental data on the reentrainment flux and critical reentrainment velocity.
