抄録
The adhesive strength distributions of particles were experimentally evaluated based on the reentrainment phenomena. Fully dispersed fine aerosol particles were deposited on a test piece, and the particle reentrainment tests were carried out in an air-flow channel. Then, the relationships between reentrainment efficiency and the corresponding wall shear stress were obtained. Two kinds of adhesive strength distribution were found to be obtained from the reentrainment efficiency curve:one is related to particle-wall interaction (adhesion), and the other is related to particle-particle interaction (cohesion). They were caused by the reentrainment of primary particles and agglomerated particles, respectively. Both of the two kinds of adhesive strength distribution were represented by a log-normal distribution and were evaluated based on the geometric mean and the geometric standard deviation. Further-more, the mass fraction of reentrained agglomerated particles was well represented by a simple equation derived from the analysis of the reentrainment phenomena.
