The Collision Model for Indoor Fine Particles and the Collision Results

In order to study the coagulation mechanism for indoor fine particles, the number of particles colliding with walls and the collision probability between particles were calculated based on the idea of statistical mean and random motion of particles. The collision results were also studied with the qualitative and quantitative analysis methods. The relationship between the final compressive deformation and the initial velocity, and that between the collision efficiency and the particle diameter, were obtained for 0.3 μm DOP particles. The results show that the coagulation possibility of particles decreases with the particle velocity, the finer particles are easier to coagulate after collision, and the collision efficiency increases with the particle diameter.