Bouncing Behavior of Microscopic Dust Aggregates

摘要: Context. Bouncing collisions of dust aggregates within the protoplanetary disk may have a significant impact on growth process planetesimals. Yet, conditions that result in bouncing are not very well understood. Existing simulations studying behavior used with an artificial, regular internal structure. Aims. Here, we study sub-mm constructed applying di erent sample preparation methods. We analyze how structure aggregate alters collisional outcome and determine influence size, porosity, collision velocity, parameter. Methods. use molecular dynamics where individual treated as spheres made up several hundred thousand monomers. The run graphic cards (GPUs). Results. Statistical bulk properties thus depend heavily method. In particular, there is no unique relation between average volume filling factor coordination number aggregate. Realistic bounce only if their exceeds 0.5 velocities below 0:1 ms 1 . Conclusions. For particles nebula suggest barrier be such strong handicap phase agglomerates, at least size range 100 m.