多粒子数値解析を用いたラブルパイル小惑星の構造に対する考察

摘要

The asteroid exploration spacecfaft "HAYABUSA" took high resolution pictures of asteroid ITOKAWA.ITOKAWA is a rubble-pile asteroid, and its shape and regolith size distribution has unique features. These featuresare considered to be caused by composite problem of the Brazil-Nut effect and centrifugal force. The Brazil-Nuteffect is generally known as the phenomenon that causes larger particles to rise to the top of the shaken granularmixtures. In this study, we analyze the behaviours of different size particles in the space by numerical simulationusing multi-particle model.