Abstract
In the shock-wave heating model, which is a plausible model for chondrule formation, dust particles are heated by the gas frictional heating. So it is naturally expected that the dust particle starts to melt from surface to inside and a state where the surface of the particle is liquid and the center is solid is realized (it is called the partial melting state in this study). Kato et al. (2005) and Kadono and Arakawa (2005) show that the process of stripping of the liquid surface by the gas flow may determine the maximal size and size distribution of chondrules assuming that partial melting state is realized in a dust particle. In this study, we examined whether or not the partial melting state is realized in the dust particle by solving a three-dimentional time dependent heat conduction equation. We found that the partial melting state is realized in the shock-wave heating model. And for dust particles of 1mm or larger in radius, the stripping, which is likely to take place for those particles, seems important, because it prevents large dust particles from forming mixed structure.
