Formation of compound chondrule in the shock-wave heating model. : three-dimensional hydrodynamic simulation of disruption of molten dust particle.

Abstract

We carried out three-dimensional hydrodynamic simulations to examine disruption of the molten dust particle exposed to fast gas flow and estimated the ejection velocity, average size, and number of ejectors in the framework of shock-wave heating model. We found that collision frequency predicted from our numerical results is much higher than observational frequency of compound chondrules for various parameters (radius of parent particle, ram pressure of gas flow, viscosity of molten part). We also found that two individual ejectors collide actually in our simulation because of the effect that one ejector blocks out the gas flow toward another one (shadow effect).