Large Ion-neutral Drift Velocities and Plasma Heating in Partially Ionized Coronal Rain Blobs

Abstract In this paper we present a numerical study of the dynamics partially ionized coronal rain blobs. We use two-fluid model to perform high-resolution 2D simulation that takes into account collisional interaction between charged and neutral particles contained in plasma. follow evolution cold plasma condensation as it falls through an isothermal vertically stratified atmosphere represents much hotter lighter solar corona. consequences different degrees coupling are system. On one hand, find at dense core blob there is very strong components behave single fluid, with negligible drift velocities (of few cm s −1 ). other edges weaker larger order 1 km ) appear. addition, frictional heating causes large increases temperature transition layers For first time show such enhancements can develop consequence ion-neutral decoupling associated dynamics. This lead enhanced emission coming from rain-corona boundary, which possesses region temperature.