Formation of disturbed area around fast meteor body

The ablation of meteoroids essentially influences all processes connected with or initiated by meteoroid entry. Evaporated meteor substance interacts with incoming air flow and forms disturbed area both around and behind the meteor body. Air-meteoroid interaction may be described in the frame of particle-beam model which permits to estimate parameters of formed vapor. The solution of Boltzman equation by the Monte Carlo method allows us to consider air particles interactions with meteor body and vapor cloud formed around it, permits to determine the energy, momentum, and mass transfer and to consider not only primary particle interaction but also the fate of secondary formed particles. The gasdynamical description is used for vapor cloud formed as the result of ablation, nearby wake evolution, radiation field. (Author)