Parallel algorithms of direct solving the Boltzmann equation in aerodynamics problems

The present paper describes possibilities of parallel algorithms of the direct solving the Boltzmann equations with different numerical schemes. Two decomposition methods for parallelization in physical and velocity spaces are applied. Simulations of 2-D and 3-D jet flows with these parallel schemes are carried out on distributed memory parallel computers in a wide range of Knudsen numbers. The most interesting results concern the behaviour at small Knudsen numbers, especially instability in a mixing layer.