Projective integration schemes for hyperbolic moment equations

In this paper, we apply projective integration methods to hyperbolic moment models of the Boltzmann equation and BGK equation, investigate numerical properties resulting scheme. Projective is an explicit scheme that tailored problems with large spectral gaps between slow (one or many) fast eigenvalue clusters model. The analysis a linearized model clearly shows reveals multi-scale nature for which matching choice. combination non-intrusive method allows accurate, but efficient simulations significant speedup, as demonstrated using several 1D 2D test cases different collision terms, frequencies relaxation times.