Model of SNR expansion in inhomogeneous ambient

When a star explodes in a supernova, its materials are ejected away at high velocity, forming what is called a Supernova Remnant (SNR). The materials then interact with the ambient, during the expansion phase, and as the blast wave of the explosion expands, the ambient materials are heated up and "compressed". In this surface of contact discontinuity materials with different densities come into contact, developing hydrodinamic instabilities (Rayleigh-Taylor, Kelvin-Helmholtz). In this model a spherical-symmetric SNR expands in a inhomogeneous ambient made up of interstellar medium (ISM) and a Ring of dense material. Here the pressure wave is represented in transparent blue, while SNR materials of different densities are purple to green and Ring materials of different densities are black to yellow. The model was generated by 3D-reconstruction of a ~1000y 2D HD simulation made using the PLUTO Code, with rotational simmetry on the central axis of the SNR and reflection simmetry on the equatorial plane.