Above is a simulation of supersonic driven turbulence with the code Arepo. The red represents a low density isocontour and the green and blue represent high density isocontours. We see shocks and dissipation of structure to smaller scales.
Above is a simulation of subsonic turbulence. Now there are no shocks, and the density varies more smoothly.
Above is the evolution of the magnetic field turbulence in a quasi-relativistic shock as the shock front propagates towards the right. The upstream turbulence is thought to be an essential ingredient for sustaining the Fermi acceleration.
Above video shows a current sheet and magnetic islands forming in a magnetic reconnection simulation.
Above is the simulation of an isolated disk galaxy. As the galaxy evolves, it starts to fragment into filaments and form high-density structures. Stars wil be formed in those high-density regions.
Above is a simulation of a galaxy merger. As the galaxies approach, their gas content starts to mix. The final result of this collision of galaxies will be an elliptical galaxy.