Influence of internal energy on the stability of relativistic flows
  A set of simulations concerning the influence of internal energy on the stability of relativistic jets is presented. Results show that perturbations saturate when the amplitude of the velocity perturbation approaches the speed of light limit. Also, contrary to what predicted by linear stability theory, jets with higher specific internal energy appear to be more stable. 
Manuel Perucho, Michal Hanasz, Jose Maria Marti and Helene Sol