  In this work, a discontinuous Galerkin scheme is employed to perform LES
simulations of supersonic jet flows. A total of four simulations are performed
with different meshes and order of accuracy. The number of degrees of freedom
from the simulations varies from 50 x 106 to 400 x 106. The results indicate
that by increasing the resolution of simulation, in general, the results got
closer to experimental data. The jet lipline is the only region in which this
behavior is not observed. It investigated a procedure of using lower-order
simulations to initialize high-order simulations and consequently reduce the
total time of the simulation using high-order schemes. This strategy is
successful and allows to perform high-order simulations with only 5% more
computational effort than a complete second-order simulation.

Fluid Dynamics