  The present study is concerned with large-eddy simulations (LES) of
supersonic jet flows. The work addresses, in particular, the simulation of a
perfectly expanded free jet flow with an exit Mach number of 1.4 and an exit
temperature equal to the ambient temperature. Calculations are performed using
a nodal discontinuous Galerkin method. The present effort studies the effects
of mesh and polynomial refinement on the solution. The present calculations
consider computational meshes and polynomial orders such that the number of
degrees of freedom (DOFs) in the solution ranges from 50 to 410 million. Mean
velocity results and root mean square (RMS) values of velocity fluctuations
indicate a better agreement with experimental data as the resolution is
increased. The generated data provide a good understanding of the effects of
increasing the discretization refinement for LES calculations of jet flows. The
present results can guide future simulations of similar flow configurations.
