| Abstract: | The transition of a Mach 0.5 jet issuing from a rectangular nozzle with aspect ratio of 5 and a Reynolds number based on the smaller nozzle dimension of 2000 is simulated by Direct Numerical Simulations (DNS). We developed a high‐order simulation method for non‐axisymmetric jet flows solving the three‐dimensional compressible Navier‐Stokes equations. The transition process was triggered using a spatially evolving unstable mode from linear stability analysis at the inflow. A rapid breakup of the initially laminar jet to three‐dimensional small scale turbulence is found. |
