Large-eddy simulation of nonlinear evolution and breakdown to turbulence in high-speed boundary layers
The nonlinear evolution and laminar-turbulent breakdown of a boundary layer flow along a cylinder at Mach number 4.5 is investigated with large-eddy temporal simulation. The results are validated using direct numerical simulation data. The structure of the flow during the transition process is studied in terms of the vorticity field. The subgrid scales are modeled dynamically, where the model coefficients are determined as part of the solution from the local resolved field. A new dynamic model that utilizes the second-order velocity structure function is used to parametrize the small-scale field. The evolution to turbulence is simulated with dynamic subgrid-scale modeling at least in terms of average quantities as well as vorticity fields.
second-order velocity structure function
scientific article; zbMATH DE number 762150
scientific article