Numerical investigation of the turbulent boundary layer over a bump

Large-eddy simulation (LES) is used to calculate the flow of a statistically two-dimensional turbulent boundary layer over a bump. Subrigid-scale stresses in the filtered Navier-Stokes equation are closed during the dynamic eddy viscosity model. LES predictions for a range of grid resolutions are compared to the experimental measurements of Webster et al. Analysis of the flow confirmed the existence of internal layers over the bump surface upstream of the summit and along the downstream trailing flat plate, and demonstrate that the quasi-step increases in skin friction and surface curvature selectively enhancing near-wall shear production of turbulent stresses.