This paper investigates flow past a backward-facing step (BFS) in duct at Reynolds number $Re = 5080$ based on height, mean inflow velocity and fluid kinematic viscosity. The configuration matches combustion experiment conducted by Pitz Daily 1983. High-resolution fields are obtained OpenFOAM direct numerical simulation, the field analysed Lagrangian approaches. Trajectories of particles areas ...

The results of an analysis of turbulent pipe flow based on a Karhunen-Loève decomposition are presented. The turbulent flow is generated by a direct numerical simulation of the Navier-Stokes equations using a spectral element algorithm at a Reynolds number Reτ = 150. This simulation yields a set of basis functions that captures 90% of the energy after 2,453 modes. The eigenfunctions are categor...

Abstract Dynamic stall on an airfoil comprises a series of complex aerodynamic phenomena in response to an unsteady change of the angle of attack. It is accompanied by a lift overshoot and delayed massive flow separation with respect to static stall. The classical hallmark of the dynamic stall phenomenon is the dynamic stall vortex. The flow over an oscillating OA209 airfoil under dynamic stall...