Within the proposed Euromech colloquium “Large Eddy Simulation for Aerodynamics and Aeroacoustics“, novel methods for Large Eddy Simulation (LES) of complex flows and Computational Aero-acoustics (CAA) shall be considered and discussed. As noise prediction by CAA mainly depends on the quality of the simulation of the turbulent flow field, both approaches will be considered as a common topic. Hybrid approaches based on flow field predictions by incompressible solvers will also be a topic. The aim of the colloquium is to assess and improve the state of the art approaches for prediction and analysis of complex turbulent flow fields with special emphasis on prediction and analysis of aerodynamic noise. It therefore establishes a link between classical Fluid Dynamics and Acoustics.

The use of LES for the analysis of turbulent flow fields has become one of the major trends during the past years, since there is a massive requirement of the industry for accurate three-dimensional and time resolved flow predictions, not only for noise predicitons. However, the prediction of high Reynolds number flows with complex geometry or physics is difficult due to massive computational requirements that often exceed the capacities of the available hard-ware. A number of strategies have been exploited to overcome these bottlenecks, high-order adaptive schemes, implicit sub grid scale modeling, wall models, coupling of LES with Reynolds averaged models (RANS). The impact of these strategies on quality of the solutions and efficiency of the solvers has to exploited for a broad range of flows. Special emphasis will be set on the prediction of internal and external Aerodynamic effects including aero-acoustic noise. The main classes of problems considered here are wall bounded and free shear flows ranging from channel, duct and pipe flow with distortion over wakes behind bluff bodies to jets and mixing layers.