Industrial Use of Large-Eddy Simulation: Numeric, Inlet Boundary Conditions, Wall Flows

A few challenges regarding the development of Large-Eddy Simulation as in-dustrial applications are reviewed and studied. The three-dimensional time-dependant Navier-Stokes equations are solved using the finite volume collocated code of EDF, namely Code Saturne. All the investigations are carried out with the classic Smagorinsky model on the channel flow case at . The results of the Large-Eddy Simulation will be systematically compared to the available Direct-Numerical Simulation data of Kim and al. [6]. A reference calculation is first proposed. The main features of the instanta-neous structures are reviewed and the statistics compared to the DNS. The effect of several numerical options on the results such as the time step, the Rhie and Chow filter or the inner-iteration on the SIMPLEC algorithm is also studied. Issues of mesh refinement are also addressed. The same simulation is run with three different conform meshes with different refinements. The finer mesh is found to be unable to resolve all the energy containing scales and the need for finer mes