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DY: Fachverband Dynamik und Statistische Physik

DY 34: Fluid Dynamics and Turbulence II

DY 34.3: Vortrag

Donnerstag, 17. März 2011, 14:45–15:00, ZEU 255

LES using Lattice Boltzmann Methods — •Georg Eitel-Amor, Matthias Meinke, and Wolfgang Schröder — Aerodynamisches Institut, RWTH Aachen University, Aachen

Over the last two decades the Lattice Boltzmann Method (LBM) has received a growing interest due to its efficient handling of complex geometries and its parallel scalability. The LB approach is based on the Boltzmann equation and describes macroscopic quantities using a simplified model of microscopic kinetics. The present work focuses on the application of LBM to large-eddy simulations (LES) of wall-bounded turbulent flows on hierarchically refined meshes. The single-relaxation time model, the multiple-relaxation time model, and the cascaded LBM have been analyzed concerning their stability and numerical dissipation. Besides the standard Smagorinsky technique, a dynamic eddy-viscosity model has been introduced and both techniques are validated for different flow regimes.