Complex Effects in Large Eddy Simulations

The field of Large Eddy Simulations is reaching a level of maturity that brings this approach to the mainstream of engineering computations, while it opens opportunities and challenges. The main objective of this volume is to bring together leading experts in presenting the state-of-the-art and emerging approaches for treating complex effects in LES. A common theme throughout is the role of LES in the context of multiscale modeling and simulation.

Zusammenfassung
This volume contains a collection of expert views on the state of the art in Large Eddy Simulation (LES) and its application to complex ?ows. Much of the material in this volume was inspired by contributions that were originally presented at the symposium on Complex E?ects in Large Eddy Simulation held in Lemesos (Limassol), Cyprus, between September 21st and 24th, 2005. The symposium was organized by the University of Cyprus together with the Center for Turbulence Research at Stanford University and NASA Ames Research Center. Many of the problems that must be tackled in order to advance techn- ogy and science increasingly require synergetic approaches across disciplines. Computational Science refers to interdisciplinary research aiming at the so- tion of complex scienti?c and engineering problems under the unifying theme of computation. The explosive growth of computer power over the last few decades, and the advancement of computational methods, have enabled the applicationofcomputationalapproachestoanever-increasingsetofproblems. One of the most challenging problems to treat computationally in the discipline of Computational Fluid Dynamics is that of turbulent ?uid ?ow.

Inhalt
Complex Effects in Large Eddy Simulations.- On the Relation between Subgrid-Scale Modeling and Numerical Discretization in Large-Eddy Simulation.- Space-Time Error Representation and Estimation in Navier-Stokes Calculations.- Multiresolution Particle Methods.- LES Computation of Lagrangian Statistics in Homogeneous Stationary Turbulence; Application of Universalities under Scaling Symmetry at Sub-Grid Scales.- Anisotropic Subgrid-Scale Modelling: Comparison of LES with High Resolution DNS and Statistical Theory for Rapidly Rotating Turbulence.- On the Investigation of a Dynamic Nonlinear Subgrid-Scale Model.- Three Problems in the Large-Eddy Simulation of Complex Turbulent Flows.- Filtering the Wall as a Solution to the Wall-Modeling Problem.- ANear-Wall Eddy-Viscosity Formulation for LES.- Investigation of Multiscale Subgrid Models for LES of Instabilities and Turbulence in Wake Vortex Systems.- Numerical Determination of the Scaling Exponent of the Modeled Subgrid Stresses for Eddy Viscosity Models.- A Posteriori Study on Modelling and Numerical Error in LES Applying the Smagorinsky Model.- Passive Scalar and Dissipation Simulations with the Linear Eddy Model.- Lattice-Boltzmann LES of Vortex Shedding in the Wake of a Square Cylinder.- LES on Cartesian Grids with Anisotropic Refinement.- Towards Time-Stable and Accurate LES on Unstructured Grids.- A Low-Numerical Dissipation, Patch-Based Adaptive-Mesh-Refinement Method for Large-Eddy Simulation of Compressible Flows.- Large-Eddy Simulation of Richtmyer-Meshkov Instability.- LES of Variable Density Bifurcating Jets.- Large-Eddy Simulation of a Turbulent Flow around a Multi-Perforated Plate.- Simulation of Separation from Curved Surfaces with Combined LES and RANS Schemes.- Highly Parallel Large Eddy Simulations of Multiburner Configurations in Industrial Gas Turbines.- Response of a Swirled Non-Premixed Burner to Fuel Flow Rate Modulation.- Investigation of Subgrid Scale Wrinkling Models and Their Impact on the Artificially Thickened Flame Model in Large Eddy Simulations.- Analysis of Premixed Turbulent Spherical Flame Kernels.- Large Eddy Simulation of a Turbulent Ethylene/Air Diffusion Flame.- Energy Fluxes and Shell-to-Shell Transfers in MHD Turbulence.