Ebook: Complex Effects in Large Eddy Simulations

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.

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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 new opportunities and brings new challenges for further progress.

The main objective of this volume is to bring together leading experts from different countries in presenting the state-of-the-art and emerging approaches for treating complex effects in LES. A common theme throughout the volume is the role of LES in the context of multiscale modeling and simulation.

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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 new opportunities and brings new challenges for further progress.

The main objective of this volume is to bring together leading experts from different countries in presenting the state-of-the-art and emerging approaches for treating complex effects in LES. A common theme throughout the volume is the role of LES in the context of multiscale modeling and simulation.

Content:
Front Matter....Pages I-XI
Complex Effects in Large Eddy Simulations....Pages 1-14
On the Relation between Subgrid-Scale Modeling and Numerical Discretization in Large-Eddy Simulation....Pages 15-27
Space-Time Error Representation and Estimation in Navier-Stokes Calculations....Pages 29-48
Multiresolution Particle Methods....Pages 49-61
LES Computation of Lagrangian Statistics in Homogeneous Stationary Turbulence; Application of Universalities under Scaling Symmetry at Sub-Grid Scales....Pages 63-75
Anisotropic Subgrid-Scale Modelling: Comparison of LES with High Resolution DNS and Statistical Theory for Rapidly Rotating Turbulence....Pages 77-88
On the Investigation of a Dynamic Nonlinear Subgrid-Scale Model....Pages 89-97
Three Problems in the Large-Eddy Simulation of Complex Turbulent Flows....Pages 99-115
Filtering the Wall as a Solution to the Wall-Modeling Problem....Pages 117-126
ANear-Wall Eddy-Viscosity Formulation for LES....Pages 127-140
Investigation of Multiscale Subgrid Models for LES of Instabilities and Turbulence in Wake Vortex Systems....Pages 141-159
Numerical Determination of the Scaling Exponent of the Modeled Subgrid Stresses for Eddy Viscosity Models....Pages 161-172
Passive Scalar and Dissipation Simulations with the Linear Eddy Model....Pages 173-189
Lattice-Boltzmann LES of Vortex Shedding in the Wake of a Square Cylinder....Pages 191-202
LES on Cartesian Grids with Anisotropic Refinement....Pages 203-217
Towards Time-Stable and Accurate LES on Unstructured Grids....Pages 219-233
A Low-Numerical Dissipation, Patch-Based Adaptive-Mesh-Refinement Method for Large-Eddy Simulation of Compressible Flows....Pages 235-249
Large-Eddy Simulation of Richtmyer-Meshkov Instability....Pages 251-262
LES of Variable Density Bifurcating Jets....Pages 263-271
Large-Eddy Simulation of a Turbulent Flow around a Multi-Perforated Plate....Pages 273-288
Simulation of Separation from Curved Surfaces with Combined LES and RANS Schemes....Pages 289-303
Highly Parallel Large Eddy Simulations of Multiburner Configurations in Industrial Gas Turbines....Pages 305-324
Response of a Swirled Non-Premixed Burner to Fuel Flow Rate Modulation....Pages 325-336
Investigation of Subgrid Scale Wrinkling Models and Their Impact on the Artificially Thickened Flame Model in Large Eddy Simulations....Pages 337-351
Analysis of Premixed Turbulent Spherical Flame Kernels....Pages 353-369
Large Eddy Simulation of a Turbulent Ethylene/Air Diffusion Flame....Pages 371-383
Energy Fluxes and Shell-to-Shell Transfers in MHD Turbulence....Pages 385-399
Back Matter....Pages 401-412
....Pages 413-445