Computational resources have developed to the level that, for the first time, it is becoming possible to apply large-eddy simulation (LES) to turbulent flow problems of realistic complexity. Many examples can be found in technology and in a variety of natural flows. This puts issues related to assessing, assuring, and predicting the quality of LES into the spotlight. Several LES studies have been published in the past, demonstrating a high level of accuracy with which turbulent flow predictions can be attained, without having to resort to the excessive requirements on computational resources imposed by direct numerical simulations. However, the setup and use of turbulent flow simulations requires a profound knowledge of fluid mechanics, numerical techniques, and the application under consideration. The susceptibility of large-eddy simulations to errors in modelling, in numerics, and in the treatment of boundary conditions, can be quite large due to nonlinear accumulation of different contributions over time, leading to an intricate and unpredictable situation. A full understanding of the interacting error dynamics in large-eddy simulations is still lacking. To ensure the reliability of large-eddy simulations for a wide range of industrial users, the development of clear standards for the evaluation, prediction, and control of simulation errors in LES is summoned. The workshop on Quality and Reliability of Large-Eddy Simulations, held October 22-24, 2007 in Leuven, Belgium (QLES2007), provided one of the first platforms specifically addressing these aspects of LES.
Author(s): A. Labovschii, W. Layton, C. Manica, M. Neda, L. Rebholz, I. Stanculescu, C. Trenchea (auth.), Johan Meyers, Bernard J. Geurts, Pierre Sagaut (eds.)
Series: Ercoftac Series 12
Edition: 1
Publisher: Springer Netherlands
Year: 2008
Language: English
Pages: 378
City: [New York?]
Tags: Mechanics, Fluids, Thermodynamics; Numerical and Computational Methods
Front Matter....Pages I-XX
Front Matter....Pages 1-1
Architecture of Approximate Deconvolution Models of Turbulence*....Pages 3-20
Adaptive Turbulence Computation Based on Weak Solutions and Weak Uniqueness....Pages 21-35
On the Application of Wavelets to LES Sub-grid Modelling....Pages 37-48
Analysis of Truncation Errors and Design of Physically Optimized Discretizations....Pages 49-60
Spectral Behavior of Various Subgrid-Scale Models in LES at Very High Reynolds Number....Pages 61-68
Performance Assessment of a New Advective Subgrid Model Through Two Classic Benchmark Test Cases....Pages 69-80
Assessment of Dissipation in LES Based on Explicit Filtering from the Computation of Kinetic Energy Budget....Pages 81-92
Optimal Unstructured Meshing for Large Eddy Simulations....Pages 93-103
Analysis of Uniform and Adaptive LES in Natural Convection Flow....Pages 105-116
Front Matter....Pages 117-117
Influence of Time Step Size and Convergence Criteria on Large Eddy Simulations with Implicit Time Discretization....Pages 119-130
Assessment of LES Quality Measures Using the Error Landscape Approach....Pages 131-142
Analysis of Numerical Error Reduction in Explicitly Filtered LES Using Two-Point Turbulence Closure....Pages 143-154
Sensitivity of SGS Models and of Quality of LES to Grid Irregularity....Pages 155-166
Anisotropic Grid Refinement Study for LES....Pages 167-178
Front Matter....Pages 179-179
Expectations in the Wall Region of a Large-Eddy Simulation....Pages 181-191
Large Eddy Simulation of Atmospheric Convective Boundary Layer with Realistic Environmental Forcings....Pages 193-204
Accuracy Close to the Wall for Large-Eddy Simulations of Flow Around Obstacles Using Immersed Boundary Methods....Pages 205-212
On the Control of the Mass Errors in Finite Volume-Based Approximate Projection Methods for Large Eddy Simulations....Pages 213-224
Front Matter....Pages 225-225
Reliability of Large-Eddy Simulation of Nonpremixed Turbulent Flames: Scalar Dissipation Rate Modeling and 3D-Boundary Conditions....Pages 227-237
LES at Work: Quality Management in Practical Large-Eddy Simulations....Pages 239-258
Front Matter....Pages 225-225
Quality of LES Predictions of Isothermal and Hot Round Jet....Pages 259-270
LES for Street-Scale Environments and Its Prospects....Pages 271-282
Large Eddy Simulations of the Richtmyer–Meshkov Instability in a Converging Geometry....Pages 283-294
Quality Assessment in LES of a Compressible Swirling Mixing Layer....Pages 295-306
Accuracy of Large-Eddy Simulation of Premixed Turbulent Combustion....Pages 307-318
Mesh Dependency of Turbulent Reacting Large-Eddy Simulations of a Gas Turbine Combustion Chamber....Pages 319-330
Analysis of SGS Particle Dispersion Model in LES of Channel Flow....Pages 331-342
Numerical Data for Reliability of LES for Non-isothermal Multiphase Turbulent Channel Flow....Pages 343-354
Lagrangian Tracking of Heavy Particles in Large-Eddy Simulation of Turbulent Channel Flow....Pages 355-366
Large-Eddy Simulation of Particle-Laden Channel Flow....Pages 367-378
