Complex Effects in Large Eddy Simulations

Preface

Contents

Complex Effects in Large Eddy Simulations

1 Introduction

2 Numerical Methods

3 Wall Modeling

4 Two-Phase Flows

5 Integration

6 Novel Applications of LES

7 Conclusions

Acknowledgments

References

On the Relation between Subgrid-Scale Modeling and Numerical Discretization in Large- Eddy Simulation

1 Introduction

2 The ALDM Approach

3 Isotropic Turbulence

4 Plane-Channel Flow with Periodic Constrictions

5 Conclusions

Acknowledgments

References

Space-Time Error Representation and Estimation in Navier- Stokes Calculations

1 Introduction

2 Error Estimation of Functionals

3 Computable Error Estimates and Adaptivity

4 Extension to the Time-Dependent Navier-Stokes Equations

5 Concluding Remarks

References

Multiresolution Particle Methods

1 Introduction

2 Approximations using Particles

3 Solving Transport Problems with Particle Methods

4 Adaptive Particle Methods

5 Conclusions

References

LES Computation of Lagrangian Statistics in Homogeneous Stationary Turbulence; Application of Universalities under Scaling Symmetry at Sub- Grid Scales

1 Introduction

2 Universalities of Fragmentation under the Scaling Symmetry and Turbulent Cascade with Intermittency

3 Computational Model

4 Numerical Results and Discussion

5 Conclusions

References

Anisotropic Subgrid-Scale Modelling: Comparison of LES with High Resolution DNS and Statistical Theory for Rapidly Rotating Turbulence

1 Introduction

2 Description of the Subgrid Scale Model

3 Results

4 Discussion and Perspectives

References

On the Investigation of a Dynamic Nonlinear Subgrid- Scale Model

1 Introduction

2 Numerical Procedure

3 Results

4 Conclusion and Discussion

References

Three Problems in the Large–Eddy Simulation of Complex Turbulent Flows

1 An Algorithm for Large–Eddy Simulation of Compressible Turbulent Flows

2 RDT Applied to the Near–Wall Modeling Problem

3 Passive Scalar Mixing

Acknowledgments

References

Filtering the Wall as a Solution to the Wall- Modeling Problem

1 Introduction

2 Filtered Wall Formulation

3 Optimal Large Eddy Simulation

4 Filtered-Wall LES Results

5 Discussion

Acknowledgments

References

ANear- Wall Eddy- Viscosity Formulation for LES

1 Introduction

2 Near-Wall Treatment

3 Numerical Results

4 Application to Very High Reynolds Numbers

5 Conclusions

References

Investigation of Multiscale Subgrid Models for LES of Instabilities and Turbulence in Wake Vortex Systems

1 Introduction

2 Numerical Method

3 Simulation Results

4 Conclusions

Acknowledgments

References

Numerical Determination of the Scaling Exponent of the Modeled Subgrid Stresses for Eddy Viscosity Models

1 Introduction

2 Numerical Technique and Configuration

3 Evaluation of Modeling and Numerical Error

4 Results

5 Conclusions

References

A Posteriori Study on Modelling and Numerical Error in LES Applying the Smagorinsky Model

1 Introduction

2 Applied Modelling and Grid-Independent LES

3 Applied Numerical Methods and Grid Resolutions

4 Effect of Varying Grid Resolution on Numerical and Modelling Error

5 Effect of Varying Filter Width on Numerical and Modelling Error

6 Conclusions

Acknowledgments

References

Passive Scalar and Dissipation Simulations with the Linear Eddy Model

1 Introduction

2 Model Formulation

3 Results and Discussion

4 Conclusions

References

Lattice-Boltzmann LES of Vortex Shedding in the Wake of a Square Cylinder

1 Lattice-Boltzmann Method for Turbulent Flows

2 Square Cylinder Test Case

3 Square Cylinder Results

4 Computational Assessment of the Open Boundary Conditions

5 LBE-LES Stability

6 Conclusions

References

LES on Cartesian Grids with Anisotropic Refinement

1 Introduction

2 The Unstructured Solver: CDP

3 Grid Generation and Smoothing

4 Immersed Boundary Reconstruction

5 Turbulent Channel Flow

6 Sphere Calculations

7 Conclusions

Acknowledgments

References

Towards Time-Stable and Accurate LES on Unstructured Grids

1 Introduction

2 Consistency, Stability, & Accuracy

3 Unstructured Finite Volume Method

4 Numerical Results

5 Conclusions

References

A Low-Numerical Dissipation, Patch-Based Adaptive- Mesh- Refinement Method for Large- Eddy Simulation of Compressible Flows

1 Introduction

2 Numerical Method

3 Verification

4 Comparison with Experiments

5 Conclusions

Acknowledgments

References

Large-Eddy Simulation of Richtmyer-Meshkov Instability

1 Introduction

2 LES: Numerical Method and SGS Model

3 Initial and Boundary Conditions

4 Results

5 Concluding Remarks

Acknowledgments

References

LES of Variable Density Bifurcating Jets

1 Introduction

2 Governing Equations

3 Numerical Algorithm

4 Boundary Conditions

5 Results

6 Conclusions

Acknowledgments

References

Large-Eddy Simulation of a Turbulent Flow around a Multi- Perforated Plate

1 Introduction

2 Computational Methodology

3 Details of Numerical Simulations

4 Results and Discussion

5 Conclusions

Acknowledgments

References

Simulation of Separation from Curved Surfaces with Combined LES and RANS Schemes

1 Introduction

2 Outline of Methods

3 The Computational LES Framework

4 Application

5 Conclusions

Acknowledgments

References

Highly Parallel Large Eddy Simulations of Multiburner Configurations in Industrial Gas Turbines

1 Introduction

2 Target Configuration and LES Models

3 Computational Issues

4 Results and Discussion

5 Acoustic Description

6 Conclusions

Acknowledgments

References

Response of a Swirled Non-Premixed Burner to Fuel Flow Rate Modulation

1 Introduction

2 Numerical Approach

3 Computed Configuration

4 Non-Pulsated Cold & Reacting Cases

5 Pulsated Reacting Cases

6 Conclusion

Acknowledgments

References

Investigation of Subgrid Scale Wrinkling Models and Their Impact on the Artificially Thickened Flame Model in Large Eddy Simulations

1 Introduction

2 Modeling and Governing Equations

3 Oracles Configuration

4 Numerical Technique

5 Results and Discussion

6 Conclusions

Acknowledgments

References

Analysis of Premixed Turbulent Spherical Flame Kernels

1 Introduction

2 Numerical Approach and Physical Conditions

3 Results

4 Flamelet Analysis

5 Conclusions

Acknowledgments

References

Large Eddy Simulation of a Turbulent Ethylene/ Air Diffusion Flame

1 Introduction

2 Large Eddy Simulation

3 Numerical Simulation

4 Experimental Setup and Results

5 Conclusions

References

Energy Fluxes and Shell-to-Shell Transfers in MHD Turbulence

1 Introduction

2 Methodology

3 Numerical Results

4 Conclusions

Acknowledgments

References

Color Plates