Complex Effects in Large Eddy Simulations (eBook)

Stavros Kassinos, Carlos Langer, Gianluca Iaccarino, Parviz Moin (Herausgeber)

eBook Download: PDF

2007
XI, 446 Seiten
Springer Berlin (Verlag)
978-3-540-34234-2 (ISBN)

Infos

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.

Inhalt

Preface 6
Contents 8
Complex Effects in Large Eddy Simulations 11
1 Introduction 11
2 Numerical Methods 13
3 Wall Modeling 13
4 Two-Phase Flows 15
5 Integration 17
6 Novel Applications of LES 19
7 Conclusions 21
Acknowledgments 23
References 23
On the Relation between Subgrid-Scale Modeling and Numerical Discretization in Large- Eddy Simulation 25
1 Introduction 25
2 The ALDM Approach 28
3 Isotropic Turbulence 30
4 Plane-Channel Flow with Periodic Constrictions 32
5 Conclusions 34
Acknowledgments 35
References 35
Space-Time Error Representation and Estimation in Navier- Stokes Calculations 38
1 Introduction 38
2 Error Estimation of Functionals 42
3 Computable Error Estimates and Adaptivity 46
4 Extension to the Time-Dependent Navier-Stokes Equations 50
5 Concluding Remarks 55
References 55
Multiresolution Particle Methods 58
1 Introduction 58
2 Approximations using Particles 60
3 Solving Transport Problems with Particle Methods 61
4 Adaptive Particle Methods 63
5 Conclusions 68
References 69
LES Computation of Lagrangian Statistics in Homogeneous Stationary Turbulence Application of Universalities under Scaling Symmetry at Sub- Grid Scales
1 Introduction 71
2 Universalities of Fragmentation under the Scaling Symmetry and Turbulent Cascade with Intermittency 73
3 Computational Model 74
4 Numerical Results and Discussion 76
5 Conclusions 79
References 81
Anisotropic Subgrid-Scale Modelling: Comparison of LES with High Resolution DNS and Statistical Theory for Rapidly Rotating Turbulence 84
1 Introduction 84
2 Description of the Subgrid Scale Model 85
3 Results 87
4 Discussion and Perspectives 92
References 95
On the Investigation of a Dynamic Nonlinear Subgrid- Scale Model 96
1 Introduction 96
2 Numerical Procedure 97
3 Results 99
4 Conclusion and Discussion 104
References 104
Three Problems in the Large–Eddy Simulation of Complex Turbulent Flows 105
1 An Algorithm for Large–Eddy Simulation of Compressible Turbulent Flows 105
2 RDT Applied to the Near–Wall Modeling Problem 110
3 Passive Scalar Mixing 116
Acknowledgments 120
References 120
Filtering the Wall as a Solution to the Wall- Modeling Problem 122
1 Introduction 122
2 Filtered Wall Formulation 123
3 Optimal Large Eddy Simulation 126
4 Filtered-Wall LES Results 127
5 Discussion 128
Acknowledgments 130
References 130
ANear- Wall Eddy- Viscosity Formulation for LES 132
1 Introduction 132
2 Near-Wall Treatment 133
3 Numerical Results 134
4 Application to Very High Reynolds Numbers 141
5 Conclusions 144
References 144
Investigation of Multiscale Subgrid Models for LES of Instabilities and Turbulence in Wake Vortex Systems 146
1 Introduction 146
2 Numerical Method 147
3 Simulation Results 152
4 Conclusions 158
Acknowledgments 160
References 160
Numerical Determination of the Scaling Exponent of the Modeled Subgrid Stresses for Eddy Viscosity Models 165
1 Introduction 165
2 Numerical Technique and Configuration 166
3 Evaluation of Modeling and Numerical Error 168
4 Results 169
5 Conclusions 173
References 174
A Posteriori Study on Modelling and Numerical Error in LES Applying the Smagorinsky Model 177
1 Introduction 177
2 Applied Modelling and Grid-Independent LES 178
3 Applied Numerical Methods and Grid Resolutions 181
4 Effect of Varying Grid Resolution on Numerical and Modelling Error 182
5 Effect of Varying Filter Width on Numerical and Modelling Error 185
6 Conclusions 190
Acknowledgments 193
References 193
Passive Scalar and Dissipation Simulations with the Linear Eddy Model 194
1 Introduction 194
2 Model Formulation 195
3 Results and Discussion 197
4 Conclusions 204
References 204
Lattice-Boltzmann LES of Vortex Shedding in the Wake of a Square Cylinder 206
1 Lattice-Boltzmann Method for Turbulent Flows 206
2 Square Cylinder Test Case 210
3 Square Cylinder Results 211
4 Computational Assessment of the Open Boundary Conditions 212
5 LBE-LES Stability 217
6 Conclusions 218
References 219
LES on Cartesian Grids with Anisotropic Refinement 221
1 Introduction 221
2 The Unstructured Solver: CDP 223
3 Grid Generation and Smoothing 225
4 Immersed Boundary Reconstruction 228
5 Turbulent Channel Flow 231
6 Sphere Calculations 232
7 Conclusions 233
Acknowledgments 234
References 234
Towards Time-Stable and Accurate LES on Unstructured Grids 236
1 Introduction 236
2 Consistency, Stability, & Accuracy
3 Unstructured Finite Volume Method 241
4 Numerical Results 244
5 Conclusions 248
References 249
A Low-Numerical Dissipation, Patch-Based Adaptive- Mesh- Refinement Method for Large- Eddy Simulation of Compressible Flows 251
1 Introduction 251
2 Numerical Method 252
3 Verification 255
4 Comparison with Experiments 257
5 Conclusions 260
Acknowledgments 261
References 261
Large-Eddy Simulation of Richtmyer-Meshkov Instability 263
1 Introduction 263
2 LES: Numerical Method and SGS Model 264
3 Initial and Boundary Conditions 265
4 Results 266
5 Concluding Remarks 269
Acknowledgments 270
References 270
LES of Variable Density Bifurcating Jets 272
1 Introduction 272
2 Governing Equations 274
3 Numerical Algorithm 275
4 Boundary Conditions 277
5 Results 278
6 Conclusions 285
Acknowledgments 285
References 285
Large-Eddy Simulation of a Turbulent Flow around a Multi- Perforated Plate 288
1 Introduction 288
2 Computational Methodology 290
3 Details of Numerical Simulations 293
4 Results and Discussion 293
5 Conclusions 300
Acknowledgments 300
References 301
Simulation of Separation from Curved Surfaces with Combined LES and RANS Schemes 303
1 Introduction 303
2 Outline of Methods 306
3 The Computational LES Framework 307
4 Application 308
5 Conclusions 320
Acknowledgments 321
References 321
Highly Parallel Large Eddy Simulations of Multiburner Configurations in Industrial Gas Turbines 323
1 Introduction 323
2 Target Configuration and LES Models 324
3 Computational Issues 324
4 Results and Discussion 326
5 Acoustic Description 331
6 Conclusions 332
Acknowledgments 333
References 333
Response of a Swirled Non-Premixed Burner to Fuel Flow Rate Modulation 335
1 Introduction 335
2 Numerical Approach 337
3 Computed Configuration 337
4 Non-Pulsated Cold & Reacting Cases
5 Pulsated Reacting Cases 341
6 Conclusion 346
Acknowledgments 346
References 347
Investigation of Subgrid Scale Wrinkling Models and Their Impact on the Artificially Thickened Flame Model in Large Eddy Simulations 350
1 Introduction 350
2 Modeling and Governing Equations 352
3 Oracles Configuration 354
4 Numerical Technique 356
5 Results and Discussion 357
6 Conclusions 363
Acknowledgments 363
References 364
Analysis of Premixed Turbulent Spherical Flame Kernels 367
1 Introduction 367
2 Numerical Approach and Physical Conditions 369
3 Results 371
4 Flamelet Analysis 375
5 Conclusions 378
Acknowledgments 378
References 378
Large Eddy Simulation of a Turbulent Ethylene/ Air Diffusion Flame 380
1 Introduction 380
2 Large Eddy Simulation 382
3 Numerical Simulation 387
4 Experimental Setup and Results 388
5 Conclusions 393
References 393
Energy Fluxes and Shell-to-Shell Transfers in MHD Turbulence 395
1 Introduction 395
2 Methodology 396
3 Numerical Results 400
4 Conclusions 403
Acknowledgments 405
References 406
Color Plates 407

Produkt-Details

• Erscheint lt. Verlag: 16.7.2007
• Reihe/Serie: Lecture Notes in Computational Science and Engineering
• Reihe/Serie: Lecture Notes in Computational Science and Engineering
• Zusatzinfo: XI, 446 p. 292 illus., 51 illus. in color.
• Verlagsort: Berlin
• Sprache: englisch
• Themenwelt: Informatik ► Theorie / Studium ► Künstliche Intelligenz / Robotik
• Themenwelt: Mathematik / Informatik ► Mathematik ► Wahrscheinlichkeit / Kombinatorik
• Themenwelt: Technik ► Maschinenbau
• Schlagworte: aero-acoustics and aero-optics • Calculus • combustion and multiphase turbulent flows • complex geometries and unstructured grids • compressible flows and shocks • environmental and geophysical flows • Lattice-Boltzmann methods • MHD and plasma flows • Modeling • multiresolution particle methods • near-wall modeling and RAN-LES integration • Simulation • stability • Statistics • validat
• ISBN-10: 3-540-34234-6 / 3540342346
• ISBN-13: 978-3-540-34234-2 / 9783540342342