Progress in Hybrid RANS-LES Modelling

Name: Progress in Hybrid RANS-LES Modelling | Papers Contributed to the 6th Symposium on Hybrid RANS-LES Methods, 26-28 September 2016, Strasbourg, France
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Papers Contributed to the 6th Symposium on Hybrid RANS-LES Methods, 26-28 September 2016, Strasbourg, France

Yannick Hoarau Shia-Hui Peng Dieter Schwamborn Alistair Revell(Herausgeber*in)

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Erschienen am 9. März 2018

X, 524 Seiten

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Inhalt

Intro
Preface
Contents
Invited Keynotes Papers
1 Attached and Detached Eddy Simulation
1 Motivation for ADES
2 Prospects for ADES
Progress in Hybrid Temporal LES
1 Introduction
2 Hybrid RANS/LES Formalism
2.1 Generalized Temporal Filter
2.2 Galilean Invariance
2.3 Consistency with Long-time Averaging
3 Modelling of the Subfilter Stresses in HTLES
3.1 Temporal PITM
3.2 A More Robust Hybrid Temporal LES Model
4 Non-stationary Turbulence: Hybrid URANS/TLES
4.1 URANS as a Temporally Filtered Approach
4.2 Hybridization of TLES and URANS
5 Conclusion
References
3 Stress-Blended Eddy Simulation (SBES)-A New Paradigm in Hybrid RANS-LES Modeling
1 Introduction
2 Shielding of RANS Boundary Layers
3 Stress-Blended Eddy Simulation (SBES)
4 Shielding of RANS Layer
5 Rapid RANS-LES Transition
6 Wall Modelled LES (WMLES) with SBES Models
7 Summary
References
Consistent Strain/Stress Lag Eddy-Viscosity Model for Hybrid RANS/LES
1 Introduction
2 Elliptic-Blending Lag Model
3 Extension of EBL to DES
4 Consistent RANS/LES Framework
5 Conclusions
References
5 Improved Delayed Detached-Eddy Simulations of Actively Controlled Flow
1 Introduction
2 Numerical Methods and Grid Generation
2.1 Flow Solver
2.2 Flow Configuration
2.2.1 Backward-facing Step
2.2.2 NACA0015 Airfoil
2.3 Computational Mesh
2.4 Numerical Setup and Parameters
3 Results and Discussions
3.1 Backward-facing Step
3.2 NACA0015 Airfoil
4 Conclusion
Acknowledgements
References
LES/SGS and Embedded LES
6 Effect of Upstream Turbulence on Single and Dual-Stream Jets. Assessment of Zonal Detached Eddy Simulation (ZDES)
1 Introduction
2 Zonal Detached Eddy Simulation (ZDES)
3 Single Stream Jet
3.1 Description of the Test Case and Simulations
3.2 Results
4 Dual-Stream Jet
4.1 Description of the Test Case and Simulations
4.2 Results
5 Summary and Conclusion
Acknowledgements
References
Implementation and Assessment of the Synthetic-Eddy Method in an Unstructured Compressible Flow Solver
1 Introduction
2 Synthetic Turbulence Methods
2.1 The Synthetic-Eddy Method (2006)
2.2 The Divergence-Free SEM (2011)
2.3 Implementation Aspects of SEM/DFSEM
3 Numerical Method
3.1 The Flow Solver DLR-TAU
3.2 Hybrid RANS/LES Modelling for Wall-Modelled LES
4 Test Cases and Results
4.1 Developing Flat-Plate Boundary Layer
4.2 2D-Hump Flow with Local Separation
4.3 Multi-Element Airfoil Near Stall
5 Conclusions
References
Hybrid RANS/LES Simulation Strategy for High-Lift Applications with Disturbed Inflow
1 Introduction
2 Simulation Setup
3 Results for the Steady Flow
4 Results of the Unsteady Vortex Interaction
5 Conclusion
References
Grey-Area Mitigation Using Commutation Terms at the Interfaces in Hybrid RANS-LES Modeling
1 Introduction
2 Modeling and Simulation Methods
2.1 Zonal Hybrid RANS-LES Model
2.2 Interface Formulation
3 Results
3.1 Fully Developed Channel Flow
3.2 Spatially Developing Turbulent Boundary Layer Flow
4 Conclusions
References
Scale-Resolving Simulations Based on a Lattice-Boltzmann Method
1 Introduction
2 Methodology
3 Examples
3.1 Shear Layer
3.2 Smooth Body Separation
3.3 Complex Geometry Separation
4 Conclusion and Outlook
References
Gas-Kinetic Scheme for Multiscale Turbulence Simulation
1 Introduction
2 Gas-Kinetic Scheme
3 Extended GKS for Turbulence Simulation
3.1 Validation of GKS-DES/IDDES
3.2 Validation of MS-GKS
4 Conclusions
References
Advances in HRLM (and Numerics Session)
12 Effects of Convection Schemes on Hybrid RANS-LES Calculations
1 Introduction
2 Computational Method
3 Results and Discussion
4 Conclusions
References
Application of a Stochastic Backscatter Model for Grey-Area Mitigation in Detached Eddy Simulations
1 Introduction
2 Stochastic Backscatter SGS Model
3 Delta Wing at High Angle of Attack
4 Three-Element Airfoil
5 Conclusions
References
On Scale-Resolving Simulation of Turbulent Flows Using Higher-Accuracy Quasi-1D Schemes on Unstructured Meshes
1 Introduction
2 Numerical Approach in General
2.1 Quasi-1D Scheme
2.2 Scheme for Arbitrary Non-isotropic Meshes
3 Application and Validation
3.1 Computational Setup
3.2 Results
4 Concluding Remarks
References
15 On the von Karman Length Scale as a Triggering Parameter in Eddy-Resolving Simulations of Turbulent Flows
1 Introduction
2 Computational Model
3 Results and Discussion
4 Conclusions
Acknowledgements
References
Recent Results with Grey-Area Improved DDES for a Wide Range of Flows
1 Introduction
2 Turbulence Modelling Approach
3 Results
4 Conclusions
References
Hybrid Simulation of High-Reynolds Number Flows Relying on a Variational Multiscale Model
1 Introduction and Motivations
2 Numerical Model
3 Turbulence Model: VMS-LES
4 Turbulence Model: RANS-DDES
5 Turbulence Model: Hybrid RANS/VMS-LES
6 Results
6.1 Circular Cylinder 3900-Subcritical
6.2 Circular Cylinder 20000-Subcritical
6.3 Tandem Cylinder
7 A Short Provisional Synthesis
References
Aerodynamics (with Turbines, Automotive, Highspeed Flow, Airfoil/BL, Wind Turbines)
Assessment of Scale-Resolving Simulations for Turbomachinery Applications
1 Introduction
2 Numerical Method
3 Modelling Approaches
4 Testcases
4.1 Circular Cylinder Mounted in a Square Channel
4.2 2D Streamwise-Periodic Channel with One Wall Having Hill-Shaped Features
4.3 Low-Speed Compressor Cascade with Tip Gap
5 Conclusion
References
19 Comparison of Hybrid RANS/LES Methods for Supersonic Combustion in a Model Scramjet Combustor
1 Introduction
2 Numerical Formulation
2.1 Governing Equations
2.2 Turbulence Modeling
2.3 Combustion Modelling
2.4 Spatial Discretization and Numerical Schemes
3 Results
3.1 Mach 4.5 Flows on Flat Plate
3.2 Description of Model Scramjet Combustor
3.3 Non-Reacting Flows in Model Scramjet Combustor
3.4 Reacting Flows in Model Scramjet Combustor
4 Conclusion
References
20 Computational Investigation of a Swirled Premixed Burner Using Hybrid RANS-LES Method
1 Introduction
2 Swirled Burner, Computational Domain and Mesh Generation
3 Computational Procedures
4 Results
4.1 Instantaneous Flow Field
4.2 Instantaneous Temperature Distribution
4.3 Validation with Experimental Measurements
4.4 Phase-Angle Analysis of the Flow Field
4.5 3D Flow and PVC
5 Summary and Conclusions
References
Assessment of Turbulence Models for Flow Around Three-Dimensional Geometries
1 Introduction
2 Test Cases
2.1 The Ahmed Body
2.2 The Japan Bulk Carrier
3 ISIS-CFD at Glance
4 Results
4.1 The Ahmed Body
4.2 The Japan Bulk Carrier
5 Conclusions
References
Comparison of Three Hybrid Turbulence Models for the Flow Around a 25° Ahmed Body
1 Introduction
2 Ahmed Body Geometry
3 Turbulence Models
3.1 Scale-Adaptive Simulation-SAS
3.2 Delayed Detached Eddy Simulation-DDES
3.3 Stress-Blended Eddy Simulation-SBES
4 Numerical Setup and Grid
5 Focus on Refinement Box
6 Numerical Results
7 Conclusions
References
23 Numerical Simulation of a 3-D Laminar Wing in Transonic Regime
1 Introduction
2 Test-Case Description, Numerical Parameters and Turbulence Modelling
3 Results
3.1 The Constant-Section V2C Wing
3.2 The Swept V2C Wing
4 Conclusion
Acknowledgements
References
Hybrid RANS-LES Study of Transonic Flow in the Wake of a Generic Space Launch Vehicle
1 Introduction
2 Simulation Setup
2.1 Grid Setup
3 Numerical Setup
3.1 Turbulence Modelling
4 Results
4.1 Azimuthal Size of the Simulation Domain
4.2 Assessment of the Unstructured Grid Approach
4.3 Comparison of the IDDES and Zonal DES Approach
5 Conclusion and Outlook
References
Detached Eddy Simulation of an SD7003 Airfoil
1 Introduction
2 Computational Setup
3 Results
4 Conclusions
References
26 Vortex Breakdown Flows Around a Double-Delta Wing During Pitching Motion Based on DDES
1 Introduction
2 Numerical Methods
2.1 N-S Equations Based on Rigid Moving Mesh Technique
2.2 Turbulence Modeling
2.3 Numerical Methodology
2.3.1 A Modified Adaptive Dissipation Scheme Based on S-TVD
2.3.2 Other Numerical Methodologies
3 Codes Validation
4 80°/65° Pitching DDW
4.1 Case Depiction
4.2 Unsteady Flows During Pitching Motion at K = 0.4
4.2.1 Dynamic Response of Burst Point
4.2.2 Evolution of Vortical Flows in One Pitching Period
4.2.3 Pressure Fluctuations and Helical Structures
4.2.4 Response of Aerodynamic Forces
5 Conclusions
Acknowledgements
References
On the Convection Velocity of Wall-Bounded Turbulence Resolved by ZDES Mode III at Re?= 13 000
1 Short Discussion of the Need and Options for Wall-Modelled Large Eddy Simulation in Applied Aerodynamics
2 A WMLES Strategy: Mode III of ZDES
3 Motivation, Definition and Visualisation of a High-Reynolds-Number Zero-Pressure-Gradient Flat-Plate Turbulent Boundary Layer Test Case
4 WMLES Prediction of Mean Skin Friction by ZDES
4.1 Accuracy, Resolution and Streamwise Evolution of Skin Friction
4.2 A Few Open Questions Related to the Logarithmic Layer
5 Resolved Spectral Convection Velocity at Re?= 13000
6 Outlook
References
Hybrid RANS/LES Simulation of a Supersonic Coaxial He/Air Jet Experiment at Various Turbulent Lewis Numbers
1 Introduction
2 Flusepa Solver
2.1 Turbulence Modeling
2.2 Numerical Scheme
3 Description of the Test Case
4 Simulation Results
5 Conclusion
References
Hybrid RANS/LES Simulation of a Space Launcher Using a High Order Finite Volume Scheme and Grid Intersections Technique
1 Introduction
2 Hybrid RANS/LES Model
2.1 Model Formulation
2.2 Attached RANS Boundary Layer
2.3 Convective Instabilities Departure
3 Hybrid Numerical Scheme for Hybrid RANS/LES Strategy
4 3D Grids Intersections for Complex Geometries
5 Ariane 5 Space Launcher Simulation
6 Conclusion
References
Detached-Eddy Simulation of a Horizontal Axis Wind Turbine
1 Introduction
2 Numerical Method and Geometry
3 Results and Discusion
3.1 Power Production
3.2 Vortical Structures
3.3 Constrained Streamlines and Pressure Contours
3.4 Pressure Distribution
4 Conclusions
References
Hybrid RANS/LES Capabilities of the Flow Solver FLOWer-Application to Flow Around Wind Turbines
1 Introduction
2 The CFD Solver FLOWer
3 Validation
3.1 Decaying Isotropic Turbulence
3.2 Backward Facing Step
3.3 NACA0021 at 60° Incidence
4 Flow Around the MEXICO Model Wind Turbine
4.1 Computational Setup
4.2 Results
5 Conclusions
References
Multi-disciplinary Analysis of Flow in Weapon Bays
1 Introduction
2 CFD Methodology
3 Time Frequency Analysis-Morlet Wavelet Method
4 Geometrical and Computational Model
5 Results and Discussion
5.1 Trajectory Variability
5.2 Cavity Flow Spatio-Temporal Fluctuations
6 Conclusions
References
Parametric Study of Cavity Leading-Edge Rod Spoilers by Advanced Hybrid RANS-LES Methods
1 Introduction
2 Numerical Methods
3 Geometry and Meshing
4 Results and Discussion
4.1 Rod Control Mechanism Analysis
4.2 Effects of Geometric Parameters of the Rod Spoiler
5 Concluding Remarks
References
Hybrid RANS-LES Turbulence Modelling in Aeroelastic Problems, Test Case 3 from the Second AIAA Aeroelastic Prediction Workshop
1 Introduction
2 Second AIAA Aeroelastic Prediction Workshop
3 Solvers, Computational Grids and Turbulence Modelling
4 Results
4.1 Test Case 3A: Free Flow Oscillations
4.2 Test Case 3B: Forced Oscillations
5 Conclusions
References
35 Improvement of CFD-Wind Tunnel Correlation Near Buffet Onset by Using Scale Resolving Simulations
1 Introduction
2 Experimental Setup Description
3 General Considerations Regarding the Simulation Methodology
4 Reference Results Using RANS
5 Results Using SRS Models
6 Conclusions and Way Forward
Acknowledgements
References
Applications (Remaining Sessions)
36 Numerical Simulations of the Flow Dynamics Past an Oscillating Rod-Airfoil Configuration
1 Introduction
2 Methods
3 Case Description and Validation
4 Results and Discussion
4.1 Instantaneous Flow Fields
4.2 Aerodynamic Results
4.3 The Relationships Between Forces and Flow-Fields
5 Conclusions
Acknowledgements
References
37 Modelled and Resolved Turbulent Stresses Around a Circular Cylinder Using DES
1 Introduction
1.1 Numerical Scheme
1.2 Detached Eddy Simulation (DES)
2 Modelled Reynolds Stress (Bradshaw's Formulation [2])
3 Resolved Turbulent Reynolds Stresses
4 Case Details
5 Results and Conclusion
5.1 Comparison of Modelled and Resolved Stresses
References
Numerical Study of 3D Turbulent Cavitating Flows
1 Introduction
2 The Code OpenFOAM
2.1 The Governing Equations
2.2 Numerics
3 The Compressible Code CaviFlow
3.1 Equations and Models
3.2 The Turbulence Model
3.3 Numerics
4 The Test Case
5 Computational Results
5.1 View of the Flow
5.2 Local Profiles Comparison
6 Conclusion
References
Hybrid LES/RANS Predictions of Flows and Acoustics from an Ultra-High-Bypass-Ratio Serrated Nozzle
1 Introduction
2 Methodology
2.1 Numerical Methods
2.2 Hybrid LES/RANS Modelling
2.3 Ffowcs Williams-Hawkings(FW-H) Method
3 Hybrid Meshing Strategy for Chevron Geometries
4 Results and Discussions
4.1 Validation on a Single Stream Hot Jet
4.2 Application to an UHBPR Serrated Nozzle Jet
5 Conclusions
References
Cross Flow Induced Vibration in a Single Tube of Square Array Using LES
1 Introduction
2 Configuration
3 Results and Analysis
3.1 Results Comparison with Experiments
3.2 Results Analysis
4 Conclusion
References
41 Experimental and Numerical Investigation of a Heated Impinging Jet for a Small Nozzle-to-Plate Distance and High Reynolds Number
1 Introduction
2 Experimental Dataset
3 Simulations
3.1 Parameters of the Simulations Performed
3.2 Pipe Exhaust Conditions
3.3 Jet Flow Development
3.4 Flow on the Impinged Plate
3.5 Near-Wall Quantities on the Impinged Plate
4 Summary and Conclusion
Acknowledgements
References
An Algebraic Hybrid RANS-LES Model with Application to Turbulent Heat Transfer
1 Introduction
2 Numerical Method
3 HRL Formulation
4 HRL Modeling
4.1 Base Model: Peng's HYB0
4.2 Proposed Form
5 Solver
6 Results and Discussion
7 Conclusion
References
43 Comparison of Hybrid RANS-LES Simulations of Turbulent Flow and Heat Transfer in a Ribbed Duct
1 Introduction
2 Test Case: A Flow in a Ribbed Duct
3 Computational Approach
4 Results and Discussion
4.1 Flow Characteristics
4.2 Heat Transfer Characteristics
5 Conclusion
References

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