Direct and Large Eddy Simulation XIII: Proceedings of DLES13 (ERCOFTAC Series, 31)

Contents
Bluff Bodies and Separated Flows
Dynamics of Turbulent Kinetic Energy Advection in a Turbulent Boundary Layer Under Unsteady Pressure Gradients
	1 Introduction
	2 Problem Definition
	3 Results
	4 Conclusions
	References
DNS of the Flow About a 5:1 Rectangular Body with Sharp Corners
	1 Introduction
	2 Numerical Methodology
	3 The Question of Spatial Discretization
	4 Results
		4.1 Velocity and Pressure Fields
		4.2 Passive Scalar Transport
	5 Conclusions
	References
In-Situ Analysis of Backflow Events and Their Relation to Separation in Wings Through Well-Resolved LES
	1 Introduction
	2 Methodology
	3 Results
	4 Conclusions
	References
Large-Eddy Simulations of the Accelerating Flow Around a Square Cylinder
	1 Introduction
	2 Problem Definition and Numerical Methodology
	3 Results and Discussion
	4 Conclusions
	References
DNS and POD Analysis of Separated Flow in a Three-Dimensional Diffuser
	1 Introduction
	2 Mathematical and Numerical Model
	3 Validation and Results
		3.1 Comparison with Experimental and DNS Data
		3.2 POD Analysis
	4 Conclusions
	References
Large-Eddy Simulations of the Flow Around Rectangular Cylinders of Different Chord-to-Depth Ratios: Impact of Upstream-Edge Sharpness
	1 Introduction
	2 Numerical Set-Up and Methodology
	3 Results and Discussion
	4 Conclusions
	References
Reynolds-Number Effects of Separating Flow over a Bump in Spanwise Rotating Channels
	1 Introduction
	2 Results and Discussion
	References
Convection and Heat/MassTransfer
Effect of Variable Density on Subgrid Scales
	1 Introduction
	2 The Subgrid Fluxes
	3 A Priori Analysis
	4 Conclusion
	References
DNS of Mass Transfer in Bi-dispersed Bubbly Flows in a Vertical Pipe
	1 Introduction
	2 Mathematical Formulation and Numerical Methods
	3 Numerical Experiments and Results
	4 Conclusions
	References
Application of LES to the Thermal–Hydraulics of Target Station 2 of the ISIS Muon and Neutron Source
	1 Introduction
	2 Numerical Models
	3 Results and Conclusions
	References
Modulation of Turbulence Flux Budgets by Varying Fluid Properties in Heated High Prandtl Number Flow
	1 Introduction
	2 Governing Equations and Numerical Setup
	3 Results
	4 Conclusions
	References
A Posteriori LES of Forced Convection Along Heated and Cooled Walls with Temperature-Dependent Fluid Properties
	1 Introduction
	2 Mathematical Formulation and Tested Sgs-Models
	3 Results
	4 Conclusions
	References
Industrial and Environmental Applications
Wind Gust-Induced Flutter of an Elastically Mounted Airfoil: A Fluid-Structure Interaction Study Based on LES
	1 Introduction
	2 Applied Methodology
	3 Test Case and Setup
	4 Results
	5 Conclusions
	References
Euler-Lagrange LES Predictions of a Powder Disperser Including a Multiscale Wall-Impact Breakage Model
	1 Introduction
	2 Applied Methodology
	3 ANN-Based Wall-Impact Breakage Model
	4 Results for the Particle-Laden Flow in a Dry Powder Disperser
	5 Conclusions
	References
A Four Mixture Fraction FPV-LES for the Co-firing of Coal and Ammonia
	1 Introduction
	2 Flamelet Modeling
	3 Flame and Numerical Setup
	4 Results
	5 Conclusion
	References
Large Eddy Simulation of a Low Pressure Turbine Cascade with Turbulent End Wall Boundary Layers
	1 Introduction
	2 Numerical Method
	3 Inflow Boundary Conditions
	4 Validation and Analysis of Flow Structures
	5 Conclusions
	References
Modelling SGS-Turbulent Transport of Fine Particles with Application to Cyclone Separator Performance
	1 Introduction
	2 Summary of Numerical Approach
	3 Cyclone Discretisation and Boundary Conditions
	4 Results Cyclone Separator
	5 Conclusions
	References
Direct and Large–Eddy Simulation of Turbulent Oscillatory Flow Through a Hexagonal Sphere Pack
	1 Introduction
	2 Methodology
		2.1 Numerical Method
		2.2 Domain and Grid
		2.3 Turbulence Statistics
	3 Results
		3.1 Superficial Velocity
		3.2 Instantaneous Velocity Fields
		3.3 Mean and Turbulent Kinetic Energy
		3.4 Relation Between Kinetic Energy and Dissipation Rate
	4 Conclusion
	References
High-Fidelity Large-Eddy Simulation of a Pulsed Jet Actuator
	1 Introduction
	2 Flow Solver and Computational Setup
	3 Results
	4 Conclusion
	References
Internal and External Aerodynamics
Transition and Acoustic Excitation of Stenotic Pipe Flows at Different Reynolds Numbers
	1 Introduction
	2 Numerical Methods
	3 Flow Configuration
	4 Results
	5 Conclusion
	References
Leading-Edge Effects in Freestream Turbulence Induced Transition in a Dense Gas Flow
	1 Introduction
	2 Numerical Methods and Set-Up
	3 Results
	4 Conclusions
	References
Transition Prediction on a Wind Turbine Blade at Re = 106 Under Varying Inflow Turbulence Based on Wall-Resolved LES
	1 Introduction
	2 Applied Methodology
	3 Results and Discussion
	4 Conclusions
	References
Laminar-Turbulent Transition in Swept-Wing Flows with a Supercritical Forward-Facing Step
	1 Introduction
	2 Flow Problem and DNS Setup
	3 Steady Perturbation Evolution
	4 Unsteady Perturbation Evolution
	References
Analysis of a Transonic Cascade with Wall-Modeled LES Based on DGSEM
	1 Introduction
	2 Numerical Method
	3 Results
		3.1 Turbulent Channel Flow
		3.2 Transonic Compressor Cascade
	4 Conclusion
	References
Numerical Investigation of the Transonic Non-ideal Gas Flow Around a Circular Cylinder at High Reynolds Number
	1 Introduction
	2 Methods
	3 Results and Discussion
	4 Conclusions
	References
Turbulent Boundary Layer in a 3-Element High-Lift Wing: Coherent Structures Identification
	1 Introduction
	2 Numerical Method
	3 Results
		3.1 Boundary Layer Development at Main Suction Side
		3.2 POD Analysis
	4 Conclusions
	References
Aeroacoustic Source Terms from Turbulent Flow Through a 90 Pipe Bend Predicted by Large-Eddy Simulation
	1 Introduction
	2 Simulation Setup
	3 Simulation Results
		3.1 Flow Field
		3.2 Acoustic Simulation and Comparison Against Measurements
	4 Conclusions
	References
The Effect of Wing-Tip Vortices on the Flow Around a NACA0012 Wing
	1 Introduction
	2 Numerical Method
	3 Results and Discussion
	4 Summary and Conclusion
	References
LES Modeling and Hybrid LES-RANS
Subgrid-Scale Modeling for Remeshed Vortex Methods
	1 Introduction
	2 Remeshed Vortex Methods
	3 Turbulence Modeling
	4 Numerical Experiments
	5 Conclusion and Perspectives
	References
Wavelet-based Adaptive LES for Compressible Flows
	1 Introduction
	2 Compressible WA-LES
	3 Channel Flow Simulation
	4 Concluding Remarks
	References
High-Reynolds Compressible Flows Simulation with Wall-Modeled LES and Immersed Boundary Method
	1 Introduction
	2 Governing Equation and Numerical Methods
	3 Results
		3.1 Turbulent Channel with Immersed Walls
		3.2 Turbulent Pipe Inside an Immersed Block
	4 Conclusions
	References
Stochastic Data-Driven POD-Based Modeling for High-Fidelity Coarsening of Two-Dimensional Rayleigh-Bénard Turbulence
	1 Introduction
	2 Data Generation and Processing
	3 Stochastic Modelling
		3.1 Model Description
		3.2 Nusselt Number Predictions
	4 Conclusions
	References
Boundary Conditions for Wall-Modelled Large-Eddy Simulation Using Spectral Element Discretization
	1 Introduction
	2 Wall Boundary Conditions
		2.1 Subgrid Scale Modelling
	3 Case Setup
	4 Results
	5 Conclusions
	References
Structural Models for Particles in LES: Assessment Through the Subfilter Enstrophy Field
	1 Introduction
	2 A Priori LES and Multifractal Model
	3 Results: SGS Enstrophy
	4 Conclusion
	References
DNS-Based Turbulent Closures for Sediment Transport Using Symbolic Regression
	1 Introduction
	2 RANS Model
	3 Setup and DNS Data
	4 SpaRTA Approach
	5 Cross-Validation
	6 Conclusions
	References
Uncertainty Quantification of LES for Buoyancy-Driven Mixing Processes Using PCE-HDMR
	1 Introduction
	2 Methods
		2.1 CFD Methods
		2.2 UQ Methods
	3 Results
	4 Conclusions
	References
Multiphase and Reactive Flows
DNS of Drag Reduction in Dispersed Bubbly Taylor-Couette Turbulence
	1 Introduction
	2 Computational Model
	3 Bubbly Taylor-Couette Turbulence
	References
Analysis of Turbulent Kinetic Energy Budgets in Co-current Taylor Bubble Flow
	1 Introduction
	2 Model and Simulation Setup
	3 Results
	4 Conclusions
	References
Taylor Bubble Breakup in Counter-Current Turbulent Flow Using Algebraic and Geometric Volume of Fluid Method
	1 Introduction
	2 Simulation of Taylor Bubble in Turbulent Counter-Current Flow
	3 Results
	4 Summary
	References
Turbulent Kinetic Energy Budget in Turbulent Flow of a Dilute Polymer Solution
	1 Introduction
	2 Methodology
	3 Results
	4 Conclusion
	References
Elongated Non-spherical Particles in Turbulent Channel Flow Using Euler/Lagrange Approach
	1 Introduction
	2 Numerical Modelling
	3 Simulation Setup and Results
	4 Conclusions
	References
DNS of Magnetic Density Separation in the Wake of a Honeycomb
	1 Introduction
	2 Governing Equations and Numerical Methods
	3 Results and Conclusions
	References
Volume Conservation Methods for VOF-Based Long-Term Simulations of Turbulent Bubble-Laden Flows on Coarse Grids
	1 Introduction
	2 Numerical Method and Flow Configuration
	3 Volume Conservation: Background and Methods
	4 Results
	5 Conclusions
	References
Hydrogen Jet Flame Global Instabilities and Their Control Using Suction
	1 Introduction
	2 Computations
	3 Results
	4 Conclusions
	References
Numerical Methods
Improved Evaluation of Subfilter Stresses Using Approximate Deconvolution of Implicit Filters Induced by Numerical Schemes
	1 Introduction
	2 Approximate Deconvolution of Induced Filters
	3 Homogeneous Turbulence: Spectral and Vorticity Dynamics
	4 Conclusions
	References
Seamless Interface Methods for Grey-Area Mitigation in Scale-Resolving Hybrid RANS-LES
	1 Introduction
	2 Mathematical Formulation
	3 Numerical Setup
	4 Results and Discussion
		4.1 Mixing Shear Layer
	5 Conclusions
	References
On a Conservative Solution to Checkerboarding: Examining the Discrete Laplacian Kernel Using Mesh Connectivity
	1 Introduction
	2 Relation Between the Mesh and the Kernel
	3 Conslusions
	References
Finite-Difference Viscous Filtering for Non-regular Meshes
	1 Introduction
	2 Methodology
	3 Validation for Burger\'s Equation
	4 Assessment by Implicit LES
	5 Conclusion
	References
An Energy-Preserving Unconditionally Stable Fractional Step Method for DNS/LES on Collocated Unstructured Grids
	1 Introduction
	2 An Energy-Preserving Unconditionally Stable FSM
		2.1 Conservation of Energy
		2.2 Stability of the Pressure Gradient Interpolation
	3 Test Case: Turbulent Channel Flow at Re=395
		3.1 Accuracy of the Interpolator in High Quality Meshes
		3.2 Robustness in Distorted Meshes
	4 Conclusions and Future Work
	References
DNS and LES of Buoyancy-Driven Turbulence at High Rayleigh Numbers: Numerical Methods and Subgrid-Scale Models
	1 Introduction
	2 LES of Buoyancy-Driven Turbulence
	3 Numerical Methods and Algorithms for Large-Scale Simulations on Modern Supercomputers
	4 First Results and Conclusions
	References
Turbulent Flows
New Insights on Buoyancy-Driven Turbulent Flows
	1 Introduction
	2 Numerical Methodology
	3 Background
	4 Results
		4.1 Plume Dynamics
	5 Conclusions
	References
Assessment of the Effect of the Surface Tension Contribution on the Emulsification in Linearly Forced Turbulence
	1 Introduction
	2 Governing Equations and Computational Method
	3 Numerical Setup and Configuration
	4 Results
	5 Conclusion and Outlook
	References
Reynolds Number Dependency of Turbulent Flow over a Surface Fouled by Barnacles
	1 Introduction
	2 Methodology
	3 Results
	4 Conclusions
	References
A Turbulent Plume in Crossflow
	1 Introduction
	2 Statement of the Problem
	3 Direct Numerical Simulation
	4 Instantaneous and Mean Flow
	5 Turbulent Energy
	6 Conclusions and Perspectives
	References
Direct Numerical Simulations of Turbulent Flow in Helical Pipes
	1 Introduction
	2 Numerical Method
		2.1 Driving Force
		2.2 Validation
	3 Fully Developed Turbulent Flow
	4 Conclusions and Outlook
	References
Wall-Modelled Large-Eddy Simulations of Flows with Non-uniform Roughness
	1 Introduction
	2 Methodology
	3 Results
	4 Conclusions
	References
Direct Numerical Simulation of Scalar Transport Across the Interface Between a Porous Medium and a Turbulent Flow
	1 Introduction
	2 Methods
	3 Results and Discussion
	4 Conclusion
	References
Influence of Ridge Spacing on Secondary Currents in Turbulent Channel Flow over Triangular Ridges
	1 Introduction
	2 Methodology
	3 Results
	4 Conclusions
	References
Author Index