Ebook: Advances in LES of Complex Flows: Proceedings of the Euromech Colloquium 412, held in Munich, Germany 4–6 October 2000
- Tags: Engineering Fluid Dynamics, Simulation and Modeling, Classical Continuum Physics
- Series: Fluid Mechanics and Its Applications 65
- Year: 2004
- Publisher: Springer Netherlands
- Edition: 1
- Language: English
- pdf
The articles focus on new developments in the field of large-eddy simulation of complex flows and are related to the topics: modelling and analysis of subgrid scales, numerical issues in LES cartesian grids for complex geometries, curvilinear and non-structured grids for complex geometries. DES and RANS-LES coupling, aircraft wake vortices, combustion and magnetohydrodynamics.
Progress has been made not only in understanding and modelling the dynamics of unresolved scales, but also in designing means that prevent the contamination of LES predictions by discretization errors. Progress is reported as well on the use of cartesian and curvilinear coordinates to compute flow in and around complex geometries and in the field of LES with unstructured grids. A chapter is dedicated to the detached-eddy simulation technique and its recent achievements and to the promising technique of coupling RANS and LES solutions in order to push the resolution-based Reynolds number limit of wall-resolving LES to higher values.
Complexity due to physical mechanisms links the last two chapters. It is shown that LES constitutes the tool to analyse the physics of aircraft wake vortices during landing and takeoff. Its thorough understanding is a prerequisite for reliable predictions of the distance between consecutive landing airplanes. Subgrid combustion modelling for LES of single and two-phase reacting flows is demonstrated to have the potential to deal with finite-rate kinetics in high Reynolds number flows of full-scale gas turbine engines. Fluctuating magnetic fields are more reliably predicted by LES when tensor-diffusivity rather than gradient-diffusion models are used. An encouraging result in the context of turbulence control by magnetic fields.
The articles focus on new developments in the field of large-eddy simulation of complex flows and are related to the topics: modelling and analysis of subgrid scales, numerical issues in LES cartesian grids for complex geometries, curvilinear and non-structured grids for complex geometries. DES and RANS-LES coupling, aircraft wake vortices, combustion and magnetohydrodynamics.
Progress has been made not only in understanding and modelling the dynamics of unresolved scales, but also in designing means that prevent the contamination of LES predictions by discretization errors. Progress is reported as well on the use of cartesian and curvilinear coordinates to compute flow in and around complex geometries and in the field of LES with unstructured grids. A chapter is dedicated to the detached-eddy simulation technique and its recent achievements and to the promising technique of coupling RANS and LES solutions in order to push the resolution-based Reynolds number limit of wall-resolving LES to higher values.
Complexity due to physical mechanisms links the last two chapters. It is shown that LES constitutes the tool to analyse the physics of aircraft wake vortices during landing and takeoff. Its thorough understanding is a prerequisite for reliable predictions of the distance between consecutive landing airplanes. Subgrid combustion modelling for LES of single and two-phase reacting flows is demonstrated to have the potential to deal with finite-rate kinetics in high Reynolds number flows of full-scale gas turbine engines. Fluctuating magnetic fields are more reliably predicted by LES when tensor-diffusivity rather than gradient-diffusion models are used. An encouraging result in the context of turbulence control by magnetic fields.
The articles focus on new developments in the field of large-eddy simulation of complex flows and are related to the topics: modelling and analysis of subgrid scales, numerical issues in LES cartesian grids for complex geometries, curvilinear and non-structured grids for complex geometries. DES and RANS-LES coupling, aircraft wake vortices, combustion and magnetohydrodynamics.
Progress has been made not only in understanding and modelling the dynamics of unresolved scales, but also in designing means that prevent the contamination of LES predictions by discretization errors. Progress is reported as well on the use of cartesian and curvilinear coordinates to compute flow in and around complex geometries and in the field of LES with unstructured grids. A chapter is dedicated to the detached-eddy simulation technique and its recent achievements and to the promising technique of coupling RANS and LES solutions in order to push the resolution-based Reynolds number limit of wall-resolving LES to higher values.
Complexity due to physical mechanisms links the last two chapters. It is shown that LES constitutes the tool to analyse the physics of aircraft wake vortices during landing and takeoff. Its thorough understanding is a prerequisite for reliable predictions of the distance between consecutive landing airplanes. Subgrid combustion modelling for LES of single and two-phase reacting flows is demonstrated to have the potential to deal with finite-rate kinetics in high Reynolds number flows of full-scale gas turbine engines. Fluctuating magnetic fields are more reliably predicted by LES when tensor-diffusivity rather than gradient-diffusion models are used. An encouraging result in the context of turbulence control by magnetic fields.
Content:
Front Matter....Pages i-xxii
On the Physical Effects of Variable Filtering lengths and times in LES....Pages 3-11
How Can We Make LES to Fulfill Its Promise?....Pages 13-32
The Approximate Deconvolution Model for Compressible Flows: Isotropic Turbulence and Shock-Boundary-Layer Interaction....Pages 33-47
A New Mixed Model Based on the Velocity Structure Function....Pages 49-64
On the Effect of Coherent Structures on Grid/Subgrid-Scale Interactions in Plane Jets: The Transition and Far Field Regions....Pages 65-80
Phase-Error Reduction in Large-Eddy Simulation Using a Compact Scheme....Pages 83-98
DNS and LES of Turbulent Backward-Facing Step Flow Using 2ND-and 4TH-Order Discretization....Pages 99-114
Parallel Multi-Domain Large-Eddy Simulation of the Flow Over a Backward-Facing Step at RE=5100....Pages 115-130
LES of Flow around a Circular Cylinder at a Subcritical Reynolds Number with Cartesian Grids....Pages 133-150
A Numerical Wind Tunnel Experiment....Pages 151-162
Towards Large Eddy Simulation of Complex Flows....Pages 165-183
Structured and Non-Structured Large Eddy Simulations of the Ahmed Reference Model....Pages 185-198
Large Eddy Simulation of Fluid Flow and Heat Transfer around a Matrix of Cubes, using Unstructured Grids....Pages 199-216
Large Eddy Simulation for Flow Analysis in a Centrifugal Pump Impeller....Pages 217-232
Detached-Eddy Simulation, 1997–2000....Pages 235-237
Physical and Numerical Upgrades in the Detached-Eddy Simulation of Complex Turbulent Flows....Pages 239-254
Detached and Large Eddy Simulation of Airfoil Flow on Semi-Structured Grids....Pages 255-272
A Multidomain/Multiresolution Method with Application to Rans-Les Coupling....Pages 273-290
Aircraft Wake Vortex Evolution and Decay in Idealized and Real Environments: Methodologies, Benefits and Limitations....Pages 293-309
Vles of Aircraft Wake Vortices in a Turbulent Atmosphere: A Study of Decay....Pages 311-326
Subgrid Combustion Modeling for LES of Single and two-Phase Reacting Flows....Pages 329-351
Experimental Study of the Filtered Progress Variable Approach for LES of Premixed Combustion....Pages 353-366
Three-Dimensional Large-Eddy Simulation of Decaying Magnetohydrodynamic Turbulence....Pages 367-378
The articles focus on new developments in the field of large-eddy simulation of complex flows and are related to the topics: modelling and analysis of subgrid scales, numerical issues in LES cartesian grids for complex geometries, curvilinear and non-structured grids for complex geometries. DES and RANS-LES coupling, aircraft wake vortices, combustion and magnetohydrodynamics.
Progress has been made not only in understanding and modelling the dynamics of unresolved scales, but also in designing means that prevent the contamination of LES predictions by discretization errors. Progress is reported as well on the use of cartesian and curvilinear coordinates to compute flow in and around complex geometries and in the field of LES with unstructured grids. A chapter is dedicated to the detached-eddy simulation technique and its recent achievements and to the promising technique of coupling RANS and LES solutions in order to push the resolution-based Reynolds number limit of wall-resolving LES to higher values.
Complexity due to physical mechanisms links the last two chapters. It is shown that LES constitutes the tool to analyse the physics of aircraft wake vortices during landing and takeoff. Its thorough understanding is a prerequisite for reliable predictions of the distance between consecutive landing airplanes. Subgrid combustion modelling for LES of single and two-phase reacting flows is demonstrated to have the potential to deal with finite-rate kinetics in high Reynolds number flows of full-scale gas turbine engines. Fluctuating magnetic fields are more reliably predicted by LES when tensor-diffusivity rather than gradient-diffusion models are used. An encouraging result in the context of turbulence control by magnetic fields.
Content:
Front Matter....Pages i-xxii
On the Physical Effects of Variable Filtering lengths and times in LES....Pages 3-11
How Can We Make LES to Fulfill Its Promise?....Pages 13-32
The Approximate Deconvolution Model for Compressible Flows: Isotropic Turbulence and Shock-Boundary-Layer Interaction....Pages 33-47
A New Mixed Model Based on the Velocity Structure Function....Pages 49-64
On the Effect of Coherent Structures on Grid/Subgrid-Scale Interactions in Plane Jets: The Transition and Far Field Regions....Pages 65-80
Phase-Error Reduction in Large-Eddy Simulation Using a Compact Scheme....Pages 83-98
DNS and LES of Turbulent Backward-Facing Step Flow Using 2ND-and 4TH-Order Discretization....Pages 99-114
Parallel Multi-Domain Large-Eddy Simulation of the Flow Over a Backward-Facing Step at RE=5100....Pages 115-130
LES of Flow around a Circular Cylinder at a Subcritical Reynolds Number with Cartesian Grids....Pages 133-150
A Numerical Wind Tunnel Experiment....Pages 151-162
Towards Large Eddy Simulation of Complex Flows....Pages 165-183
Structured and Non-Structured Large Eddy Simulations of the Ahmed Reference Model....Pages 185-198
Large Eddy Simulation of Fluid Flow and Heat Transfer around a Matrix of Cubes, using Unstructured Grids....Pages 199-216
Large Eddy Simulation for Flow Analysis in a Centrifugal Pump Impeller....Pages 217-232
Detached-Eddy Simulation, 1997–2000....Pages 235-237
Physical and Numerical Upgrades in the Detached-Eddy Simulation of Complex Turbulent Flows....Pages 239-254
Detached and Large Eddy Simulation of Airfoil Flow on Semi-Structured Grids....Pages 255-272
A Multidomain/Multiresolution Method with Application to Rans-Les Coupling....Pages 273-290
Aircraft Wake Vortex Evolution and Decay in Idealized and Real Environments: Methodologies, Benefits and Limitations....Pages 293-309
Vles of Aircraft Wake Vortices in a Turbulent Atmosphere: A Study of Decay....Pages 311-326
Subgrid Combustion Modeling for LES of Single and two-Phase Reacting Flows....Pages 329-351
Experimental Study of the Filtered Progress Variable Approach for LES of Premixed Combustion....Pages 353-366
Three-Dimensional Large-Eddy Simulation of Decaying Magnetohydrodynamic Turbulence....Pages 367-378
....