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E-raamat: Progress in Hybrid RANS-LES Modelling: Papers Contributed to the 3rd Symposium on Hybrid RANS-LES Methods, Gdansk, Poland, June 2009

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Hybrid modelling of turbulent flows, combining RANS and LES techniques, has received increasing attention over the past decade to fill the gap between (U)RANS and LES computations in aerodynamic applications at industrially relevant Reynolds numbers. With the advantage of hybrid RANS-LES modelling approaches, being considerably more computationally efficient than full LES and more accurate than (U)RANS, particularly for unsteady aerodynamic flows, has motivated numerous research and development activities. These activities have been increasingly stimulated by the provision of modern computing facilities. The present book contains the contributions presented at the Third Symposium on Hybrid RANS-LES Methods, held in Gdansk, Poland, 10-12 June 2009. To a certain extent, this conference was a continuation of the first symposium taking place in Stockholm (Sweden, 2005) and the second in Corfu (Greece, 2007). Motivated by the extensive interest in the research community, the papers presented at the Corfu symposium were published by Springer in the book entitled “Advances in Hybrid RANS-LES Modelling” (in Notes on Numerical Fluid Mechanics and Multidisciplinary Design, Vol. 97). At the Gdansk symposium, along with four invited keynotes, given respectively by S. Fu, U. Michel, M. Sillen and P. Spalart, another 28 papers were presented on the following topics: Unsteady RANS, LES, Improved DES Methods, Hybrid RANS-LES Methods, DES versus URANS and other Hybrid Methods, Modelli- related Numerical Issues and Industrial Applications. After the symposium all full papers have been further reviewed and revised for publication in the present book.
Hybrid RANS-LES Modelling: How to Proceed? The Round Table Forum
Discussion.- Hybrid RANS-LES Modelling: How to Proceed? The Round Table Forum
Discussion.- Invited Keynote Papers.- Reflections on RANS Modelling.- Flow
Modelling in Aircraft Design An Engineering Perspective.- Investigation of
Practical Flow Control Methodologies with RANS/LES Hybrid Methods.- Advanced
DES Methods and Their Application to Aeroacoustics.- DES Modelling Approach
and Its Variants.- Detached-Eddy Simulation of Supersonic Separated Flows.-
Evaluation of Time Sample and Span Size Effects in DES of Nominally 2D
Airfoils beyond Stall.- Initial RANS and DDES of a Rudimentary Landing Gear.-
Detached Eddy Simulation of Turbulent Flow in a Highly Offset Intake
Diffuser.- DES for UCAV Weapon Bay Flow.- Control of the Unsteady Flow Inside
the SOFIA Telescope Cavity by Means of a Porous Fence.- Zonal-Detached Eddy
Simulation of a Civil Aircraft Engine Jet Configuration.- Assessment of DES
on the Flow after a Snow-Flake Orifice.- Detached-Eddy Simulations Applied to
Unsteady Crosswind Aerodynamics of Ground Vehicles.- Destabilizing Free Shear
Layers in X-LES Using a Stochastic Subgrid-Scale Model.- Prediction of
Transonic Buffet around a Wing with Flap.- Non-DES Type Hybrid RANS-LES
Modelling Approaches.- RANS/LES Simulation of a Separated Flow in a 3D Curved
Duct.- A New Partially Integrated Transport Modelling (PITM) Method for
Continuous Hybrid Non-zonal RANS/LES Simulations.- A Hybrid RANSLES Model
Based on Temporal Filtering.- Scale-Adaptive Simulation with Artificial
Forcing.- RDDES for Strong Shock-Wave/Boundary Layer Interaction.- Hybrid
RANS/LES of Plane Impinging Jets with k-? Based Models.- LES Modelling
Approaches.- Large Eddy Simulations: Wall Functions with Forcing Given
byBackscatter from a Scale-Similarity Model.- LES of the Non-isothermal Flow
in Rotating Cavity.- Comparison of Different Modelling Approaches.-
Turbulence Modelling for Supersonic Separated Flows.- Evaluation of Hybrid
RANS-LES Models in Ventilated Enclosures.- Experimental and Numerical
Investigation of Transonic Bump Flow.- Comparison of Hybrid RANS-LES
Calculations within the Framework of Compressible and Incompressible
Unstructured Solvers.- EU Projects in relation to hybrid RANS-LES
Approaches.- Description of Test Section and Measurement in a Nozzle for
Shock Upstream Mach Number M=1.45.- UFAST Project Unsteady Effects in Shock
Wave Induced Separation.- From FLOMANIA via DESider to ATAAC.- Short
Communications.- Scrutinizing a Seamless Hybrid LES/RANS Approach for
Turbomachinery Applications.- Turbulent Flow Modeling via Galerkin Method and
Finite Time Thermodynamics.