Direct and Large Eddy Simulation XII

Direct and Large Eddy Simulation XII

This book gathers the proceedings of the 12th instalment in the bi-annual Workshop series on Direct and Large Eddy Simulation (DLES), which began in 1994 and focuses on modern techniques used to simulate turbulent flows based on the partial ...

Author: Manuel García-Villalba

Publisher: Springer Nature

ISBN: 9783030428228

Category: Technology & Engineering

Page: 508

View: 316

This book gathers the proceedings of the 12th instalment in the bi-annual Workshop series on Direct and Large Eddy Simulation (DLES), which began in 1994 and focuses on modern techniques used to simulate turbulent flows based on the partial or full resolution of the instantaneous turbulent flow structure. With the rapidly expanding capacities of modern computers, this approach has attracted more and more interest over the years and will undoubtedly be further enhanced and applied in the future. Hybrid modelling techniques based on a combination of LES and RANS approaches also fall into this category and are covered as well. The goal of the Workshop was to share the state of the art in DNS, LES and related techniques for the computation and modelling of turbulent and transitional flows. The respective papers highlight the latest advances in the prediction, understanding and control of turbulent flows in academic and industrial applications.
Categories: Technology & Engineering

Direct and Large Eddy Simulation VI

Direct and Large Eddy Simulation VI

Proceedings of the Sixth International ERCOFTAC Workshop on Direct and Large-Eddy Simulation, held at the University of Poitiers, September 12-14, 2005 E. Lamballais, Rainer Friedrich, Bernard J. Geurts, Olivier Métais.

Author: E. Lamballais

Publisher: Springer Science & Business Media

ISBN: 9781402051524

Category: Technology & Engineering

Page: 780

View: 392

The sixth ERCOFTAC Workshop on ‘Direct and Large-Eddy Simulation’ (DLES-6) was held at the University of Poitiers from September 12-14, 2005. Following the tradition of previous workshops in the DLES-series, this edition has reflected the state-of-the-art of numerical simulation of transitional and turbulent flows and provided an active forum for discussion of recent developments in simulation techniques and understanding of flow physics.
Categories: Technology & Engineering

Direct and Large Eddy Simulation IV

Direct and Large Eddy Simulation IV

Phys. Fluids, 12:403–417, 2000. X. Ma, G.S. Karamanos, and G.E. Karniadakis. Dynamics and lowdimensionality of a turbulent near wake. J. Fluid Mech, 410:29–65, 2000. I. Mary and P. Sagaut. Large eddy simulation of flow over an airfoil.

Author: Bernard Geurts

Publisher: Springer Science & Business Media

ISBN: 9789401712637

Category: Technology & Engineering

Page: 530

View: 795

This volume contains the proceedings of the 2001 DLES4 workshop. It describes and discusses state-of-the-art modeling and simulation approaches for complex flows. Fundamental turbulence and modeling issues but also elements from modern numerical analysis are at the heart of this field of interest.
Categories: Technology & Engineering

Direct and Large Eddy Simulation V

Direct and Large Eddy Simulation V

Proceedings of the fifth international ERCOFTAC Workshop on direct and large-eddy simulation held at the Munich University of Technology, August 27–29, ... 12 1/20 T/12 0.4 - 3.0 with the distance between each of about 150 wall units.

Author: Rainer Friedrich

Publisher: Springer Science & Business Media

ISBN: 9781402023132

Category: Science

Page: 651

View: 570

The fifth ERCOFfAC workshop 'Direct and Large-Eddy Simulation-5' (DLES-5) was held at the Munich University of Technology, August 27-29, 2003. It is part of a series of workshops that originated at the University of Surrey in 1994 with the intention to provide a forum for presentation and dis cussion of recent developments in the field of direct and large-eddy simula tion. Over the years the DLES-series has grown into a major international venue focussed on all aspects of DNS and LES, but also on hybrid methods like RANSILES coupling and detached-eddy simulation designed to provide reliable answers to technical flow problems at reasonable computational cost. DLES-5 was attended by 111 delegates from 15 countries. Its three-day pro gramme covered ten invited lectures and 63 original contributions partially pre sented in parallel sessions. The workshop was financially supported by the fol lowing companies, institutions and organizations: ANSYS Germany GmbH, AUDI AG, BMW Group, ERCOFfAC, FORTVER (Bavarian Research Asso ciation on Combustion), JM BURGERS CENTRE for Fluid Dynamics. Their help is gratefully acknowledged. The present Proceedings contain the written versions of nine invited lectures and fifty-nine selected and reviewed contributions which are organized in four parts: 1 Issues in LES modelling and numerics 2 Laminar-turbulent transition 3 Turbulent flows involving complex physical phenomena 4 Turbulent flows in complex geometries and in technical applications.
Categories: Science

Large Eddy Simulation for Incompressible Flows

Large Eddy Simulation for Incompressible Flows

( Direct and Large Eddy Simulation III , Voke , Sandham and Kleiser eds . ) Kluwer , 225–236 250. Germano , M. ( 2001 ) : LES overview . ( DNS / LES Progress and Challenges , Liu , Sakell and Beutner eds . ) , Greyden Press , 1-12 251.

Author: P. Sagaut

Publisher: Springer Science & Business Media

ISBN: 3540263446

Category: Computers

Page: 556

View: 240

'Large Eddy Simulation for Incompressible Flows' presents a comprehensive account and a unified view of this young but very rich discipline. LES is the only efficient technique for approaching high Reynolds numbers when simulating industrial, natural or experimental configurations.
Categories: Computers

Direct and Large Eddy Simulation III

Direct and Large Eddy Simulation III

Professors M. Germano, A. Leonard, J. Jimenez, R. Kerr and S. Sarkar gave the invited lectures, text versions of which will be found in this volume.

Author: Peter R. Voke

Publisher: Springer Science & Business Media

ISBN: 9789401592857

Category: Science

Page: 440

View: 406

The practical importance of turbulence led the U.K. Royal Academy of Engineering to launch an Initiative on Turbulence, the most important outcome of which was the definition and agreement of the 1999 Newton Institute Research Programme on Turbulence. The main aim of the- month programme, held at the institute in Cambridge, was to bring together the mathematics and engineering communities involved in the turbulence area to address the many problems and to map out future strategy. As a part of the Research Programme, a Symposium on Direct and Large-Eddy Simulation was jointly organised with ERCOFfAC through their Large-Eddy Simulation Interest Group and took place in May 1999. Two previous ERCOFf AC Workshops had already taken place on these closely related varieties of turbulence simulation, at The University of Surrey in 1994 and at Universite Joseph Fourier, Grenoble in 1996. The Symposium at Cambridge was therefore the third in the ERCOFTAC series, enhanced by the presence of leading figures in the field from Europe and the USA who were resident at INI for that period of the Research Programme. Professors M. Germano, A. Leonard, J. Jimenez, R. Kerr and S. Sarkar gave the invited lectures, text versions of which will be found in this volume. As occurred at the previous two ERCOFT AC workshops, there were almost one hundred participants mostly from Europe but including some from Japan and the USA, including on this occasion resident scientists of the INI Research Programme.
Categories: Science

Direct and Large Eddy Simulation II

Direct and Large Eddy Simulation II

References [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] Germano,M., U.Piomelli, P.Moin and W.H.Cabot, A dynamic subgrid-scale eddy viscosity model, Phys. Fluids, A3, 1760 (1991). Lilly,D.K., A proposed modification of ...

Author: Jean-Pierre Chollet

Publisher: Springer Science & Business Media

ISBN: 9789401156240

Category: Science

Page: 426

View: 206

Progress in the numerical simulation of turbulence has been rapid in the 1990s. New techniques both for the numerical approximation of the Navier-Stokes equations and for the subgrid-scale models used in large-eddy simulation have emerged and are being widely applied for both fundamental and applied engineering studies, along with novel ideas for the performance and use of simulation for compressible, chemically reacting and transitional flows. This collection of papers from the second ERCOFTAC Workshop on Direct and Large-Eddy Simulation, held in Grenoble in September 1996, presents the key research being undertaken in Europe and Japan on these topics. Describing in detail the ambitious use of DNS for fundamental studies and of LES for complex flows of potential and actual engineering importance, this volume will be of interest to all researchers active in the area.
Categories: Science

Direct and Large Eddy Simulation VII

Direct and Large Eddy Simulation VII

Proceedings of the Seventh International ERCOFTAC Workshop on Direct and Large-Eddy Simulation, ... especially for very small time steps, due to the loss of time-consistency caused by the use of a nonindempotent filtering [12].

Author: Vincenzo Armenio

Publisher: Springer Science & Business Media

ISBN: 9789048136520

Category: Technology & Engineering

Page: 646

View: 986

After Surrey in 1994, Grenoble in 1996, Cambridge in 1999, Enschede in 2001, Munich in 2003 and Poiters in 2005, the 7th Workshop, DLES7, will be held in Trieste, again under the auspices of ERCOFTAC. Following the spirit of the series, the goal of this latest workshop is to establish a state-of-the-art of DNS and LES techniques for the computation and modeling of transitional/turbulent flows covering a broad scope of topics such as aerodynamics, acoustics, combustion, multiphase flows, environment, geophysics and bio-medical applications. This gathering of specialists in the field should once again be a unique opportunity for discussions about the more recent advances in the prediction, understanding and control of turbulent flows in academic or industrial situations.
Categories: Technology & Engineering

Direct and Large Eddy Simulation XI

Direct and Large Eddy Simulation XI

Differently from other approaches, we resolve the canopy directly introducing a set of rigid and solid filaments of finite cross-section which are placed perpendicularly to the horizontal wall. To impose the boundary conditions that ...

Author: Maria Vittoria Salvetti

Publisher: Springer

ISBN: 9783030049157

Category: Technology & Engineering

Page: 608

View: 530

This book gathers the proceedings of the 11th workshop on Direct and Large Eddy Simulation (DLES), which was held in Pisa, Italy in May 2017. The event focused on modern techniques for simulating turbulent flows based on the partial or full resolution of the instantaneous turbulent flow structures, as Direct Numerical Simulation (DNS), Large-Eddy Simulation (LES) or hybrid models based on a combination of LES and RANS approaches. In light of the growing capacities of modern computers, these approaches have been gaining more and more interest over the years and will undoubtedly be developed and applied further. The workshop offered a unique opportunity to establish a state-of-the-art of DNS, LES and related techniques for the computation and modeling of turbulent and transitional flows and to discuss about recent advances and applications. This volume contains most of the contributed papers, which were submitted and further reviewed for publication. They cover advances in computational techniques, SGS modeling, boundary conditions, post-processing and data analysis, and applications in several fields, namely multiphase and reactive flows, convection and heat transfer, compressible flows, aerodynamics of airfoils and wings, bluff-body and separated flows, internal flows and wall turbulence and other complex flows.
Categories: Technology & Engineering

Direct and Large Eddy Simulation I

Direct and Large Eddy Simulation I

Selected papers from the First ERCOFTAC Workshop on Direct and Large-Eddy Simulation Peter R. Voke, Leonhard Kleiser, Jean-Pierre Chollet ... 12. Krishnappan , B.G. and Lau , Y.L. , Turbulence modelling of floodplain flows . J. Hydr .

Author: Peter R. Voke

Publisher: Springer Science & Business Media

ISBN: 0792331060

Category: Technology & Engineering

Page: 434

View: 526

It is a truism that turbulence is an unsolved problem, whether in scientific, engin eering or geophysical terms. It is strange that this remains largely the case even though we now know how to solve directly, with the help of sufficiently large and powerful computers, accurate approximations to the equations that govern tur bulent flows. The problem lies not with our numerical approximations but with the size of the computational task and the complexity of the solutions we gen erate, which match the complexity of real turbulence precisely in so far as the computations mimic the real flows. The fact that we can now solve some turbu lence in this limited sense is nevertheless an enormous step towards the goal of full understanding. Direct and large-eddy simulations are these numerical solutions of turbulence. They reproduce with remarkable fidelity the statistical, structural and dynamical properties of physical turbulent and transitional flows, though since the simula tions are necessarily time-dependent and three-dimensional they demand the most advanced computer resources at our disposal. The numerical techniques vary from accurate spectral methods and high-order finite differences to simple finite-volume algorithms derived on the principle of embedding fundamental conservation prop erties in the numerical operations. Genuine direct simulations resolve all the fluid motions fully, and require the highest practical accuracy in their numerical and temporal discretisation. Such simulations have the virtue of great fidelity when carried out carefully, and repre sent a most powerful tool for investigating the processes of transition to turbulence.
Categories: Technology & Engineering