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Info

List of EUROMECH Colloquia in 2009

• YEARS:
• 2012
• 2011
• 2010
• 2009
• 2008
• 2007
• 2006
• 2005
• 2004
• 2003
• 2002
• 2001
• 2000
• 1999

• [497] Recent Developments and New Directions in Thin-Film Flow

  Date:	6 July 2009 - 10 July 2009
  Location:	Edinburgh, UK
  Contact:	Chairperson: Prof. Stephen K. Wilson Department of Mathematics University of Strathclyde, Livingstone Tower 26 Richmond Street Glasgow, G1 1XH, UK Ph: +44 141 548 3820 Fax: +44 141 548 3345 E-Mail: s.k.wilson@strath.ac.uk Co-Chairperson: Professor G. M. Homsy Department of Mechanical Engineering University of California, Santa Barbara USA Dr. Brian R. Duffy, Department of Mathematics, University of Strathclyde, UK EUROMECH contact person: Prof. I.D. Abrahams website

• [503] Nonlinear Normal Modes, Dimension Reduction and Localization in Vibrating Systems

  Date:	27 September 2009 - 2 October 2009
  Location:	Frascati (Rome), Italy
  Contact:	Chairperson: Prof. Giuseppe Rega Dipartimento di Ingegneria Strutturale e Geotecnica Universita' di Roma La Sapienza Via A. Gramsci 53 00197 Roma, Italy Ph: +39-06-49919195 Fax: +39-06-49919192 or +39-06-3221449 e-mail: Giuseppe.Rega@uniroma1.it Co-chairperson: Prof. Alexander Vakakis Division of Mechanics National Technical University of Athens P.O. Box 64042, GR-157 10 Zografos Athens, Greece EUROMECH Contact Person: Prof. Michel Raous Website
  Information:	The Colloquium aims at presenting the latest developments in the areas of Nonlinear Normal Modes, Dimension Reduction and Localization, and their applications in vibrating systems. Nonlinear Normal Modes (NNMs) is a classical topic which is presently given a more modern interpretation mostly as regards their formulation for continuous or discontinuous systems, strongly nonlinear regimes, and discretized structures, as well as their use in various applications. They are also of major interest in the framework of Dimension Reduction of dynamical systems, an area where various methods are being formulated and compared with each other, along with the reduced order models – developed for different purposes/systems – based on just nonlinear (vs linear) normal modes or proper orthogonal modes or multi-modes ensuing from nonlinear finite element analyses. In turn, Localization is one major topic (to be possibly addressed via NNMs) in wave propagation and targeted energy transfer. In this context, there is special interest towards analyzing possible occurrence in mechanics of such dynamic phenomena as the discrete breathers highlighted in applied mathematics and physics, where they are paradigmatic solutions in periodic lattices. Cross-fertilization among such companion areas could allow to exploit results useful to describe analogous phenomena likely to occur in engineered materials and devices, with nontrivial effects in terms of efficient/robust energy focusing/transfer, and material/system design.

• [504] Large Eddy Simulation for Aerodynamics and Aeroacoustics

  Date:	23 March 2009 - 25 March 2009
  Location:	Technische Universität München, Germany
  Contact:	Chairperson: Prof. Dr.-Ing. Michael Manhart Fachgebiet Hydromechanik Arcisstraße 21 80333 München, Germany Ph: +49 (0) 89 289 22583 Fax: +49 (0) 89 289 28332 e-mail: m.manhart@bv.tum.de Co-chairperson: Prof. Christophe Brun Université Joseph Fourier Laboratoire des Ecoulements Geophysiques et industriels BP 53 38041 Grenoble CEDEX 9 France Ph: +33 (0)4 76 82 5045 Fax : +33 (0)4 76 82 7022 e-mail :christophe.brun@hmg.inpg.fr EUROMECH Contact person: Prof. Wolfgang Schroeder Website
  Information:	Within the proposed Euromech colloquium “Large Eddy Simulation for Aerodynamics and Aeroacoustics“, novel methods for Large Eddy Simulation (LES) of complex flows and Computational Aero-acoustics (CAA) shall be considered and discussed. As noise prediction by CAA mainly depends on the quality of the simulation of the turbulent flow field, both approaches will be considered as a common topic. Hybrid approaches based on flow field predictions by incompressible solvers will also be a topic. The aim of the colloquium is to assess and improve the state of the art approaches for prediction and analysis of complex turbulent flow fields with special emphasis on prediction and analysis of aerodynamic noise. It therefore establishes a link between classical Fluid Dynamics and Acoustics. The use of LES for the analysis of turbulent flow fields has become one of the major trends during the past years, since there is a massive requirement of the industry for accurate three-dimensional and time resolved flow predictions, not only for noise predicitons. However, the prediction of high Reynolds number flows with complex geometry or physics is difficult due to massive computational requirements that often exceed the capacities of the available hard-ware. A number of strategies have been exploited to overcome these bottlenecks, high-order adaptive schemes, implicit sub grid scale modeling, wall models, coupling of LES with Reynolds averaged models (RANS). The impact of these strategies on quality of the solutions and efficiency of the solvers has to exploited for a broad range of flows. Special emphasis will be set on the prediction of internal and external Aerodynamic effects including aero-acoustic noise. The main classes of problems considered here are wall bounded and free shear flows ranging from channel, duct and pipe flow with distortion over wakes behind bluff bodies to jets and mixing layers.

• [506] CPNLS-09 Solitons in their roaring forties : coherence and persistence in nonlinear waves

  Date:	6 January 2009 - 10 January 2009
  Location:	Observatory of Nice, France
  Contact:	Chairperson: Prof. Jean Guy Caputo, Laboratoire de Mathematiques, INSA de Rouen, BP 8, 76131 Mont-Saint-Aignan cedex, France phone: +33 2 35 52 83 44 fax: + 33 2 35 52 83 32 email: caputo@insa-rouen.fr Co-Chairperson: Prof. Mads Peter Soerensen Technical University of Denmark, Lyngby

• [507] Immersed boundary methods: current status and future research directions, co-sponsored by ERCOFTAC

  Date:	15 June 2009 - 17 June 2009
  Location:	Amsterdam, The Netherlands
  Contact:	Chairperson: Dr. M. Pourquie Laboratory for Aero- and Hydrodynamics Dept. of Mechanical Engineering Mekelweg 2 2628 CD Delft, Netherlands phone: +31-15-2782997 fax: +31-15-2782947 email: m.j.b.m.pourquie@tudelft.nl Co-Chairperson: Prof. S. Turek Universitaet Dortmund Fachbereich Mathematik, Lehrstuhl LSIII Vogelpothsweg 87 44227 Dortmund Germany Website
  Information:	Over the last years, so-called immersed boundary methods have become increasingly popular in computational fluid dynamics. In these methods, the boundaries of obstacles in a fluid are represented on a non-conforming grid, for instance curved obstacles are represented on a Cartesian grid. The reasons for the popularity of these methods are ease of programming and cost-effectiveness. These issues are of primary importance for applications which involve costly simulations, such as LES and DNS. Moreover, these methods retain much of their elegance if additional physics complicates matter, for instance if there are moving boundaries, as in biological flows, or when many particles are added.

• [508] Wind turbine wakes

  Date:	20 October 2009 - 22 October 2009
  Location:	Universidad Politécnica de Madrid, Spain
  Contact:	Chairperson: Prof. Antonio Crespo Departamento de Ingenieria Energetica y Fluidomecanica E.T.S.I. Industriale Universidad Politecnica de Madrid Jose Gutierrez Abascal, 228006 Madrid, Spain Phone: +34 91 336 3152 Fax: +34 91 336 3006 E-mail: crespo@etsii.upm.es Co-Chairperson: Prof. Gunner Chr. Larsen Wind Energy Department Risø National Laboratory for Sustainable Energy Technical University of Denmark P.O. 49 DK-4000 Roskilde, Denmark Phone: +45 4677 5056 Fax: +45 4677 5083 E-mail: gunner.larsen@risoe.dk Website
  Information:	Wind turbine wakes are an interesting topic of study, because the momentum deficit and the increased level of turbulence created by turbines in a wind farm may cause a reduction in power output and an increase in unsteady and fatigue loads on downstream located machines. Besides, a good knowledge of the aerodynamics in the near wake is essential to understand the physics of power extraction by wind turbines. The topics to be addressed will include: Numerical models of wind turbine wakes - single wakes as well as multiple wakes in wind farms. Turbulence closure models. Actuator disk and actuator line models. Experimental work, based on both wind tunnel experiments and full scale field experiments. Flow visualization. Tip vortex properties. Characteristics of the added turbulence created in the wake. Influence of atmospheric stability. Influence of topography. Wake meandering. Fatigue and loads. Offshore wind farms. Strategies for control based on wind turbine wakes.

• [509] Vehicle aerodynamics

  Date:	24 March 2009 - 26 March 2009
  Location:	TU Berlin, Germany
  Contact:	Chairperson: Dr. Martin Schober MLN/TSSA Bombardier Transportation Am Rathenaupark 16761 Hennigsdorf, Germany phone: +49 3302 89 3405 fax: +49 3302 89 3669 email: Martin.Schober@de.transport.bombardier.com Co-Chairpersons: Prof. Lennart Löfdahl Chalmers University, Sweden Dr. Christian Navid Nayeri TU Berlin, Germany
  Information:	With the increasing service speed of modern high-speed railway traffic, aerodynamic aspects are gaining importance. The aerodynamic research topics comprise both pure performance improvements, such as the continuous lowering of aerodynamic drag for energy efficiency, as well as safety relevant topics, such as cross-wind stability. The latter topic was most recently brought to attention when a swiss narrow-gauge train overturned during the severe storm Kyrill in january 2007. The shape of the train head usually has largest influence on cross wind stability. Slipstream effects of passing trains cause aerodynamic loads on objects and passengers waiting at platforms. The strength of the slipstream is determined by both the boundary layer development along the length of the train and the wake developing behind the tail of the train. Since high-speed trains can be considered to be as smooth as technically possible, attention is drawn to the wake region. The wake of the train again is also one important factor for the total drag of a train. Due to the fact that trains are bidirectional, optimisation of the leading car of a train with respect to drag and cross wind performance while simultaneously minimising the wake of the train for drag and slipstream performance is a great challenge. Modern optimisation tools are used to aid this multi-parameter multi-constraint design optimisation in conjunction with both CFD and wind tunnel investigations. Since many of the aerodynamic effects in the railway sector are of similar importance to road vehicles, the aim of the colloquium is to bridge the application of shape optimisation principles between rail- and road vehicles.

• [510] Mechanics of generalized continua: a hundred years after the Cosserats

  Date:	13 May 2009 - 16 May 2009
  Location:	UPMC, Paris, France
  Contact:	Chairperson: Prof . Gérard A. Maugin  Institut Jean Le Rond d’Alembert Université Pierre et Marie Curie Case 162, Tour 55, 4 Place Jussieu 75252 Paris Cedex 05 France phone:+33.1.44.27.53.12 fax:+33.1.44.27.52.59 email:gam@ccr.jussieu.fr Co-Chairpersons: Prof. A.V. Metrikine Delft University of Technology, Delft, The Netherlands Fax: +31.15.2785767, e-mail: A.Metrikine@tudelft.nl Professor V.I. Erofeyev Mechanical Engineering Institute RAS Nizhny-Novgorod, Russia, Fax. +7.831.4320576, e-mail : Erf04@sinn.ru Website

• [512] Small scale turbulence and related gradient statistics

  Date:	26 October 2009 - 29 October 2009
  Location:	Accademia delle Scienze, Turin, Italy
  Contact:	Chairperson: Prof. Daniela Tordella Politecnico di Torino Dipartimento di Ingegneria Aeronautica e Spaziale Corso Duca degli Abruzzi 24, 10129 Torino I Phone: +39 011 564 6812 Fax: +39 011 564 6899 Email: daniela.tordella@polito.it Co-Chairperson: Prof. K.R.Sreenivasan The Abdus Salam International Centre for Theoretical Physics Strada Costiera 11 34014 Trieste, Italy Email: krs@ictp.it Website
  Information:	Turbulent flows are known to contain a wide range of scales, each range being characterized by its own physics. For instance, the energy dissipation takes place at small-scales. Yet, the process is linked to the large scales of the system. One central problem of turbulence is to compute the large scale phenomena by modeling or parameterizing the small scales; this is the goal of sub-grid scale (SGS) models. Another example deals with modeling micromixing (relevant to chemical industry and combustion), in which small scales are the important feature. Laboratory and numerical results are continuously being generated on the small-scale features of turbulence dynamics. One fundamental question is: are the small scales universal? If so, under which conditions? If not, when? In particular, what is their connection to the large scale motion? The basis for the near-universal behavior of small scales is provided by Kolmogorov’s theory (1941 and 1962). The gaps in this theory are becoming increasingly certain. The objective of the Colloquium is to establish a possible consensus on new ideas, post- Kolmogorov, dealing with the non-universality of small scale dynamics. A manifestation of the non-universal behavior of small-scales is closely related to small-scale anisotropy. This feature can be recast and presumably explained in different ways. For example, 1. Local structure of turbulence from a kinematic point of view. It is interesting to detect the role of local velocity gradients, under the effect of strain and rotation. Particular attention must be paid to the dissipation rate of the scalar variance, as well as to its local anisotropic behavior. 2. Statistical approach, when the small scales are explicitly linked to the turbulence forcing. 3. Role played by coherent structures. 4. Effects of rotation, stratification and such other body forces.