LEGI (Grenoble)

Guillaume Balarac ( webpage) is the principal investigator of this project. The objective of his research activities is to develop LES approach for complex flows. He has already worked on all the technical parts of this project. Each work has led to international publications. Indeed, he has already worked on the analysis [Balarac et al., 2007a] and control [Balarac et al., 2007b] of the mixing process in turbulent coaxial jets. The anomalous behavior of the scalar spectrum has been recovered in his study. He has also worked on the molecular Schmidt number influence on the SGS modeling of a passive scalar [Brun et al., 2008]. Moreover, he has already collaborated with G.-H. Cottet on particle methods [Cottet et al., 2009]. Finally, he has already used the optimal estimator theory to improve the SGS models for reacting flows [Balarac et al., 2008a and b]. This experience will be valuable in the coordination of research activities about the modeling and simulation of passive scalar.

Antoine Vollant

Jean-Baptiste Lagaert ( webpage)

Christophe Corre ( webpage)

Patrick Bégou ( webpage)

Christophe Brun ( webpage) has a strong background in high performance computing of turbulent flows in engineering sciences. He has worked for more then ten years on developing new SGS models for turbulent flows and applying them in wall bounded flows and free shear flows such as channel flows, jets and wakes. He has worked in the framework of both of incompressible and compressible flow in the limit of non-hypersonic turbulence. He recently moved to LEGI Grenoble to work on atmospheric boundary layers in alpine regions and is bringing in this field all his engineering knowledge of turbulent boundary layer flows and LES numerical techniques.

LJK (Grenoble)

Georges-Henri Cottet ( webpage) is a specialist of numerical analysis. His work deals more specifically with the design, analysis and application of particle methods for flow problems. He has co-authored a book [Cottet and Koumoutsakos, 2000], which has become a reference in the domain of particle methods for incompressible flows. His most recent work in this area concerns the application of particle methods for active flow control and the design of multi-scale particle methods for compressible and incompressible flows. He has coordinated an ANR project 2007-2009 on mutpiphysics and multiscale modeling that has been very fruitful (see http: ljk/ In the present project, he will work on the development and implementation of particle algorithms coupled with spectral and finite-volume methods and LES models for the transport of scalar.

Christophe Picard got his PhD in 2007 in Houston, Tx, USA under the supervision of M. Garbey. The subject of his PhD was on a new framework for a posteriori error estimator. He also worked on different algorithms for parallel simulation and distributed computing. He is the author of 1 journal paper and several conferences proceedings. C. Picard worked on several parallel simulation frameworks ranging from Chimera grids approach for complex geometries to finite differences methods with moving objects. He also worked on coupling of code in a distributed framework in the context of solution verification. In this project, his focus will be on the computational load balancing between the solvers based on the ratio of the computational cost of the different codes. Moreover, thanks to his experience in developing parallel algorithm, he will contribute to the load balancing of the interpolations loop within the ppm library to make full use of the CPU/GPU computing resources.

LASMEA (Aubière)

Antoine Moreau was the first author to propose to use the optimal estimator theory to measure models performance in the context of LES [Moreau et al., 2006]. He has applied advanced numerical techniques to various domains of physics, obtaining results in the domain of molecular clusters using genetic algorithms for instance [Periquet et al., 2000]. He has used neural networks as optimal estimators in LES. He is currently working in the field of nanophotonics, trying to mix physical and numerical (optimization) approaches of nanoscale structures [Moreau et al., 2007].

LASEF (Lisboa)

Carlos da Silva will work on the development of SGS models based on transport equations. He analyzed in detail the interactions between large and small scales motions in the physical space [da Silva and Métais, 2002], and worked on the development of LES models based on the transported SGS kinetic energy and SGS scalar variance [da Silva and Pereira, 2007; da Silva et al., 2008]. Recently he has studied the physics [da Silva and Pereira, 2008] and LES modelling near T/NT interfaces [da Silva, 2009].

CEA (Grenoble)

The last partner of this consortium will be the CEA team developing TRIO_U ( webpage) managed by Frédéric Ducros. TRIO_U is a project of development and operating of a Computational Fluid Dynamics (CFD) code. It is developed in the Modeling and Software Development Group of the Nuclear Energy Division of CEA. The qualities of the TRIO_U code are based on a multidisciplinary research team in physical modeling, numerical analysis and computer science. The physical models developed, the numerical methods used and the massive parallelism of the TRIO_U code allow to simulate various problems, going from local simulations of two-phase flows to simulations of turbulent flows on industrial facilities such as portions of nuclear reactors.