Midlatitude Stratosphere-Troposphere Exchange as diagnosed by MLS O3 and MOPITT CO assimilated fields.
N. Semane, M. Claeyman, A. Peuch, J. Warner, P. Ricaud, JP Cammas, A. Piacentini, B. Josse, D. Cariolle, S. Massart, H. Bencherif.
Athmospheric Chemestry and Physics, vol 10, pp. 2175-2194, 2010.
Seismic wave modeling for seismic imaging.
J. Virieux, S. Operto, H. Ben Hadj Ali, R. Brossier, V. Etienne, F. Sourbier, L. Giraud, and A. Haidar.
The Leading Edge, vol 25, number 8, pp. 538-544, 2009.
Adaptive version of Simpler GMRES.
P. Jiranek and M. Rozloznik
Numerical Algorithms, 53-1, pp. 93-112, 2009.
Computing the conditioning of the components of a linear least squares solution.
M. Baboulin, J. Dongarra, S. Gratton, and J. Langou
Numerical Linear Algebra with Applications, 16(7):517-533, 2009.
The FETI family of domain decomposition methods for inequality-constrained quadratic programming: Application to contact problems with conforming and nonconforming interfaces.
P. Avery and C. Farhat.
Computer Methods in Applied Mechanics and Engineering, 198(21-26):1673-1683, 2009.
Parallel tools for solving incremental dense least squares problems: application to space geodesy. M. Baboulin, L. Giraud, S. Gratton, and J. Langou
Journal of Algorithms and Computational Technology, 3(1):117-133, 2009.
Using dual techniques to derive componentwise and mixed condition numbers for a linear functional of a linear least squares solution. M. Baboulin and S. Gratton
BIT, 49(1):3-19, 2009.
Numerical study on incomplete orthogonal factorization preconditioners. Z.-Z. Bai, I. S. Duff, and J.-F. Yin.
J. Computational and Applied Mathematics, 226:22-41, 2009.
The design and use of a sparse direct solver for skew symmetric matrices. I. S. Duff
J. Computational and Applied Mathematics, 226:50-54, 2009.
Parallel algebraic hybrid solvers for large 3D convection-diffusion problems. L. Giraud and A. Haidar
Numerical Algorithms, 51(2):151-177, 2009.
An observation-space formulation of variational assimilation using a restricted preconditioned conjugate gradient algorithm. S. Gratton and J. Tshimanga
Quarterly Journal of the Royal Meteorological Society, 135(643):1573-1585, 2009
GNSS networks in algebraic graph theory. A. Lannes and S. Gratton
Journal of Global Positioning Systems, 8(1):1-23, 2009.
QR implementation of GNSS centralized approaches. A. Lannes and S. Gratton
Journal of Global Positioning Systems,7(2):133-147, 2009
Acoustically nonreflecting and reflecting boundary conditions for vorticity injection in compressible solvers. N. Guezennec et T. Poinsot
AIAA J. 47, 1709-1722, 2009.
Development and assessment of a coupled strategy for conjugate heat transfer with large eddy simulation: Application to a cooled turbine blade. F. Duchaine, A. Corpron, L. Pons, V. Moureau, F. Nicoud, and T. Poinsot
International Journal of Heat and Fluid Flow. 30:1129–1141, 2009.
DNS and modeling of the turbulent boundary layer over an evaporating liquid film G. Desoutter, C. Habchi, B. Cuenot et T. Poinsot
Int. J. Heat Mass Transfer. 2009, 52, 6028-6041
High performance parallel computing of flows in complex geometries - part 1: methods N. Gourdain, L. Gicquel, M. Montagnac, M. Garcia, G. Staffelbach, O. Vermorel, J-F. Boussuge and T. Poinsot,
Computational Science Disc. 2 015003 (28pp)
High performance parallel computing of flows in complex geometries - part 2: applications N. Gourdain, L. Gicquel, G. Staffelbach, O. Vermorel, F. Duchaine, J-F. Boussuge and T. Poinsot,
Computational Science Disc. 2 015004 (28pp)
High-Resolution Global and Basin-Scale Ocean Analyses and Forecasts H.E. Hurlburt, G.B. Brassington, Y. Drillet, M. Kamachi, M. Benkiran, R. Bourdallé-Badie, E.P. Chassignet, G.A. Jacobs, O. Le Galloudec, J.-M. Lellouche, E.J. Metzger, P.R. Oke, T.F. Pugh, A. Schiller, O.M. Smedstad, B. Tranchant, H. Tsujino, N. Usui, and A.J. Wallcraft
Oceanography, Vol 22, No 3, Sept 2009.
Validation and Intercomparison Studies Within GODAE F. Hernandez, L. Bertino, G. Brassington, E. Chassignet, J. Cummings, F. Davidson, M. Drévillon, G. Garric, M. Kamachi, J.-M. Lellouche, R. Mahdon, M.J. Martin, A. Ratsimandresy, and C. Regnier
Oceanography, Vol 22, No 3, Sept 2009.
2-D reconstruction of past sea level (1950-2003) using tide gauges records and spatial patterns from a general ocean circulation model W. Llovel, A. Cazenave, P. Rogel, A. Lombard and M. Bergé Nguyen
Climate of the Past, Vol 5, No 2, pp 217-227.
Addressing model uncertainty in seasonal and annual dynamical ensemble forecasts F. J. Doblas-Reyes, A. Weisheimer, M. Déqué, N. Keenlyside, M. McVean, J. Murphy, P. Rogel, D.Smith, T. N. Palmer
Q. J. Roy. Meteor. Soc., Vol 135, Issue 643, pp 1538-1559, 2009.
Parameterization of plume chemistry into large-scale atmospheric models: Application to aircraft NOx emissions D. Cariolle, D. Caro, R. Paoli, D. A. Hauglustaine, B. Cuenot, A. Cozic, R. Paugam
Journal of Geophysical Research, 114, D19302.
Large Eddy Simulation of spark ignition in a turbulent methane jet. G. Lacaze, E. Richardsons and T. Poinsot.
Combustion and Flame 156, 6, 1993-2009.
Large Eddy Simulation of Laser ignition and compressible reacting flow in a rocket-like configuration. G. Lacaze, B. Cuenot, T. Poinsot and M. Oschwald.
Combustion and Flame 156, 6, 1166-1180.
Evaluation of numerical strategies for two-phase reacting flows. J.M. Senoner, M. Sanjosé, T. Lederlin, F. Jaegle, E. Riber, B. Cuenot, L. Gicquel, H. Pitsch et T. Poinsot.
Compte Rendus de Mécanique, 337, 6-7, 458-468, 2009.
Large-Eddy Simulation of transcritical flows. T. Schmitt, L. Selle, B. Cuenot and T. Poinsot.
Compte Rendus de Mécanique, 337, 6-7, 528-538, 2009.
Comparison of numerical methods and combustion models for LES of a ramjet configuration. A. Roux, S. Reichtadt, N. Bertier, L. Gicquel, F. Vuillot et T. Poinsot.
Compte Rendus de Mécanique, 337, 6-7, 352-361, 2009.
Numerical and analytical investigation of the indirect noise in a nozzle. M. Leyko, F. Nicoud, S. Moreau et T. Poinsot.
Compte Rendus de Mécanique, 337, 6-7, 415-425, 2009.
Effect of multiperforated plates on the acoustic modes in combustors. E. Gullaud, S. Mendez, C. Sensiau, F. Nicoud et T. Poinsot.
Compte Rendus de Mécanique, 337, 6-7, 406-414, 2009.
Conjugate Heat transfer with Large Eddy Simulation application to gas turbine components. F. Duchaine, S. Mendez, F. Nicoud, A. Corpron, V. Moureau and T. Poinsot.
Compte Rendus de Mécanique, 337, 6-7, 550-561, 2009.
Chemical kinetics modelisation and LES combustion model effects on a perfectly premixed burner. G. Albouze, T. Poinsot and L. Y. M. Gicquel.
Compte Rendus de Mécanique, 337, 6-7, 318-328, 2009.
CERFACS award in INCITE program (Department of Energy) renewed.
8 million CPU hours have been awarded to CERFACS in 2010 to continue studying combustion in gas turbines using Large Eddy Simulation (LES). CERFACS is one of the only non american groups working in INCITE and this award confirms the unique place of CERFACS tools for reacting flows.
About INCITE: The Innovative and Novel Computational Impact on Theory and Experiment (INCITE) program promotes cutting-edge research that can only be conducted with state-of-the-art supercomputers. The Leadership Computing Facilities (LCFs) at Argonne and Oak Ridge national laboratories, supported by the U.S. Department of Energy Office of Science, operate the program. The LCFs award sizeable allocations (typically tens of millions of processor hours per project) on powerful supercomputers to researchers from academia,government, and industry addressing grand challenges in science and engineering such as developing new energy solutions and gaining a better understanding of climate change resulting from energy use.
CERFACS LES of combustion first in Combustion and Flame Top 10 citations.
The combustion paper by Selle, Lartigue, Poinsot, Koch, Schildmacher, Krebs, Prade, Kaufmann and Veynante on LES of gas turbine chambers ("Compressible large eddy simulation of turbulent combustion in complex geometry on unstructured meshes") is the most cited Combustion and Flame papers over the last five years. Comb. Flame is the first journal in the field of energy with an Impact factor larger than two. This work was a collaborative study between IMF Toulouse, Institute of Thermal Turbomachinery, University of Karlsruhe, Siemens PG and Laboratoire EM2C, Ecole Centrale de Paris. Another CERFACS LES paper ("Studies of mean and unsteady flow in a swirled combustor using experiments, acoustic analysis, and large eddy simulations") was ranked first since 2008 and is still number 8. This confirms the impact of recent CERFACS work on this field.
On November 9th, the INRIA Chairman, Michel COSNARD, and the CERFACS Director, Jean-Claude ANDRE, signed a convention creating a joint laboratory between the two establishments. This laboratory, whose Director is Jean ROMAN and whose Scientific Advisor is Iain DUFF, is located in Bordeaux and Toulouse. In its present first phase it will address the development of new algorithmic methods for massive parallelism and hybrid architectures.
International workshop on "multiphisics and unsteady flows for aircraft" at CERFACS in september 2010
CERFACS, jointly with ONERA, AIRBUS, SAFRAN, ERCOFTAC and the European Commission will organize the first MUSAF meeting (Multiphysics and Unsteady Simulations for Aeronautical Flows) at CERFACS in Toulouse (France), on September 27 - 29, 2010.
The conference will focus on coupled problems around aircraft (aerodynamics, aeroacoustics, fluid structure) but also within engines (noise, combustion, instabilities, coupling between compressor, chamber and turbine) and on the use of High Performance Computing (HPC) to address these issues. By bringing together the communities working on the different elements of aircraft and engine designs, the most important issues in the flield of HPC in these fields will be adressed.
The MUSAF programme will be available at the end of October 2009 on the wen site :
In order to increase its hosting capacity for an additional one hundred persons, CERFACS has just launched an extension program. A second building will be erected close to the actual one, and connected via a number of meting rooms and an 80-seat conference room. The architect was chosen on Septembre 30, 2009. The building phase will indeed start at the very beginning of 2010, and should be finished before the end of the year. The actual building will then be slightly improved and remodelled.
CERFACS has just installed during summer 2009 a new high-performance computing resource from IBM. Consisting of 656 Intel Nehalem cores on 82 nodes this new server has a peak performance of 7 Tflop/s. Its QDR (Quadruple Data Rate) Infinband network and its GPFS (Global Parallel FileSystem) data infrastructure will insure a good scalability of parallel applications.
The researchers will use this new computational resource to run Navier-Stokes type simulations (elsA, climate, ...) with increased resolutions in time and space, combined with more realistic physical models.
CERFACS sponsors "The last messengers of the sea-ice
"Derniers messagers des glaces" ("The last messengers of the sea-ice") is an initiative of the social center "La Pepinière" located in Pau. Eight teenagers (the messengers) have built from scratch a project related to climate change. Their goal is to understand the physical mechanisms leading to global warming and to touch its signature in order to report about its rapidity and importance at the timescale of a generation. Accompanied by Christophe Cassou, CNRS scientist at Cerfacs, they leave Pau on July 9, 2009, heading to Spitzberg. On board on the Albarquel, their main objectives are to touch the drifting sea-ice, to compare old pictures of glaciers to their present-day extensions and to perform a series of oceanographical and meteorological measurements etc. You can follow their adventure on the their blog/website (http://derniersmessagersdesglaces.jimdo.com/).
Gabriel Staffelbach awarded the second place "BULL Joseph Fourier" prize 2009.
This prize is given to G. Staffelbach (CERFACS - CFD team) for his work on massively parallel simulations with the AVBP code, for applications to combustion within gas turbines and engines to produce combustors which are more reliable and use less fuel, as required by environmental protection and diminishing energy ressources. He is awarded a total of 500,000 hours of computing time.
A scientific paper on algorithmics among the most frequently downloaded.
The Society for Industrial and Applied Mathematics (SIAM) has implemented a new feature that provides a list of the SIAM journal articles that are most often downloaded. We are pleased to congratulate Pavel Jiranek, postdoctoral fellow in the Parallel Algorithms team: his joint paper with Miroslav Rozloznik and Martin Gutknecht "How to Make Simpler GMRES and GCR More Stable " (SIMAX, vol. 30-4, pp 1483-1499, 2008) was the fifth most downloaded article from the "SIAM Journal Matrix Analysis and its Applications" (SIMAX) in January 2009. SIMAX is one of the premier journals in the field of numerical linear algebra.
Scientific awards
Anthony Roux has received the PhD prize of Institut National Polytechnique de Toulouse for his work on Large Eddy Simulation of ramjet flows. This work was supported by DGA (Délégation générale pour l'armement) and performed in collaboration with ONERA. A. Roux is now a post doctoral student at Center for Turbulence Research at Stanford, collaborating with CERFACS and SAFRAN.
Mélodie Mouffe has been awarded the Léopold Escande Prize of Institut National Polytechnique of Toulouse. Her PhD thesis on "Multilevel optimization in infinity norm and associated stopping criteria" has been jointly supervised by Serge Gratton and Philippe Toint in the framework of a cotutelle between Institut National Polytechnique of Toulouse and FUNDP University of Namur (Belgium). http://www.cerfacs.fr/algor/reports/Dissertations/TH_PA_09_49.pdf
Martin Fuchs (postdoctoral fellow in the "Parallel Algorithms" Team) has been awarded the silver IJAR Young Researcher Award during the last conference ISIPTA'09 (http://www.sipta.org/isipta09/). This award granted by the International Journal of Approximate Reasoning (IJAR) honours outstanding young researchers in imprecise probabilities.
Sophie Valcke, research engineer in the Climate Modelling and Global Change team, has been awarded, with 8 other engineers and researcher from Environment Canada, the 2009 Geoff Howell distinction for innovation from the Meteorological Service of Canada. This distinction rewards the innovating scientific and technical work performed to assemble and validate an operational ocean-atmosphere coupled sytem modelling the Gulf of Saint Lawrence using the OASIS coupler developed at CERFACS.
Benedetta Franzelli, an Italian PhD student hired at CERFACS (CFD team) under the ECCOMET European project (Marie Curie: www.cerfacs.fr/eccomet) has been awarded the Amelia Earhart fellowship. The Zonta International Amelia Earhart Fellowships were established in 1938 in honor of Amelia Earhart, famed pilot and Zonta club member. The Amelia Earhart Fellowships are awarded annually to women pursuing a Ph.D./doctoral degree in aerospace-related sciences and aerospace-related engineering. The Fellowship of US$10,000 may be used at any university or college offering accredited post-graduate courses and degrees.
