Cerfacs Enter the world of high performance ...

Second International Workshop on Combinatorial Scientific Computing (June 21th-23th, 2005)


Second International Workshop on Combinatorial Scientific Computing (CSC05)
June 21–23th, 2005 at CERFACS, Toulouse, France





The Second International Workshop on Combinatorial Scientific Computing (CSC05) will provide a forum for researchers interested in the interaction of combinatorial mathematics and algorithms with scientific computing to discuss current developments in research.

CSC05 follows the pioneering SIAM Workshop on Combinatorial Scientific Computing (CSC04) held at San Francisco in Feb 2004. The CSC04 Workshop, attended by close to a hundred participants, featured three plenary talks and 21 selected talks on the themes of sparse matrix computations, high-performance algorithms, combinatorial problems in optimization and automatic differentiation, mesh generation, computational biology, and combinatorial matrix theory. The CSC05 Workshop aims to bring together researchers interested in these themes as well as other aspects of combinatorial mathematics and algorithms in scientific computing, broadly interpreted. Researchers in emerging application areas as well as theoretical areas that intersect with combinatorial scientific computing, e.g., information science, networks, bioinformatics, and combinatorial optimization, are invited to participate.

Students are very much encouraged to participate. Low registration fees (that include the lunches and the coffee breaks) are offered and a limited number of grants to support their local accomodation are also available.


CSC05 : Program


Invited Speakers
Stanley C. Eisenstat (Yale University, U.S.A.) The elimination tree of a nonsymmetric matrix: theory and applications  (Abstract)
Dan Halperin (Tel Aviv University, Tel Aviv, Israel) Controlled perturbation for certified geometric computing with fixed precision arithmetic  (Abstract)
Denis Trystram (IMAG, Grenoble, France) Efficient algorithms for scheduling the tasks of parallel programs  (Abstract)



Organizing committee:
Iain S. Duff (CERFACS, France and Rutherford Appleton Lab, UK)
John Gilbert (University of California, Santa Barbara, USA)
Alex Pothen (Old Dominion University, Norfolk, USA)
Patrick R. Amestoy (IRIT, Toulouse and ScAlApplix, INRIA, France)
Rob Bisseling (University of Utrecht, The Netherlands)
Andreas Griewank (Humboldt University, Berlin, Germany)
Jean-Yves L’Excellent (INRIA, Lyon, France)
Cynthia A. Phillips (Sandia National Labs, Albuquerque, USA)
Bryan Shader (University of Wyoming, Laramie, USA)

Industrial track coordinator:
Jean Roman (LaBRI, INRIA Futurs, France)

Local Committee:
Patrick R. Amestoy (IRIT, Toulouse and ScAlApplix, INRIA, France)
Iain S. Duff (CERFACS, France and Rutherford Appleton Lab, UK)
Luc Giraud (CERFACS, France)
Serge Gratton (CERFACS, France)
Brigitte Yzel (Administration)


First 360-degrees Large-Eddy Simulation of a full engine

Jérôme DOMBARD |  17 June 2020

Within the PRACE project FULLEST (First fUlL engine computation with Large Eddy SimulaTion), a joint collaboration between CERFACS, SAFRAN and AKIRA technologies, Dr. C. Pérez Arroyo (post doctoral fellow at CERFACS) has carried out under the supervision of Dr. J. Dombard the first high-fidelity simulation of a part of the real engine DGEN380 (for now, from the fan to the combustion chamber). This 360-degrees integrated large-eddy simulation contains around two billion cells on the three instances, carried out with the AVBP code of CERFACS.  The CPU cost is obviously large but still within reach, performing around one turn of fan during 5 days over 14400 skylake cores. Post-treatments are in progress and already show, among other complex phenomena, a strong interaction between the high pressure compressor and the combustion chamber (see forthcoming paper GT2020-16288 C. Pérez Arroyo et al). Below a video showing: in the fan an isosurface at mid-height of the vein colored by the Mach number, in the high pressure compressor a gradient of density, in the bypass of the combustion chamber the static pressure and in the flame tube a temperature field. One of the goals of the project is to create a high-fidelity unsteady database to study interactions between modules and may help other teams to develop new lower order models and/or validate existing ones. Beyond the feasibility and the maturity of the AVBP code, this kind of calculation is an important milestone for the aeronautical industry and would allow to apprehend earlier in the design the effect of integration and installation and thus, to reduce the cycle and therefore the cost of the future aircraft engines. PRACE and GENCI CPU ressources and Safran Tech/DGAC fundings are gratefully acknowledged, along with the invaluable technical support at CERFACS: Dr. G. Staffelbach, Dr. F. Duchaine, Dr. L. Gicquel, Dr....Read more

B. Cuenot distinguished as Program Chair of international Symposium on Combustion

superadmin |  29 May 2020

B. Cuenot has been distinguished as Program Chair for the 39th International Symposium on Combustion, to be held in Vancouver (Canada) in 2022. The International Symposium on Combustion is a major event for the combustion community, where the current best research is presented.Read more