Cerfacs Entrez dans le monde de la haute performance...

Le Cerfacs en bref

Centre de recherche fondamentale et appliquée spécialisé dans la modélisation et la simulation numériques, également centre de formation avancée, le Cerfacs, par ses moyens et son savoir-faire en calcul haute performance, traite des grands problèmes scientifiques et techniques de recherche publique et industrielle sur les secteurs suivants: AERONAUTIQUE&AUTOMOBILEESPACEENERGIEENVIRONNEMENT&CLIMAT
Ses effectifs sont de l'ordre de 100-150 chercheurs, ingénieurs et administratifs.

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LES ACTUALITÉS

Prix d’hydrologie pour Gildas DAYON

12 janvier 2017

Gildas Dayon a reçu le prix Henri Milon 2016 (prix d'hydrologie) de la société Hydrotechnique de France pour sa thèse de doctorat intitulée "Évolution du cycle hydrologique continental en France au cours des prochaines décennies". Ces travaux ont été réalisés dans l'Unité Mixte de...Lire la suite


Meilleur article en combustion pour l'ASME 2016 pour une recherche IMFT faite avec AVBP

4 janvier 2017

Le papier ASME 2016 de Christian KRAUS (IMF Toulouse) a été choisi parmi les meilleurs articles ASME en combustion à la suite du congrès TurboExpo de Séoul, Corée en 2016. GT2016-56368 - Influence of Heat Transfer and Material Temperature on Combustion Instabilities in a Swirl Burner by...Lire la suite

Toute l'actualité

NOS PUBLICATIONS

Balaji, V., Maisonnave, E., Zadeh, E., Lawrence, B. N., Biercamp, J., Fladrich, U., Aloisio, G., Benson, R., Caubel, A., Durachta, J., Foujols, M. -A., Lister, G., Mocavero, S., Underwood, S. and Wright, G. (2017) CPMIP : Measurements of Real Computational Performance of Earth System Models in CMIP6, Geoscientific Model Development, 46, pp. 19-34, doi:10.5194/gmd-10-19-2017

[doi]

@ARTICLE{AR-CMGC-17-2, author = {Balaji, V. and Maisonnave, E. and Zadeh, E and Lawrence, B.N. and Biercamp, J. and Fladrich, U. and Aloisio, G. and Benson, R. and Caubel, A. and Durachta, J. and Foujols, M.-A. and Lister, G. and Mocavero, S. and Underwood, S. and Wright, G. }, title = {CPMIP : Measurements of Real Computational Performance of Earth System Models in CMIP6}, year = {2017}, volume = {46}, pages = {19-34}, doi = {10.5194/gmd-10-19-2017}, journal = {Geoscientific Model Development}}

Bidadi, S., Perez-Arroyo, C., Puigt, G. and Boussuge, J. -F. (2016) A high-order adaptive finite volume methodology for shock- turbulence interaction, Journal of Computational Physics

@ARTICLE{AR-CFD-16-141, author = {Bidadi, S. and Perez-Arroyo, C. and Puigt, G. and Boussuge, J.-F. }, title = {A high-order adaptive finite volume methodology for shock- turbulence interaction}, year = {2016}, journal = {Journal of Computational Physics}, abstract = {In the current study, a computationally efficient fully finite volume methodology for aeroacoustics of high-speed turbulent flows is proposed. The formulation consists of two main components: (1) the finite volume extension of a sixth-order finite difference compact scheme in conjunction with an eighth-order compact filter to remove grid-to-grid oscillations in smooth regions, and (2) a new adaptive nonlinear filtering technique to capture sharp discontinuities in the flow. The sensors of Bogey and Ducros are employed to control the dissipation of the nonlinear filter. Within the shock/dissipation region, the second-order minmod and fifth-order Monotonicity Preserving Approach (MPA) reconstruction algorithms are used to provide the required dissipation. For the minmod case, it is demonstrated that turbulent eddies passing through the shock zone are exposed to excess dissipation when the number of points per wavelength of the oncoming perturbation is approximately four times the size of the dissipation zone width. In order to mitigate the excess dissipation of the minmod filter, an alternate technique of controlling the velocity jump instead of the numerical viscosity of the nonlinear filter is suggested. The dispersion and dissipative properties of the methodology are analysed by employing the approximate dispersion relation (ADR). Then the dispersion-dissipation condition of Hu et al. is used to optimize the spectral behavior of the nonlinear filter. The new methodology together with the two versions of the minmod filter and the MPA filter are examined for several benchmark problems. The results for the modified-minmod and MPA filters show good agreement with the reference solutions. Moreover, the extra CPU cost due to the shock filtering technique is limited, and is shown to be lower than the ones estimated in previous studies. }, keywords = {elsA, Finite volume, Shock-capturing, Shock filter, Spatial filter, Compact scheme, Shock sensor, Computational aeroacoustics}}

Urbano, A., Douasbin, Q., Selle, L., Staffelbach, G., Cuenot, B., Schmitt, T., Ducruix, S. and Candel, S. (2016) Study of flame response from the Large-Eddy Simulation of a 42-injector rocket engine, Proceedings of the Combustion Institute, 36, doi:10.1016/j.proci.2016.06.042

[doi]

@ARTICLE{AR-CFD-16-192, author = {Urbano, A. and Douasbin, Q. and Selle, L. and Staffelbach, G. and Cuenot, B. and Schmitt, T. and Ducruix, S. and Candel, S. }, title = {Study of flame response from the Large-Eddy Simulation of a 42-injector rocket engine}, year = {2016}, volume = {36}, doi = {10.1016/j.proci.2016.06.042}, journal = {Proceedings of the Combustion Institute}}

Felden, A., Riber, E. and Cuenot, B. (2016) Effect of the chemistry description on LES of a realistic swirled non-premixed combustor, Proceedings of the Combustion Institute, 36

@ARTICLE{AR-CFD-16-170, author = {Felden, A. and Riber, E. and Cuenot, B. }, title = {Effect of the chemistry description on LES of a realistic swirled non-premixed combustor}, year = {2016}, volume = {36}, journal = {Proceedings of the Combustion Institute}}

Emery, C., Biancamaria, S., Boone, A., Garambois, P. -A., Ricci, S., Rochoux, M. and Decharme, B. (2016) Temporal Variance-Based Sensitivity Analysis of the River-Routing Component of the Large-Scale Hydrological Model ISBA-TRIP: Application on the Amazon Basin, Journal of Hydrometeorology, 17 (12), pp. 3007-3027, doi:10.1175/JHM-D-16-0050.1

[url] [doi]

@ARTICLE{AR-CMGC-16-305, author = {Emery, C. and Biancamaria, S. and Boone, A. and Garambois, P.-A. and Ricci, S. and Rochoux, M. and Decharme, B. }, title = {Temporal Variance-Based Sensitivity Analysis of the River-Routing Component of the Large-Scale Hydrological Model ISBA-TRIP: Application on the Amazon Basin}, year = {2016}, number = {12}, volume = {17}, pages = {3007-3027}, doi = {10.1175/JHM-D-16-0050.1}, journal = {Journal of Hydrometeorology}, abstract = {The continental part of the water cycle is commonly represented with hydrological models. Yet, there are limits in their capacity to accurately estimate water storage and dynamics because of their coarse spatial resolution, simplified physics, and an incomplete knowledge of atmospheric forcing and input parameters. These errors can be diminished using data assimilation techniques. The model’s most sensitive parameters should be identified beforehand. The objective of the present study is to highlight key parameters impacting the river-routing scheme Total Runoff Integrating Pathways (TRIP) while simulating river water height and discharge as a function of time focusing on the annual cycle. Thus, a sensitivity analysis based on the decomposition of model output variance (using a method called ANOVA) is utilized and applied over the Amazon basin. Tested parameters are perturbed with correcting factors. First, parameter-correcting coefficients are considered uniform over the entire basin. The results are specific to the TRIP model and show that geomorphological parameters explain around 95\% of the water height variance with purely additive contributions, all year long, with a dominating impact of the river Manning coefficient (40\%), the riverbed slope (35\%), and the river width (20\%). The results also show that discharge is essentially sensitive to the groundwater time constant that makes up more than 90\% of the variance. To a lesser extent, in rising/falling flow period, the discharge is also sensitive to geomorphological parameters. Next, the Amazon basin is divided into nine subregions and the sensitivity analysis is carried out for regionalized parameter-correcting coefficients. The results show that local-region parameters impact water height, while upstream-region parameters affect discharge. }, url = {http://dx.doi.org/10.1175/JHM-D-16-0050.1}}

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LE CERFACS RECRUTE

Dissociation de l'air lors de la rentrée atmosphérique

 

CONTEXTE Divers types d’objets sont sujets à rentrer dans l’atmosphère en fin de mission. Dans certains cas, cette rentrée doit être...Lire plus


Ingénieur de recherche – Modélisation et assimilation de données d’altimétriques en hydraulique fluviale

 

Le Centre Européen de Recherche et de Formation Avancée en Calcul Scientifique (CERFACS) s'intéresse à la modélisation du climat et de ses...Lire plus

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