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Centre of basic and applied research specialized in modelling and numerical simulation, Cerfacs, through its facilities and expertise in high-performance computing, deals with major scientific and technical research problems of public and industrial interest.

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NEWS

T. Poinsot to become Editor in Chief of Combustion and Flame in october 2016

superadmin |  21 September 2016

P. Dagaut (Orleans) will be replaced by T. Poinsot as Editor in Chief of Combustion and Flame in october 2016. The editorial work of Combustion and Flame is performed by two offices: one in the US (Pr F. Egolfopoulos) and one in Europe. More than 800 manuscripts are submitted every year from the...Read more


CERFACS present at the European Researchers' Night

ROGEL |  6 September 2016

This year, in Toulouse, the European Researchers’ Night will take place on Friday, September 30th from 6 pm to midnight, at Quai des Savoirs and Muséum d’histoire naturelle. What is planned? experiments in live, fun science experiments for kids, speed-searching, Top chrono for my PhD… Come...Read more

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CALENDAR

No event has been found

Mon

03

Oct

From 3 October 2016 to 7 October 2016

Numerical methods for Large Eddy Simulation

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Thu

06

Oct

The 6 October 2016 at 11h00

Wide Interest Seminar: Eric Pardyjak

SALLE DE CONFÉRENCE JEAN-CLAUDE ANDRÉ


Mon

10

Oct

From 10 October 2016 to 12 October 2016

Code coupling using OpenPALM

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RESEARCH PUBLICATIONS

Brebion, M., Mejia, D., Xavier, P., Duchaine, F., Bédat, B., Selle, L. and Poinsot, T. (2016) Joint experimental and numerical study of the influence of flame holder temperature on the stabilization of a laminar methane flame on a cylinder, Combustion and Flame, 172, pp. 153-161, ISSN 0010-2180, doi:10.1016/j.combustflame.2016.06.025

[url] [doi]

@ARTICLE{AR-CFD-16-186, author = {Brebion, M. and Mejia, D. and Xavier, P. and Duchaine, F. and Bédat, B. and Selle, L. and Poinsot, T. }, title = {Joint experimental and numerical study of the influence of flame holder temperature on the stabilization of a laminar methane flame on a cylinder}, year = {2016}, volume = {172}, pages = {153-161}, issn = {0010-2180 }, doi = {10.1016/j.combustflame.2016.06.025}, journal = {Combustion and Flame}, abstract = {The mechanisms controlling laminar flame anchoring on a cylindrical bluff-body are investigated using DNS and experiments. Two configurations are examined: water-cooled and uncooled steel cylinders. Comparisons between experimental measurements and DNS show good agreement for the flame root locations in the two configurations. In the cooled case, the flame holder is maintained at about 300 K and the flame is stabilized in the wake of the cylinder, in the recirculation zone formed by the products of combustion. In the uncooled case, the bluff-body reaches a steady temperature of about 700 K in both experiment and DNS and the flame is stabilized closer to it. The fully coupled DNS of the flame and the temperature field in the bluff-body also shows that capturing the correct radiative heat transfer from the bluff-body is a key ingredient to reproduce experimental results.}, keywords = {DNS, Conjugate heat transfer, Analytical chemistry, Radiative transfer, Stabilization, Premixed flame}, url = {http://www.sciencedirect.com/science/article/pii/S0010218016301535}}

Aillaud, P., Duchaine, F., Gicquel, L. Y. M. and Didorally, S. (2016) Secondary peak in the Nusselt number distribution of impinging jet flows: A phenomenological analysis, Physics of Fluids, 28 (10)

@ARTICLE{AR-CFD-16-211, author = {Aillaud, P. and Duchaine, F. and Gicquel, L.Y.M. and Didorally, S. }, title = {Secondary peak in the Nusselt number distribution of impinging jet flows: A phenomenological analysis}, year = {2016}, number = {10}, volume = {28}, journal = {Physics of Fluids}, abstract = {This paper focuses on a wall-resolved Large Eddy Simulation (LES) of an isothermal round submerged air jet impinging on a heated flat plate, at a Reynolds number of 23 000 (based on the nozzle diameter and the bulk velocity at the nozzle outlet) and for a nozzle to plate distance of two jet diameters. This specific configuration is known to lead to a non-monotonic variation of the temporal-mean Nusselt number as a function of the jet center distance, with the presence of two distinct peaks located on the jet axis and close to two nozzle diameters from the jet axis. The objectives are here twofold: first, validate the LES results against experimental data available in the literature and second to explore this validated numerical database by use of high order statistics such as Skewness and probability density functions (PDF) of the temporal distribution of temperature and pressure to identify flow features at the origin of the second Nusselt peak. Skewness of the pressure temporal distribution reveals the rebound of the primary vortices located near the location of the secondary peak and allows to identify the initiation of the unsteady separation linked to the local minimum in the mean heat transfer distribution. In the region of mean heat transfer enhancement, joint velocity-temperature analyses highlight that the most probable event is a cold fluid flux towards the plate produced by the passage of the vortical structures. In parallel, heat transfer distributions, analyzed using similar statistical tools, allow to connect the above mentioned events to the heat transfer on the plate. Thanks to such advanced analyses the origin of the double peak is confirmed and connected to the flow dynamics.}}

Labarrère, L., Poinsot, T., Dauptain, A., Duchaine, F., Bellenoue, M. and Boust, B. (2016) Experimental and numerical study of cyclic variations in a Constant Volume Combustion chamber, Combustion and Flame, 172 (October 2016), pp. 49-61, ISSN 0010-2180

[url]

@ARTICLE{AR-CFD-16-167, author = {Labarrère, L. and Poinsot, T. and Dauptain, A. and Duchaine, F. and Bellenoue, M. and Boust, B. }, title = {Experimental and numerical study of cyclic variations in a Constant Volume Combustion chamber}, year = {2016}, number = {October 2016}, volume = {172}, pages = {49-61}, issn = {0010-2180}, journal = {Combustion and Flame}, abstract = {This paper describes a joint experimental and numerical study of a Constant Volume Combustion (CVC) chamber for propulsion engines. Combustion takes place in a constant volume vessel where gases are injected from a pressurized air inlet using valves. They are ignited using a spark and exhaust through a second set of valves. Like piston engines, CVC combustion raises multiple questions linked to the volumetric efficiency of the valves, the heat losses to the chamber walls, the ignition in a strongly turbulent flow, the influence of residual gases. These issues can compromise the potential gains associated to constant volume combustion. They are investigated in an experimental setup and compared to a full compressible LES. The major conclusion is the existence of significant cyclic variations which are observed in the experiment and analyzed in the LES: the local flow velocity at spark timing and the level of residuals are the major factors leading to cyclic variations. Cycles also appear to be coupled: combustion during cycle N directly affects cycle (N+1), more than in a piston engine.}, keywords = {Turbulent flames}, url = {http://dx.doi.org/10.1016/j.combustflame.2016.06.027}}

Serazin, G., Meyssignac, B., Penduff, T., Terray, L., Barnier, B. and Molines, J. M. (2016) Quantifying uncertainties on regional sea level change induced by multi-decadal intrinsic oceanic variability, Geophysical Research Letters, 43, pp. 8151–8159, doi:10.1002/2016GL069273

[pdf] [doi]

@ARTICLE{AR-CMGC-16-205, author = {Serazin, G. and Meyssignac, B. and Penduff, T. and Terray, L. and Barnier, B. and Molines, J.M. }, title = {Quantifying uncertainties on regional sea level change induced by multi-decadal intrinsic oceanic variability}, year = {2016}, volume = {43}, pages = {8151–8159}, doi = {10.1002/2016GL069273}, journal = {Geophysical Research Letters}, pdf = {http://cerfacs.fr/wp-content/uploads/2016/09/GLOBC-Article-Serazin_et_al_GRL_2016.pdf}}

Davin, E., Maisonnave, E. and Seneviratne, S. (2016) Is land surface processes representation a possible weak link in current Regional Climate Models ?, Environmental Research Letters, 11 (7), pp. 74027, doi:10.1088/1748-9326/11/7/074027

[pdf] [doi]

@ARTICLE{AR-CMGC-16-208, author = {Davin, E. and Maisonnave, E. and Seneviratne, S. }, title = {Is land surface processes representation a possible weak link in current Regional Climate Models ?}, year = {2016}, number = {7}, volume = {11}, pages = {074027}, doi = {10.1088/1748-9326/11/7/074027}, journal = {Environmental Research Letters}, pdf = {http://cerfacs.fr/wp-content/uploads/2016/09/Article-Maisonnave-Globc-2016-sept-is-land.pdf}}

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JOBS OFFERS

Ensemble methods for history matching in reservoir modelling

20 September 2016 |  

CERFACS is recruiting a researcher with experience in data assimilation, if possible on ensemble methods (e.g....

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Codes acoustiques pour prévoir les instabilités de combustion dans les turbines à gaz EN

17 July 2016 |  

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