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Couplers developed at CERFACS

Coupling

Coupling numerical models is a central issue in many research fields such as climate modelling, computational fluid dynamics, atmospheric chemistry, etc.

Ideally, a coupler, i.e., the software interface between the different models, should allow the realization of coupled simulations on different types of platforms at a minimal cost, the  testing of different coupling algorithms (e.g. time strategy or interpolation methods), or to change the numerical modeling components that participate in the coupled simulation in order to realize coupled model intercomparisons. Two couplers are developed at CERFACS: OASIS and OpenPalm.

OASIS

OASIS3-MCT coupling

OASIS3-MCT coupling

The OASIS coupler « Ocean Atmosphere Sea Ice Soil » is a software allowing synchronized exchanges of coupling information between numerical codes representing different components of the climate system.

For further information :  site Web OASIS

Contact at CERFACS : Sophie Valcke

 

OpenPalm

OpenPALM coupling

OpenPALM coupling

 

OpenPalm is a software allowing the concurrent execution and the intercommunication of programs based on in-house as well as commercial codes. For climate modelling an ocean model could be coupled with and atmospheric model through OpenPalm, for a combustion chamber temperature simulation a combustion model could be coupled with a radiation model…

For further information : site Web OpenPalm

Contact at CERFACS : Thierry Morel

NEWS

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. We acknowledge PRACE for awarding us access to Joliot-Curie (Genci) hosted at CEA/TGCC, FRANCE, Safran Tech and DGAC fundings within the project ATOM, along with the invaluable technical support at...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

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