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HPC simulation of aerodynamics & aeroacoustic

The next generation of commercial aircraft will require an efficient design loop on which unsteady aerodynamics is heavily involved: these include aerodynamics and aeroacoustics on fixed and mobile surfaces such as landing gear, high-lift system, FAN, compressor, turbine, wind turbine and open-rotor. CERFACS proposed to reach this objective by means of high-fidelity CFD methods (based on Large Eddy Simulation -LES- approach), which represents a breakthrough compared to industrial standards, which are based on the steady or unsteady Reynolds-Averaged Navier Stokes (RANS) turbulence modelling. To make the use of LES in industry attractive, a lot of effort have to be done to reduce the CPU cost. Efforts must be made in different directions: numerical discretization (to get the best accuracy for a given CPU time), mesh generation, turbulence modelling, co-processing and HPC efficiency on different platforms (CPU and GPU).

Among all possible CFD approaches, CERFACS is involved in two promissing ones: Lattice Boltzmann Method (LBM) and high-order discontinuous approach such as Spectral Difference Method (SDM). CERFACS believe that these approaches have a great potential to dramatically reduce the simulation cost compared to traditional CFD formalisms. In this respect, comparisons are made with the standard CFD solvers available at CERFACS.

Here is an example of an aeroacoustic simulation around a full aircraft using an LBM approach. The use of Cartesian grid with immersed boundary method makes the use of LBM the most promising approach in term of restitution time for LES simulations.


Sparse Days in Saint-Girons IV

Brigitte Yzel |  29 March 2022

Sparse Days Meeting 2022 🗓️  20-22 June 2022  @ Saint-Girons, France   🌐   Sparse Days 2022 will be held in Saint-Girons, Ariège, from 20-22 June. This enhanced version of Sparse Days is being co-organized by Cerfacs and ENSEEIHT/IRIT. It will be the fourth meeting in Saint- Girons following the tradition of the previous meetings held in 1994, 2003, and 2015. The tradition involves coupling our highly successful annual technical meeting with the ambience and hospitality of this wonderful Pyrenean town which encourages fruitful informal exchanges between participants.    Read more

Press releases on the NextSim EuroHPC project

CERFACS |  9 February 2022

Press talks about the NextSim EuroHPC project. CERFACS is involved in two major points. The first topic is to extend the numerical capabilities of the code to perform scale-resolving simulations of jet noise configurations on exascale supercomputers. The second focus is to exploit data from these simulations by extracting or visualising relevant physical information during the computation. CERFACS is involved in the NextSim project (). The primary objective is to increase the capabilities of Computational Fluid Dynamics tools on extreme-scale parallel computing platforms for aeronautical design. This project has received funding from the European High-Performance Computing Joint Undertaking (JU) under grant agreement N° 956104. The JU receives support from the European Union’s Horizon 2020 research and innovation programme and Spain, France, Germany. This project has received funding from the Agence Nationale de la Recherche (ANR) under grant agreement N° ANR-20-EHPC-0002-02. For more information, please visit Read more