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Teratec 2022 Forum
Wednesday, June 15 - Application Workshop

Workshop 03 - 9:00 to 12:30 pm

HPC and computer codes: a constantly evolving ecosystem
Chaired by Cyril BAUDRY, Architecte SI scientifique, EDF R&D et Jean-Albert Vilmer, Regional Director EMEA South, MSC Software Hexagon

Collaborative development of physical models in ProLB using dataflow programming
By Denis Ricot, PhD ProLB Technical Director, CS Group

ProLB is a fluid mechanics software, based on the Lattice Boltzmann Method (LBM) and developed by CS GROUP within the framework of a consortium of industrials and laboratories for over 10 years. It is a complete and powerful commercial CFD software used for example by Renault and Airbus on numerous applications. The architecture of the software was designed to meet a double challenge: to ensure excellent HPC performance and robustness of a code devoted to industrial usages and to propose a simple environment for the implementation of complex physical models by various research teams. The chosen solution is based on two pillars: a strict separation of the so-called "core functionality module” containing no physics and the “physics module” containing all the LBM, turbulence, boundary condition models on the one hand, and the use of the dataflow programming paradigm on the other. We will show how this architecture works, allowing the developers of physics schemes to implement complex algorithms without having to worry about parallelization, data structure management, inputs/outputs... The pros and cons of this solution will be discussed. Beyond the classical industrial applications already in production, some advanced examples will be shown implementing multi-species, combustion or fluid/structure coupling algorithms that are currently developed by some of our partners (ECL, Aix-Marseille University, Cerfacs or ONERA,...).

Biography : Graduate of the Ecole Centrale de Lyon and after a PhD thesis on the Lattice Boltzmann Method (LBM) applied to aeroacoustics applications, Denis started his career in 2003 in the Research Department of Renault. He develops experimental and numerical methods for the aerodynamics and aeroacoustics optimization of vehicles. In 2009, in partnership with CS GROUP and a dozen industrial and academic partners, he launched the collaborative project "LaBS" for the development of a CFD software based on LBM. He was responsible for the project management and the effective deployment of the LaBS software (now called ProLB in its commercial version) within Renault for 7 years, and then took over the responsibility of the CFD and vibro-acoustics method team of Renault. In 2017, he became the CFD and Aerodynamics Expert of the Renault Group. In 2021, he joined CS GROUP as Technical Director of the ProLB software.

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