About me
I'm an HPC advisor, with a PhD in fluid mechanics and energetics, and a broad interest in scientific computing. Over the years, I have contributed to multiple scientific softwares with a common denominator: the need to process large amount of data using large high performance computing (HPC) platforms. I am enthousiastic about developing and improving research softwares for academic and industrial applications, leveraging both software engineering and applied mathematic skills.
- Location:Leiden, Netherlands
- Age:36
- Nationality:French
- Interests:Drums, rock climbing, reading, cooking
- Study:PhD, INP Toulouse, France
- Employment:Netherlands eScience Center.
Accelerating atmospheric simulations with OpenACC
Within ESiWACE3, we collaborated with the Dutch Atmospheric LES (DALES) developers to port the solver to GPUs. To minimize disruption to the Fortran90 code base while enabling significant speed-up, we employed OpenACC. On a node basis, we obtained a ~12x speedup on H100 NVidia GPUs on the Snellius cluster (SURF). An overview of the work and performances is available on the link below.
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Rare events sampling in geophysical high-dimentional dynamical systems
The Atlantic ocean circulation plays a key role in the global redistribution of heat and its potential collapse has been identified as a major tipping climatic event. We worked with the team lead by H. Dijkstra in Utrecht to apply for the first time trajectory-adaptive multi-level sampling (TAMS) to a global circulation model POP in order to predict collapse probability before 2100.
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ExaScale-ready time integrators for many-ODEs systems
Reactive flow simulations involve the integration of a stiff ODE system representing the chemical decomposition of a fuel. In collaboration with the SUNDIALS team at LLNL (USA), we integrated a several ODE integrators into the Pele framework to enable high-throughput chemical integration. This was a key ingredient in achieving efficient combustion simulations at ExaScale, i.e. 3/4 of Frontier.
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Pele: reactive flow simulations at the ExaScale
Within the ExaScale Computing Project (ECP), we developed the Pele suite, a suite of CFD softwares comprising a low-Mach and a compressible Navier-Stokes solvers as well as a shared library for chemistry, transport and multiphsyics modules. Built upon AMReX, an Adaptive Mesh Refinement library, the Pele suite is the first ExaScale ready CFD solver for chemicaly reactive flows.
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Developing a numerical simulation framework for flame/plasma interactions
Simulation of flame/plasma interactions are computationnally expensive due to the large space and time scales separation between the various processes involved: from the fast moving electrons within the flame front to the large scale slow motion of the flame plume. At LBNL, I worked on a simulation framework based on the low-Mach number solver PeleLMeX to step over fast electron time scale in order to capture the slow effect of ion wind of laminar flames.
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Feel free to reach out if something on the page caught your eye.
- Location
- Leiden, Netherlands
- Github
- esclapez