I'm Lucas Esclapez.-image

I'm Lucas Esclapez.

I am Research Software Engineer and a Computational Scientist based in the Netherlands, currently working at the Netherlands eScience Center in Amsterdam.

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about-me-image

About me

I'm an research software engineer, with a PhD in fluid mechanics and energetics, and a broad interest in scientific computing. Over the years, I have worked on multiple scientific softwares with a common denominator: the need to crush large amount of data using large high performance computing (HPC) platforms.

  • Location:Leiden, Netherlands
  • Age:36
  • Nationality:French
  • Interests:Drums, rock climbing, reading, cooking
  • Study:PhD, INP Toulouse, France
  • Employment:Netherlands eScience Center.
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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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Get in touch.

Feel free to reach out if something on the page caught your eye.

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