ECFD workshop, 9th edition, 2026
Contents
Description
- Event from 19th of January to 30th of January 2026
- Location: Centre Sportif de Normandie, Houlgate, near Caen (14)
- Two types of sessions:
- common technical presentations: roadmaps, specific points
- mini-workshops. Potential workshops are listed below
- Free of charge
- Participants from academics, HPC center/experts and industry are welcome
- The number of participants is limited to 80.
- Organizers
- Guillaume Balarac (LEGI), Simon Mendez (IMAG), Pierre Bénard, Vincent Moureau, Léa Voivenel (CORIA).
News
- 22/09/2025: First announcement of the 9th Extreme CFD Workshop & Hackathon !
- 15/11/2025: Deadline to submit your project
Thematics / Mini-workshops
To be announced...
Projects
The projects will be selected after the end of the submission phase (end of November).
Numerics & User Interface - M. Bernard (LEGI), G. Lartigue (CORIA) & S. Mendez (IMAG)
N6 - Relaxation of the IBM stability constraint, PL. Martin, S. Mendez (IMAG)
Many simulations done in the YALES2BIO framework involve fluid-structure interactions handled with the Immersed Boundary Method (IBM). This model allows for the fluid/solid coupling, with the forces from the solid acting as a source term in the Navier-Stokes equations. In some cases for red blood cells simulations, and for most cases for von Willebrand Factor simulations, the governing time step is the force time step. When this is the case, we also notice artifacts in the fluid velocity and pressure fields. The robustness of our IBM implementation was improved for embedded surfaces by shifting our regularization/interpolation kernels away from the wall in case we work with an embedded solid. Since these simulations are done at low Reynolds and CFL number (0.01 - 0.001), the stability constraint was relaxed by doing substeps without: 1. advancing the convective velocity, 2. correcting the velocity to make it divergence-free. The artifacts showing when solids are a lot stiffer than the fluid viscous forces were reduced by projecting the regularized solid forces into a divergence-free space.
