We are proud to announce the release of code_saturne v9.1.0 (December 30, 2025), the latest evolution of code_saturne, the powerful open-source CFD software developed by EDF for fluid flow, heat transfer, and multiphysics simulation.
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This new version delivers significant improvements in computational fluid dynamics (CFD), Lagrangian particle tracking, heat transfer modeling, and fluid-structure interaction (FSI), reinforcing code_saturne as a reference platform for advanced numerical simulation.
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Key Highlights of code_saturne 9.1
- Log-normal particle diameter distribution in the Lagrangian module
- New cs_mesh_cut operator for advanced mesh cell cutting by planes
- Anisotropic conductivity support in the CDO-based heat transfer solver
- Runge-Kutta time integration schemes
- Enhanced fluid-structure interaction with external solver support
- Major improvements in rough wall functions and atmospheric modeling
- Cooling tower module coupled with Lagrangian particle tracking
- New Soil-Plant-Atmosphere Continuum model for environmental CFD applications
- Full transition away from legacy Fortran user functions
- Extensive numerical improvements, architectural upgrades, and bug fixes
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Version 9.1 also introduces modern C++ data structures (cs::array, cs::span, cs::mdspan), rewritten advection schemes, improved turbulence and thermal stratification modeling, and enhanced stability for Lagrangian stochastic methods.
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Compatibility with previous checkpoints is maintained, ensuring smooth upgrades for existing users.
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Explore the full release notes