libROM is a free, lightweight, scalable C++ library for data-driven physical simulation methods. It is the main tool box that the reduced order modeling team at LLNL uses to develop efficient model order reduction techniques and physics-constrained data-driven methods. We try to collect any useful reduced order model routines, which are separable to the high-fidelity physics solvers, into libROM. Plus, libROM is open source, so anyone is welcome to suggest new ideas or contribute to the development. Let's work together for better data-driven technology!
Features
- Proper Orthogonal Decomposition (libROM, pylibROM)
- Dynamic mode decomposition (libROM, pylibROM)
- Projection-based reduced order models (libROM, pylibROM)
- Hyper-reduction (libROM, pylibROM)
- Greedy algorithm (libROM, pylibROM)
- Latent space dynamics identification (LaSDI, gLaSDI, GPLaSDI)
- Domain decomposition nonlinear manifold reduced order model (DD-NM-ROM)
Many more features will be available soon. Stay tuned!
libROM is used in many projects, including BLAST, ARDRA, Laghos, SU2, ALE3D and HyPar. Many MFEM-based ROM examples can be found in Examples.
See also our Gallery, Publications and News pages.
Recent News
| Date | Message |
|---|---|
| July 2, 2025 | Podcast on defining foundation model is available |
| June 24-27, 2025 | Kevin Chung presented LaSDI-IT at 54th International Annual Conference of the Fraunhofer ICT |
| June 19, 2025 | Youngsoo Choi presented DD-FEM at Large-Scale Scientific Computations Conference |
| June 10-12, 2025 | Youngsoo Choi led a breakout session at DOE ASCR Workshop on Inverse Methods for Complex Systems under Uncertainty |
| June 10, 2025 | Parametric tLaSDI arXiv paper is available |
| June 10, 2025 | mLaSDI arXiv paper is available |
| May 30, 2025 | Defining Foundation Model arXiv paper is available |
| May 5, 2025 | ROM for DED control paper is published in Additive Manufacturing |
libROM tutorials in YouTube
| Date | Title |
|---|---|
| July 22, 2021 | Poisson equation & its finite element discretization |
| Sep. 1, 2021 | Poisson equation & its reduced order model |
| Sep. 23, 2021 | Physics-informed sampling procedure for reduced order models |
| Sep. 11, 2022 | Local reduced order models and interpolation-based parameterization |
| Sep. 23, 2022 | Projection-based reduced order model for nonlinear system |
| Aug. 23, 2023 | Complete derivation of dynamic mode decomposition |
Latest Release
Examples ┊ Code documentation ┊ libROM Sources ┊ pylibROM Sources ┊ LaghosROM Sources ┊ ScaleupROM ┊ LaSDI Sources ┊ gLaSDI Sources ┊ GPLaSDI Sources ┊ DD-NM-ROM Sources ┊ NM-ROM Sources ┊ WLaSDI ┊ tLaSDI ┊ gappyAE
Documentation
Building libROM ┊ Poisson equation ┊ Greedy for Poisson
New users should start by examining the example codes and tutorials.
We also recommend using GLVis or VisIt for visualization.
Contact
Use the GitHub issue tracker to report bugs or post questions or comments. See the About page for citation information.