Truchas is open source software developed by Los Alamos National Laboratory (LANL) and collaborators for physics-based modeling and simulation of manufacturing processes. Its core capabilities are primarily geared toward metal casting, with developing capabilities for metal additive manufacturing. It is, however, a general multi-physics computational tool that is useful for a wider range of applications.

Truchas includes coupled physics models for incompressible multi-material flow with interface tracking, heat transfer, phase change, view factor thermal radiation, species advection-diffusion, elastic/plastic mechanics with contact, and electromagnetics. It uses conventional 3-D unstructured finite element computational meshes composed of mixed element types, and employs finite volume, finite element, and mimetic finite difference discretizations.

Truchas is made available under the 3-clause BSD license. See LICENSE.md for details.

• The Truchas website https://www.truchas.org has links to documentation, binary packages, and other materials.
• The official Truchas source repository is https://gitlab.com/truchas/truchas
• Use the issue tracker to submit bug reports and feature suggestions.
• Mailing list: https://groups.io/g/truchas
• Chat with us on Zulip:

See NEWS.md for important changes since the last release.

See BUILDING.md for instructions on compiling and testing Truchas. See SPACK.md for instructions on using spack to build Truchas