# idaholab/moose

Multiphysics Object Oriented Simulation Environment

Repository: https://github.com/idaholab/moose
Canonical: https://ross.abutalabs.com/products/moose
Homepage: https://mooseframework.inl.gov
Language: C++
License: LGPL-2.1
License Family: copyleft
Topics: multiphysics, simulation, fem, finite-elements, object-oriented, parallel, amr, finite-volumes
Last push: 2026-08-26T21:25:57+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 4583, "days_push": 7, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2338, forks 1253 (observed 2026-08-28T04:06:38.492236+00:00)

## What it is
MOOSE is a finite-element, multiphysics simulation framework developed by Idaho National Laboratory, built on top of PETSc's nonlinear solver technology. It provides a high-level C++ API for building fully-coupled, fully-implicit multiphysics solvers that run automatically in parallel on everything from laptops to supercomputers with 100,000+ cores.

## Use cases
- simulate coupled multiphysics problems with finite elements
- build custom physics solvers on a parallel finite-element framework
- run large-scale simulations on HPC clusters
- solve nonlinear PDE systems with implicit coupling
- perform adaptive mesh refinement in simulations
- model heat transfer, mechanics, and fluid problems in one coupled solve
- develop dimension-independent physics applications
- run discontinuous Galerkin simulations

## When to choose
- you need fully-coupled multiphysics simulation with automatic parallelism
- you want a proven framework wrapping PETSc nonlinear solvers
- you need mesh adaptivity and mixed continuous/DG discretizations
- you're building simulation apps for research or engineering at scale
- you want modular, reusable physics components in C++

## When to avoid
- you need a simple one-off simulation without learning a framework
- you want a GUI-first commercial multiphysics tool like COMSOL
- your problem is not PDE-based or not suited to finite elements
- you need lightweight scripting rather than C++ application development
- you can't build large C++ dependencies like PETSc and libMesh

## Facets
- artifact type: framework
- maturity: stable
- function: simulation, gpu-computing
- domain: simulation
- platform: windows, cpp, cross-platform
- tags: finite-element-method, multiphysics, finite-volume, mesh-adaptivity, nonlinear-solver, petsc, scientific-simulation, hpc, solver, physics, engineering, scientific-computing, high-performance-computing, linux, macos

## Member repositories
- idaholab/moose (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:38.492236+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:37:32.233501+00:00, confidence not recorded.
  - readme: https://github.com/idaholab/moose (fetched 2026-08-28T04:06:38.492236+00:00, sha 9bcd43dad284)
- Data as of 2026-08-30T08:39:29.467469+00:00.