MOOSE Newsletter (June 2026)

2026.06.05_ab36c00 Update

• Improved threaded code

  • Added MeshBase::element_stored_range() and MeshBase::active_local_element_stored_range(), which return on-the-fly-assembled cached ranges of elements suitable for threaded mesh modification or evaluation code, respectively

  • Multithreading is now employed, when multiple threads are available at runtime, in dozens of library element loops which were previously only either serial or MPI-parallel

  • Added Threads::active_threads, tracking how many threads are currently in use in a multithreaded code path

  • Expanded assertions in non-thread-safe PerfLog stack code, to catch accidental use (in devel and dbg builds) within codepaths multithreaded via direct OpenMP APIs, not just via the libMesh::Threads thread interface.

• Fixed Elem::side_vertex_average_normal() on p-refined meshes, and added unit test coverage

• Fixed missing boundary name in verbose mesh stitching console output

• Fixed MeshFunction::discontinuous_value() in "out-of-mesh mode"

• Fixed MeshGeneration::build_sphere() in distributed-mesh cases

• Improved configuration options: users can now properly request C++ standard versions newer than C++17, and do not get unwanted GNU extensions.

• Added support for polygonal and polyhedral elements to MeshTools::Modification::all_tri(), along with unit test coverage

• Added MeshTools::Modification::all_rbb(), to create optimal Rational-Bezier-Bernstein remappings (including isogeometric mappings, for special cases like circles and aligned cylinders) of previously-Lagrange-mapped meshes, along with unit test coverage

• Made SparseMatrix::init_without_preallocation() and SparseMatrix::finish_initialization() public, for PetscMatrix users who want to use hash-table-based matrix assembly for matrices which are non-square or which for other reasons do not match the DofMap indexing

• Added circumcenter(p0, p1, p2) method, along with unit test coverage

• Updated qhull support to use the newest version, via a git submodule

• Made MeshTools::n_connected_components() much faster

• Made ReferenceCounter always print detailed information whenever a leaked ReferenceCountedObject is detected

• Fixes for warnings when certain versions of clang++ are used with higher C++ standard versions specified

• Fixes for configuration with Intel 2026 compilers

• Fix VariationalMeshSmoother logic that determines nodal constraints

• Make Threads:: pthreads backend respect grainsize and make grainsize runtime-configurable

moose-petsc 3.25.2 [mpich,openmpi]_0

• Rebuild due to updated pins in conda/conda_build_config.yaml

• Update petsc v3.25.1..v3.25.2

• Remove specific --download-umpire-commit in petsc configure

• Patch scalapack-targets.cmake on Mac

moose-libmesh-vtk 9.6.2 [mpich,openmpi]_0

• Rebuild due to updated pins in conda/conda_build_config.yaml

• Update VTK from 9.6.1 to 9.6.2

moose-libmesh 2026.06.05_ab36c00 [mpich,openmpi]_0

• Rebuild due to updated pins in conda/conda_build_config.yaml

• Update libmesh aeab0b9..ab36c00

• Use updated moose-petsc dependency moose-petsc 3.25.2 [mpich,openmpi]_0

• Use updated moose-libmesh-vtk dependency moose-libmesh-vtk 9.6.2 [mpich,openmpi]_0

moose-wasp 2026.05.24_2cdbeb7 build_0

• Rebuild due to updated pins in conda/conda_build_config.yaml

• Update wasp 09054a2..2cdbeb7

moose-pyhit 2026.06.07

• Rebuild due to updated pins in conda/conda_build_config.yaml

• Use updated moose-wasp dependency moose-wasp 2026.05.24_2cdbeb7 build_0

moose-build 2026.06.07

• Rebuild due to updated pins in conda/conda_build_config.yaml

• Fix issue with activation script on zsh

moose-tools 2026.06.07

• Rebuild due to updated pins in conda/conda_build_config.yaml

• Update black from 26.1.0 to 26.5.1

• Update clang-format to 22.1.5

• Update ruff to 0.15.15

• Remove clang-tools

moose-dev 2026.06.07 [mpich,openmpi]

• Rebuild due to updated pins in conda/conda_build_config.yaml

• Use updated moose-petsc dependency moose-petsc 3.25.2 [mpich,openmpi]_0

• Use updated moose-libmesh dependency moose-libmesh 2026.06.05_ab36c00 [mpich,openmpi]_0

• Use updated moose-build dependency moose-build 2026.06.07

• Use updated moose-tools dependency moose-tools 2026.06.07