🌟 MFEM 4.7 Released

[tzanio]

Dear MFEM community,

Version 4.7 of MFEM was released on May 7, 2024. Some of the new additions in this release are:

• Support for single and double precision builds (with corresponding hypre build). The MFEM floating point type was generalized from double to real_t. For details see https://github.com/orgs/mfem/discussions/4207.

• Capability to partition (big) serial meshes in serial code, see the new classes MeshPartitioner and MeshPart. This capability is also exposed as a menu option in the mesh-explorer miniapp in miniapps/meshing.

• Domain and boundary attributes in the Mesh class can be now named, as a convenient means of referring to them. See the new Example 39, the MFEM mesh v1.3 format documentation, and the data/compass.mesh.

• NURBS meshes can now be refined by arbitrary integer factors, see e.g. the new options in mesh-explorer. NURBS coarsening and knot removal were also introduced.

• Added a new integrator, HyperbolicFormIntegrator, for general systems of hyperbolic conservation laws. Currently, advection, Burgers, shallow-water and Euler equations are available. See the updated Example 18 and fem/hyperbolic.hpp.

• Cut-surface and cut-volume IntegrationRules can now be constructed by a moment-fitting approach. The cut is specified by the zero level set of a Coefficient. See fem/intrules_cut.hpp and the new Example 38.

• Added new block solver for the Darcy problem based on Bramble-Pasciak preconditioning.

• MFEM's runtime compute policy can now be automatically synced with hypre's runtime compute policy. This enables runtime device selection with hypre-2.31.0 or later.

• GPU support has been extended to the DG diffusion integrator, LOR assembly on surface meshes, full assembly on simplices and a new miniapp for LOR block preconditioning for linear elasticity.

• Added a miniapp demonstrates elastic mortar-based contact using the Tribol library.

• Updated the Doxygen documentation style, which now requires Doxygen version 1.9.8 or later. See the doc directory and the online documentation.

To download, and for more information visit https://mfem.org.

We welcome any and all feedback at https://github.com/mfem/mfem/issues.

--the MFEM team

cc: @mfem/everyone