v2.2.0

🚀 Release v2.2.0

This release introduces adaptive mesh refinement, new advection and source term integrators, the MUMPS parallel direct solver and more flexible coefficients, along with performance improvements, a streamlined installation procedure and an extensively updated documentation.

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✨ New Features

🔲 Adaptive Mesh Refinement

• Adaptive Mesh Refinement (AMR) support by @CINTROINI in #167
• Make all variables visible during refinement/derefinement by @CINTROINI in #171
• MPI load balancing, estimator lifetime and pilot variables for AMR by @CINTROINI and @ascapini in #197

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🧩 SLOTH Coefficients

• Time-dependent coefficients read from CSV files by @CINTROINI in #185
• Coefficients depending on spatial coordinates (JSON coordinates key) by @CINTROINI in #188

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🔧 Integrators, Solvers & Boundary Conditions

• Source term and advection integrators (SourceTerm, Advection, SplitAdvection, inflow/outflow) by @CINTROINI in #190
• Support for the MUMPS parallel sparse direct solver by @CINTROINI in #184
• Variable Dirichlet boundary conditions by @marineharel in #166

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📊 Post-processing

• Post-processing enhancement: common output directory and single ParaView file for multiphysics simulations, and optional post-processing by @CINTROINI in #169
• Coefficient VTK post-processing and simplified multiphase test setup by @CINTROINI in #176

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⚡ Performance

• Evaluate fields once per element in volume integrators and compute energy gradients once per element by @CINTROINI in #193
• Avoid per-step rebuilds in monolithic explicit solves by @CINTROINI in #192

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⚙️ Compilation & Deployment

• Optimisation of the installation procedure by @CINTROINI in #189
• Release preparation: dependency cleanup (unused SuiteSparse removed), updated Spack script, envSloth.sh and CMakeLists.txt, Topaze offline build cloning SLOTH from GitHub, and Linux CI fixes by @CINTROINI in #195

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🛠️ Bug Fixes

• Fix monolithic explicit solve by @CINTROINI in #192
• Correct unified VTK save frequency by @CINTROINI in #178
• Fix compatibility between AMR and unified VTK file by @CINTROINI in #173

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📝 Documentation

🔲 Adaptive Mesh Refinement

• New AMR documentation with a spinodal decomposition example (animated GIF) by @CINTROINI
• Parameters in AMR description by @CINTROINI in Collab4Sloth/Documentation#55

🧩 Coefficients

• File-based (CSV) coefficients by @CINTROINI
• Coordinate-dependent coefficients by @CINTROINI in Collab4Sloth/Documentation#60

🔧 Integrators & Solvers

• Advection, source terms and rising bubble example (Cahn-Hilliard example 6) by @CINTROINI in Collab4Sloth/Documentation#63 and Collab4Sloth/Documentation#64
• Supported linear solvers documented by @CINTROINI

📊 Post-processing

• Post-processing evolutions by @CINTROINI in Collab4Sloth/Documentation#56
• Test setup simplification and Coefficient VTK post-processing by @CINTROINI in Collab4Sloth/Documentation#57
• Document specialized_frequency and fix the enable_save_specialized_at_iter default by @CINTROINI in Collab4Sloth/Documentation#65

🎓 Tutorials

• New input-file and Coefficients/Sympy tutorials (web pages and PDF slides) by @CINTROINI in Collab4Sloth/Documentation#62

⚙️ Installation

• New page "Using an installed SLOTH", Spack installation of SLOTH and up-to-date envSloth.sh options by @CINTROINI in Collab4Sloth/Documentation#61
• Updated installation procedures and guides for v2.2.0, including the voro++ variant by @CINTROINI in Collab4Sloth/Documentation#66

📚 Reference

• Updated Doxygen documentation by @CINTROINI in Collab4Sloth/Documentation#67
• MFEM links added as references by @CINTROINI
• Solver support consistent with the user manual by @CINTROINI in #186

Full Changelog: v2.1.0...v2.2.0