ug4 is a simulation framework, targeted at the solution of differential equations on unstructured hybrid grids in 1, 2 and 3 dimensions on systems reaching from laptops to massively parallel systems. ug4 is written in C++, striving for a flexible, yet fast and robust simulation environment.

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Some core features are:

• Efficient parallel solvers: Iterative Solvers, Preconditioners, Geometric and Algebraic Multgrid, Sparse LU Decomposition and more.
• A flexible discretization module, allowing to freely couple equations, input and output parameters, even on scripting level.
• An efficient extensible grid manager supporting distributed adaptive hybrid multigrids in 1, 2 and 3 dimensions. Supported element types are vertices, edges, triangles, quadrilaterals, tetrahedra, hexahedra, prisms and pyramids.
• A flexible algebra independent from grid and discretization designed to swap the core functions to support double/single precision, systems of equations and GPGPUs.
• A parallelization layer based on MPI which allows efficient communication on distributed hierarchical graphs. Scalability has been shown for up to 256ki processes
• ug4 is backed up by several powerful tools like ProMesh (meshing software), the ConnectionViewer (used to inspect matrix connections), or the integrated profiler (Shiny extended by output and analyzation tools).
• A flexible plugin system to extend ug4 functionality without the need to dive into the specifics of ug4's implementation
• Simulation results can be stored and interpreted by widely spread visualization toolkits like the VTK based ParaView. ug4 is a cross-platform tool and supports Linux, MacOSX and Microsoft Windows.

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Latest Release

UG4 v23.6.0

June 10, 2023

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Getting started

• Setup UG4
• Tutorials
• Examples
• Documentation

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