a long term geodynamics simulation platform
Underworld is a 3D-parallel geodynamic modelling framework capable of deriving viscous / viscoplastic thermal, chemical and thermochemical models consistent with tectonic processes, such as mantle convection and lithospheric deformation over long time scales.
Underworld utilises a Lagrangian particle-in-cell finite element scheme (the prototype of which is the Ellipsis code), and is visualised using gLucifer.
The Underworld source code is written in C in an Object Oriented style, following the methodology of design for change applied to computational codes implemented in StGermain. It uses PETSc (optimised numerical solvers) and MPI (parallelism) libraries. The Underworld to StGermain software stack is released under a mixture of BSD and LGPL licenses.
The Underworld Modelling Capabilities details the core set of phenonema modelled and distributed with Underworld, including lithospheric deformation, slab subduction and mantle convection. Underworld can be obtained from Underworld Downloads, and user and developer documentation from Underworld Documentation.