Scalable Interfaces for Geometry and Mesh based Applications (SIGMA) Capabilities: Geometry and Mesh (data) generation/handling infrastructure with flexible solver interfaces. CGM supports both open-source (OCC) and commercial (ACIS) geometry modeling engines. MOAB provides scalable mesh (data) usage in applications through efficient array-based access; Support parallel I/O, visualization. MeshKit provides unified meshing interfaces to advanced algorithms and to external packages (Cubit/Netgen). Interfaces for mesh-to-mesh coupling and discrete solvers: CouPE provides component based multi-physics solver capability utilizing underlying scalable mesh-to-meh solution transfers. PETSc – MOAB interface simplifies efficient discretization and solution of PDE on unstructured meshes with FEM. Download SIGMA 1.0 tools: http://sigma.mcs.anl.gov/downloads/ For support, email package-dev@mcs.anl.gov [package=cgm,moab,lasso,meshkit] Website: http://sigma.mcs.anl.gov

SIGMA: Application highlights Wide variety of DOE applications covering Climate, Nuclear Fusion & Fission, Mesh generation and Visualization. NEK5000: Spectral element CFD code Atmospheric Modeling with conservative remapping Fusion: radiative transport Coupled multi-physics nuclear reactor analysis

SIGMA: Research areas and collaboration Application and algorithm development in collaboration with several national laboratories and universities. Some active research areas: scalable meshing algorithms and parallel mesh infrastructure, mesh-to-mesh coupling and conservative solution transfer, field descriptions on mesh and flexible discretization schemes for PDEs, solver interactions and multiphysics/multiscale capabilities. SBIR (Kitware): Development of graphical front end and analysis tool http://www.kitware.com/CMB/project/cmbnuclear.html Based on Reactor Geometry Generator and MeshKit along with CGM+MOAB Kitware GUI: Visualize geometry, generate mesh & analyze