Extending PETSC's Composable, Hierarchical, Nested Solvers

DMNetwork:composable multiphysics PDE-based network simulations: robust, scalable simulation framework for large-scale network applications, such as power-grid and water networks; SITAR:solver-integrated tree-based adaptive refinement: high-efficiency meta-multigrid solvers with adaptivity, as motivated by modeling in fusion, geodynamics, and nuclear reactors; and Outer-loop computations:integrated solver and data management capabilities needed for work toward predictive science, including construction of auxiliary heterogeneous subsystems, as needed by numerical optimization and synthesis of data-intensive and simulation-intensive components These scalable solvers will benefit numerous applications and thus will have a powerful impact on a broad range of important Office of Science and other DOE work.