NEMoSys: A Platform for Autonomous Mesh Refinement and Solution Verification

Significant amount of time and resources are spent generating and maintaining meshes for modeling and simulation by engineers and scientists in government, the academy, and the private sector. Beyond mesh generation, one major problem complex multiphysics software, such as those used in nuclear energy software, currently faces is the complex transfer of quantities between meshes during high-performance simulations. The proposed work seeks to produce a set of general-purpose methodologies for automated mesh generation, refinement, and solution verification that will be universally applicable to all kinds of multiphysics simulation, with specific relevance for nuclear engineering applications. An open-source, web-enabled, modular, extensible plat- form for mesh generation and solution transfer for complex reactor geometries is currently being built. In this proposed project, this software product will be extended to perform automated solution verification and adaptive mesh refinement. An existing mesh generation and solution transfer software will be extended to perform autonomous solution verification and adaptive refinement for multiphysics modeling and simulation applications. The software will be extended by the abstraction level and methods needed to evaluate errors, perform refinement and transfer physical quantities from the old mesh/grid to the refined one. The new functionality will be demonstrated and tested using examples relevant to complex multiphysics software. Currently, significant resources and approximately 80% of total analysis time is spent generating meshes/grids for multiphysics simulations. Engineers, scientists, and educators, especially those in the commercial sector or at small academic institutions, need an integrated, intuitive, and easy to use application that can reduce the burden of mesh generation. The proposed innovation delivers enhanced access to customized solutions to novice and expert users who rely on simulation in their research and development environments. The general purpose mesh generation, solution verification and adaptive refinement capabilities to be provided greatly facilitate users of multiphysics software.