This project will provide a multi-physics, parallel framework application, FACETS, which will enable whole-device modeling for the U.S. fusion program, and provide the modeling infrastructure needed for ITER, the next step fusion confinement device. FACETS will be highly flexible, through use of modern computational methods, including component technology and object oriented design, to facilitate switching from one model to another for a given aspect of the physics. This will enable use of simplified models for rapid turnaround of high-fidelity models that will take advantage of the largest supercomputer hardware. FACETS will do so in a heterogeneous parallel context, where different parts of the application will take advantage through parallelism based on task farming, domain decomposition, and/or pipelining as needed and applicable. An integral part of the FACETS development will be the coupling of existing core and edge simulations, with the transport and wall interactions described by reduced models. Adding more detailed wall interactions will follow. In the out years, FACETS will bring greater coupling complexity, including the addition of near-first-principles computations of turbulent transport in the core and the edge. This development plan was created to provide early delivery of capability, with continual delivery of new capability through out the project.
The Department of Energy's mission is to advance the national, economic and energy security of the United States. Fusion Energy has been identified as having the potential to play a key role in meeting the nation’s future energy needs. This is a complex, international endeavor, with the next magnetic-fusion plasma confinement device, ITER, costing of order $10 billion. Prior to the construction of any such large device, there is a need to understand performance as it relates to device parameters in order to arrive at an optimum device for demonstrating the next step on the road to fusion energy. As performance is related to the rate at which heat and particles are lost to the wall, one would like, therefore, to be able to compute the transport, the rate at which heat and particles are lost to the wall, from first principles, for any of the various configurations contemplated for ITER and, ultimately, a fusion power plant. In addition, FACETS will allow optimization of ITER operation and ITER-developed physics understanding through comparative ease of computational diagnostics.
Science Application: Fusion Science
Project Title: Framework Application for Core-Edge Transport Simulations (FACETS).
Principal Investigator: J.R. Cary
Project Webpage: https://facets.txcorp/facets
Participating Institutions and Co-Investigators:
Budget and Duration: Approximately $2.2 million per year for five years (Science Application Partnership is three years) 1
1Subject to acceptable progress review and the availability of appropriated funds