Adaptive Implicit Non-Equilibrium Radiation Diffusion

Conference · Tue Jan 01 00:00:00 EST 2013

OSTI ID:1095145

Philip, Bobby ^[1]; Wang, Zhen ^[1]; Berrill, Mark A ^[1]; Rodriguez Rodriguez, Manuel ^[1]; Pernice, Michael ^[2]

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1. ORNL
2. Idaho National Laboratory (INL)

We describe methods for accurate and efficient long term time integra- tion of non-equilibrium radiation diffusion systems: implicit time integration for effi- cient long term time integration of stiff multiphysics systems, local control theory based step size control to minimize the required global number of time steps while control- ling accuracy, dynamic 3D adaptive mesh refinement (AMR) to minimize memory and computational costs, Jacobian Free Newton-Krylov methods on AMR grids for efficient nonlinear solution, and optimal multilevel preconditioner components that provide level independent solver convergence.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1095145
• Resource Relation: Conference: ASTRONUM-2012 - the 7th Annual International Conference on Numerical Modeling of Space Plasma Flows, Kona-Kailua, Big Island, HI, USA, 20120625, 20120629
• Country of Publication: United States
• Language: English