Jackie Hallberg

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A numerical model is being constructed to simulate the movement of water and constituents within a coupled groundwater and surface water system. The model is designed to run on all DoD HPC platforms. Local mesh refinement and coarsening and domain-decomposition preconditioners have been integrated into the model. The model has been exercised successfully on(More)
In this paper we discuss the design and implementation of a Newton-Krylov-Schwarz solver for the implicit temporal integration on an unstructured three-dimensional spatial mesh of Richards' equation for groundwater flow in unsaturated porous media. We use aggregation techniques from the algebraic multigrid literature to construct a coarse mesh for two-level(More)
A numerical model is being constructed to simulate the movement of water and constituents within a coupled groundwater and surface water system. The model is designed to run on all DoD HPC platforms. Local mesh refinement and coarsening and domain-decomposition preconditioners have been integrated into the model. The model has been exercised successfully on(More)
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