October 2006
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Tri-Lab Test Suite Probes ASC Code Capability
LANL scientists achieved a new landmark with the first complete coverage of the Tri-Lab Verification Test Suite on 1-D, 2-D, and 3-D grids. The Tri-Lab Test Suite probes three aspects of an ASC code’s capability. The first inquiry examines the ability of the code to generate the correct answers to test problems with known solutions. The second probe scrutinizes the quality of those answers on uniform and nonuniform grids. The third probe quantitatively assesses how quickly the ASC code converges to the correct answer as the number of grid points is increased, and if that convergence rate is compatible with the expected theoretical maximum rate. Daily runs of the suite on a development code contribute to new releases of an ASC code being “born verified.” This work was part of the basis for two Defense Programs Awards of Excellence for the ASC Program in October 2006.
Setup and parameters for a radiation diffusion problem in the Tri-Lab Verification Test Suite. Plots show the error in the radiation temperature as the function of distance from the heat source. As the number of grid points increases (red plot, lowest number, to gray plot, highest number), the error linearly decreases.
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