A publication of the Advanced Simulation & Computing Division, NA-121.2, NNSA Defense Programs
June 2008
NA-ASC-500-08—Issue 7
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New Error Estimator Deployed in Encore
Numerical error estimation and adaptive mesh refinement are important capabilities for solution verification in modeling and simulation studies and for efficient use of computing resources. A new generic error estimator that can be used in multiple Sandia codes has been recently added to Encore—the SIERRA Mechanics toolkit for verification and adaptive mesh refinement. The estimator is based on averaging of fluxes or stresses and is independent of the physics used in the code.
This new capability is available in Encore Version 1.0 and is used by the thermal, fluids, and structural response modules in Sandia’s SIERRA Mechanics code.
Application of the new error estimator in Encore to a large rotation 3D structural torsion problem solved using the SIERRA Mechanics code Adagio. The mesh adaptivity is driven by the errors in the displacement gradients.
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