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Title: Mixed-Precision Spectral Deferred Correction: Preprint

Convergence of spectral deferred correction (SDC), where low-order time integration methods are used to construct higher-order methods through iterative refinement, can be accelerated in terms of computational effort by using mixed-precision methods. Using ideas from multi-level SDC (in turn based on FAS multigrid ideas), some of the SDC correction sweeps can use function values computed in reduced precision without adversely impacting the accuracy of the final solution. This is particularly beneficial for the performance of combustion solvers such as S3D [6] which require double precision accuracy but are performance limited by the cost of data motion.
Authors:
Publication Date:
OSTI Identifier:
1225349
Report Number(s):
NREL/CP-2C00-64959
DOE Contract Number:
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: 27th International Conference on Parallel Computational Fluid Dynamics;Montreal, Canada;05/17/2015 - 05/02/2015
Research Org:
NREL (National Renewable Energy Laboratory (NREL)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
97 MATHEMATICS AND COMPUTING Spectral deferred correction; mixed precision; combustion; CFD