Mixed-Precision Spectral Deferred Correction: Preprint
Conference
·
OSTI ID:1225349
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.
- Research Organization:
- NREL (National Renewable Energy Laboratory (NREL)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1225349
- Report Number(s):
- NREL/CP-2C00-64959
- Country of Publication:
- United States
- Language:
- English
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