Mixed-Precision Spectral Deferred Correction: Preprint

Conference · Wed Sep 02 00:00:00 EDT 2015

OSTI ID:1225349

Grout, Ray W. S.

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: National Renewable Energy Lab. (NREL), Golden, CO (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC36-08GO28308
• OSTI ID: 1225349
• Report Number(s): NREL/CP-2C00-64959
• Resource Relation: Conference: 27th International Conference on Parallel Computational Fluid Dynamics;Montreal, Canada;05/17/2015 - 05/02/2015
• Country of Publication: United States
• Language: English

Related Subjects

97 MATHEMATICS AND COMPUTING
Spectral deferred correction
mixed precision
combustion
CFD