Use of Generalized Davidson Eigenvalue Solver for Coarse Mesh Finite Difference Acceleration
Conference
·
OSTI ID:1651422
- ORNL
This paper summarizes improvements in the coarse mesh finite difference (CMFD) performance by focusing on the eigenvalue solution methodology. The current solution technique uses a shifted power iteration with the PETSc solver package. A generalized Davidson methodology has been implemented into MPACT using the Trilinos solver package. The new generalized Davidson solver shows significant improvements in the overall runtime for the CMFD acceleration scheme and the overall MPACT performance. The performance improves between 5 and 27 times for the CMFD runtime. This results in a speedup of between 2.5 to 5 times on the overall solution time for MPACT.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1651422
- Country of Publication:
- United States
- Language:
- English
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