Multilevel Preconditioners for Reaction-Diffusion Problems with Discontinuous Coefficients
Journal Article
·
· Journal of Scientific Computing
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Penn State Univ., University Park, PA (United States)
- Idaho State Univ., Pocatello, ID (United States)
In this study, we extend some of the multilevel convergence results obtained by Xu and Zhu, to the case of second order linear reaction-diffusion equations. Specifically, we consider the multilevel preconditioners for solving the linear systems arising from the linear finite element approximation of the problem, where both diffusion and reaction coefficients are piecewise-constant functions. We discuss in detail the influence of both the discontinuous reaction and diffusion coefficients to the performance of the classical BPX and multigrid V-cycle preconditioner.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC52-07NA27344
- OSTI ID:
- 1440717
- Report Number(s):
- LLNL-JRNL--663816; 785179
- Journal Information:
- Journal of Scientific Computing, Journal Name: Journal of Scientific Computing Journal Issue: 1 Vol. 67; ISSN 0885-7474
- Publisher:
- SpringerCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Multilevel approximation of Gaussian random fields: Fast simulation
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