.png){kind=icon}
返回
A communication-avoiding implicit-explicit method for a free-surface ocean model
.png){kind=icon}
OA
AI
DOI：10.1016/j.jcp.2015.11.008.png)
.png){kind=icon}
.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
We examine a nonlinear elimination method for the free-surface ocean equations based on barotropic-baroclinic decomposition. The two dimensional scalar continuity equation is treated implicitly with a preconditioned Jacobian-free Newton-Krylov method (JFNK). The remaining three dimensional equations are subcycled explicitly within the JFNK residual evaluation with a method known as nonlinear elimination. In this approach, the memory footprint of the underlying Krylov vector is greatly reduced over that required by fully coupled implicit methods. The method is second-order accurate and scales algorithmically, with allowed timesteps much larger than fully explicit methods. Moreover, the hierarchical nature of the algorithm lends itself readily to emerging architectures. In particular, we introduce a communication staging strategy for the three dimensional explicit system that greatly reduces the communication costs of the algorithm and provides a key advantage as communication costs continue to dominate relative to floating point costs in emerging architectures. (C) 2015 Elsevier Inc. All rights reserved.
Keyword:
Ocean modeling
IMEX method
Jacobian-free Newton-Krylov methods
Nonlinear elimination
Communication-avoiding algorithm
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
IF:
3.8
论文数:
1.5W
被引数:
7.4W
机构
引用论文
分享收藏Leveraging Anderson Acceleration for improved convergence of iterative solutions to transport systems利用Anderson加速改进运输系统迭代解的收敛性
PREAI
分享收藏Compactly integrated polarization insensitive 24-channel variable optical attenuator arrays using silica-based基于硅石的紧凑集成化、偏振不敏感的24通道可变光衰减器阵列
PREAI
分享收藏Methods for improving transient response of diesel engines – influences of different electrically assisted turbocharging topologies.png)
Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering
Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile EngineeringIF0
PREAI
分享收藏
查看更多内容