Parallel hydrodynamic finite element model with an N-Best refining partition scheme

Zhenchang Zhang, Huasheng Hong, Wing Hong Onyx Wai, Yuwu Jiang, Changle Zhou

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

We enhance a robust parallel finite element model for coasts and estuaries cases with the use of N-Best refinement algorithms, in multilevel partitioning scheme. Graph partitioning is an important step to construct the parallel model, in which computation speed is a big concern. The partitioning strategy includes the division of the research domain into several semi-equal-sized sub-domains, minimizing the sum weight of edges between different sub-domains. Multilevel schemes for graph partitioning are divided into three phases: coarsening, partitioning, and uncoarsening. In the uncoarsening phase, many refinement algorithms have been proposed previously, such as KL, Greedy, and Boundary refinements. In this study, we propose an N-Best refinement algorithm and show its advantages in our case study of Xiamen Bay. Compared with original partitioning algorithm in previous models, the N-Best algorithm can speed up the computation by 1.9 times, and the simulation results are in a good match with the in-situ data.
Original languageEnglish
Pages (from-to)1340-1349
Number of pages10
JournalChinese Journal of Oceanology and Limnology
Volume28
Issue number6
DOIs
Publication statusPublished - 1 Nov 2010

Keywords

  • domain decomposition
  • finite element method (FEM)
  • graph partitioning
  • N-Best
  • parallel computation

ASJC Scopus subject areas

  • Oceanography
  • Water Science and Technology

Cite this