Method for efficient prevention of gravity wave decoupling on rectangular semi-staggered grids

Slobodan Nickovic, Vladimir Djurdjevic, Mirjam Vujadinovic, Zavisa I. Janjic, Milan Curcic, Borivoj Rajkovic

Research output: Contribution to journalArticlepeer-review

Abstract

Generation of short gravity wave noise often occurs on semi-staggered rectangular grids as a result of sub-grid decoupling when there is a strong forcing in the mass field. In this study a numerical scheme has been proposed to prevent the generation of the gravity wave decoupling. The proposed numerical method provides efficient communication between decoupled gravity wave finite-difference solutions by a simple averaging of a term in the height tendency in the continuity equation. The proposed method is tested using a shallow water sink model developed for the purpose of this study. It has been demonstrated that this method outperforms other existing approaches. The new scheme is time efficient, based on explicit time integration and can be easily implemented. The proposed method is applicable in hydrodynamic models specified on semi-staggered B or E grids.

Original languageEnglish (US)
Pages (from-to)1865-1875
Number of pages11
JournalJournal of Computational Physics
Volume230
Issue number5
DOIs
StatePublished - Mar 1 2011

Keywords

  • Divergence correction
  • Gravity wave
  • Rectangular grid

ASJC Scopus subject areas

  • Numerical Analysis
  • Modeling and Simulation
  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)
  • Computer Science Applications
  • Computational Mathematics
  • Applied Mathematics

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