Benchmarking a new open-source 3D circulation model (ELCIRC)

Yinglong Zhang, Antonio Baptista

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Released recently as an open source code, ELCIRC (Eulerian-Lagrangian Circulation) solves the primitive shallow-water Navier-Stokes equations with turbulence closure submodels. Numerically it uses a semi-implicit finite-difference/volume method on unstructured horizontal grids and structured grids in the unstretched vertical direction. An Eulerian-Lagrangian method (ELM) is used to treat the advection, and wetting and drying is a natural part of the algorithm. The model has low-order accuracy, but is very flexible, computationally efficient, and robust. Overall, it has shown excellent ability to address complex river-to-ocean systems, and is currently used as the computational engine for our observation and forecasting system for the Columbia River estuary and plume. As a part of the development of ELCIRC, we carefully assessed its performance against a wide set of controlled benchmark problems: wave propagation on a slope, geostrophic flow in a straight channel, and adjustment under gravity, etc. In this paper we report on these benchmark studies, which provide very useful insights on the capabilities and limitations of the model. Using carefully defined error metrics, convergence studies are carried out. Compared against well-established higher-order models (in particular, ADCIRC and ROMS), ELCIRC has the capability of compensating for its low-order accuracy through inexpensive high resolution. Benchmarks will be made available electronically before the publication of the conference proceedings.

Original languageEnglish (US)
Pages (from-to)1791-1800
Number of pages10
JournalDevelopments in Water Science
Volume55
Issue numberPART 2
DOIs
StatePublished - 2004

Fingerprint

Eulerian analysis
benchmarking
Benchmarking
Rivers
geostrophic flow
conference proceeding
shallow-water equation
Navier-Stokes equations
Advection
Estuaries
river
wetting
Wave propagation
wave propagation
Navier Stokes equations
Wetting
engine
Drying
Gravitation
advection

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Oceanography
  • Ocean Engineering
  • Mechanical Engineering
  • Water Science and Technology

Cite this

Benchmarking a new open-source 3D circulation model (ELCIRC). / Zhang, Yinglong; Baptista, Antonio.

In: Developments in Water Science, Vol. 55, No. PART 2, 2004, p. 1791-1800.

Research output: Contribution to journalArticle

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