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The combined Lagrangian advection method

Dritschel, David and Fontane, Jérôme The combined Lagrangian advection method. (2010) Journal of Computational Physics, 229 (14). 5408-5417. ISSN 0021-9991

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Official URL: http://dx.doi.org/10.1016/j.jcp.2010.03.048

Abstract

We present and test a new hybrid numerical method for simulating layerwise-two-dimensional geophysical flows. The method radically extends the original Contour-Advective Semi-Lagrangian (CASL) algorithm by combining three computational elements for the advection of general tracers (e.g. potential vorticity, water vapor, etc.): (1) a pseudospectral method for large scales, (2) Lagrangian contours for intermediate to small scales, and (3) Lagrangian particles for the representation of general forcing and dissipation. The pseudo-spectral method is both efficient and highly accurate at large scales, while contour advection is efficient and accurate at small scales, allowing one to simulate extremely finescale structure well below the basic grid scale used to represent the velocity field. The particles allow one to efficiently incorporate general forcing and dissipation.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Journal of Computational Physics website: http://www.sciencedirect.com/science/journal/00219991
HAL Id:hal-00786319
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > University of St Andrews (UNITED KINGDOM)
Laboratory name:
Funders:
European Community, Marie Curie Fellowship
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Deposited By: Jérôme Fontane
Deposited On:08 Feb 2013 12:24

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