• Open Access

Non-hydrostatic atmospheric cut cell model on a block-structured mesh

Authors

  • Hiroe Yamazaki,

    Corresponding author
    1. Division of Earth and Planetary Sciences, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
    • Division of Earth and Planetary Sciences, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwake, Sakyo, Kyoto 606-8502, Japan.
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  • Takehiko Satomura

    1. Division of Earth and Planetary Sciences, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
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Abstract

A block-structured Cartesian mesh approach based on the Building-Cube Method is implemented into a 2D non-hydrostatic atmospheric cut cell model to obtain high near-ground resolution using Cartesian coordinates. A simple flux-matching algorithm is introduced that ensures mass conservation across varying grid resolutions in a subcycling time integration. Results of simple diffusion and advection problems show that the method produces sufficiently accurate results with high computational efficiency. The developed model successfully reproduces a flow over a semicircular mountain on a locally refined mesh around the mountain. The result agrees well with that using a uniformly fine mesh. Copyright © 2011 Royal Meteorological Society

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