An unstructured-mesh atmospheric model for nonhydrostatic dynamics

JOURNAL OF COMPUTATIONAL PHYSICS

卷:254

Article

Smolarkiewicz, Piotr K.¹  Szmelter, Joanna²  Wyszogrodzki, Andrzej A.³ 

[1] European Ctr Medium Range Weather Forecasts, Reading RG2 9AX, Berks, England

[2] Univ Loughborough, Loughborough LE11 3TU, Leics, England

[3] Natl Ctr Atmospher Res, Boulder, CO 80307 USA

关键词: Unstructured mesh atmospheric models;    Nonoscillatory forward-in-time schemes;    Anelastic equations;    Orographic flows;    Planetary boundary layers;   

DOI  :  10.1016/j.jcp.2013.07.027

来源: Elsevier

【 摘 要 】

A three-dimensional semi-implicit edge-based unstructured-mesh model is developed that integrates nonhydrostatic anelastic equations, suitable for simulation of small-to-mesoscale atmospheric flows. The model builds on nonoscillatory forward-in-time MPDATA approach using finite-volume discretization and admitting unstructured meshes with arbitrarily shaped cells. The numerical advancements are evaluated with canonical simulations of convective planetary boundary layer and strongly (stably) stratified orographic flows, epitomizing diverse aspects of highly nonlinear nonhydrostatic dynamics. The unstructured-mesh solutions are compared to equivalent results generated with an established structured-grid model and observation. (C) 2013 Elsevier Inc. All rights reserved.

【 授权许可】

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