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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/18284

Title: An unstructured-mesh atmospheric model for nonhydrostatic dynamics: towards optimal mesh resolution
Authors: Szmelter, Joanna
Zhang, Zhao
Smolarkiewicz, Piotr K.
Keywords: Unstructured mesh atmospheric models
Nonoscillatory forward-in-time schemes
Anelastic equations
Orographic flows
Critical layer
Issue Date: 2015
Publisher: © Elsevier Inc.
Citation: SZMELTER, J., ZHANG, Z. and SMOLARKIEWICZ, P.K., 2015. An unstructured-mesh atmospheric model for nonhydrostatic dynamics: towards optimal mesh resolution. Journal of Computational Physics, 294, pp. 363 - 381.
Abstract: The paper advances the limited-area anelastic model (Smolarkiewicz et al. (2013) [45]) for investigation of nonhydrostatic dynamics in mesoscale atmospheric flows. New developments include the extension to a tetrahedral-based median-dual option for unstructured meshes and a static mesh adaptivity technique using an error indicator based on inherent properties of the Multidimensional Positive Definite Advection Transport Algorithm (MPDATA). The model employs semi-implicit nonoscillatory forward-in-time integrators for soundproof PDEs, built on MPDATA and a robust non-symmetric Krylov-subspace elliptic solver. Finite-volume spatial discretisation adopts an edge-based data structure. Simulations of stratified orographic flows and the associated gravity-wave phenomena in media with uniform and variable dispersive properties verify the advancement and demonstrate the potential of heterogeneous anisotropic discretisation with large variation in spatial resolution for study of complex stratified flows that can be computationally unattainable with regular grids.
Description: This article was published in the Journal of Computational Physics [© Elsevier Inc.] and the definitive version is available at: http://dx.doi.org/10.1016/j.jcp.2015.03.054
Sponsor: The authors acknowledge support by the NERC/G004358 award and funding received from the European Research Council under the European Union’s Seventh Framework Programme (FP7/2012/ERC Grant agreement No.320375).
Version: Accepted for publication
DOI: 10.1016/j.jcp.2015.03.054
URI: https://dspace.lboro.ac.uk/2134/18284
Publisher Link: http://dx.doi.org/10.1016/j.jcp.2015.03.054
ISSN: 0021-9991
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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