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Large-scale turbulence modelling via α-regularisation for atmospheric simulations

Aizinger, V., Korn, P., Giorgetta, M. and Reich, S. (2015) Large-scale turbulence modelling via α-regularisation for atmospheric simulations. Journal of Turbulence, 16 (4). pp. 367-391. ISSN 1468-5248

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To link to this item DOI: 10.1080/14685248.2014.991443

Abstract/Summary

We study the possibility of obtaining a computational turbulence model by means of non-dissipative regularisation of the compressible atmospheric equations for climate-type applications. We use an α-regularisation (Lagrangian averaging) of the atmospheric equations. For the hydrostatic and compressible atmospheric equations discretised using a finite volume method on unstructured grids, deterministic and non-deterministic numerical experiments are conducted to compare the individual solutions and the statistics of the regularised equations to those of the original model. The impact of the regularisation parameter is investigated. Our results confirm the principal compatibility of α-regularisation with atmospheric dynamics and encourage further investigations within atmospheric model including complex physical parametrisations.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Science > School of Mathematical, Physical and Computational Sciences > Department of Mathematics and Statistics
ID Code:67457
Publisher:Taylor & Francis

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