000014627 001__ 14627
000014627 005__ 20161115100157.0
000014627 04107 $$aeng
000014627 046__ $$k2016-08-21
000014627 100__ $$aKhani, Sina
000014627 24500 $$aEvaluation of eddy- and non-eddy-viscosity subgrid scale models in stratified turbulence

000014627 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000014627 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000014627 506__ $$arestricted
000014627 520__ $$2eng$$aThis paper presents a detailed study on the performance of eddy- and non-eddy-viscosity subgrid scale (SGS) models using direct numerical simulations (DNS) of decaying stratified turbulence, when two types of test filters – the Gaussian and sharp spectral filters – are applied. It is shown that non-eddy-viscosity models yield very good results when a Gaussian filter is applied. On the other hand, the eddy-viscosity models show less dissipative results when the spectral filter is applied. Overall, this study provides a strong support for the choice of minimum grid spacing in eddy- and non-eddy-viscosity SGS parameterizations using theoretical scale analysis and DNS data.

000014627 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000014627 653__ $$a

000014627 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000014627 720__ $$aKhani, Sina
000014627 8560_ $$ffischerc@itam.cas.cz
000014627 8564_ $$s58059$$uhttps://invenio.itam.cas.cz/record/14627/files/TS.FM09-3.03.pdf$$yOriginal version of the author's contribution as presented on CD,  page 1113, code TS.FM09-3.03
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000014627 962__ $$r13812
000014627 980__ $$aPAPER