000014703 001__ 14703
000014703 005__ 20161115100159.0
000014703 04107 $$aeng
000014703 046__ $$k2016-08-21
000014703 100__ $$aLamballais, Eric
000014703 24500 $$aExplicit vs. implicit subgrid-scale modelling for les

000014703 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000014703 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000014703 506__ $$arestricted
000014703 520__ $$2eng$$aThis study compares explicit and implicit subgrid-scale modelling for large eddy simulation. The implicit modelling is based on a targeted numerical dissipation introduced by the discretization of the viscous term. The flexibility of the method ensures high-order accuracy while controlling the level and spectral features of the resulting numerical viscosity. A spectral closure can be used to scale it a priori. This relaxation strategy is found more efficient and accurate than the extremely popular Smagorinsky model in standard as well as in dynamic version. Its main advantage is the ability to regularise the solution at the mesh scale, a property that cannot be reached with any of the two versions of the Smagorinsky model that show a strong sensitivity to numerical errors. Despite its purely numerical nature, the present approach can also be viewed as explicit subgrid-scale modelling because of the equivalence with spectral viscosity prescribed on a physical basis.

000014703 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000014703 653__ $$a

000014703 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000014703 720__ $$aLamballais, Eric
000014703 8560_ $$ffischerc@itam.cas.cz
000014703 8564_ $$s171590$$uhttps://invenio.itam.cas.cz/record/14703/files/TS.FM13-1.02.pdf$$yOriginal version of the author's contribution as presented on CD,  page 1332, code TS.FM13-1.02
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000014703 962__ $$r13812
000014703 980__ $$aPAPER