Investigation of high-order methods in large-eddy simulation of separated flow in a channel with periodic constrictions - Archive ouverte HAL Accéder directement au contenu
Chapitre D'ouvrage Année : 2018

Investigation of high-order methods in large-eddy simulation of separated flow in a channel with periodic constrictions

Résumé

In large-eddy simulations (LES), only the dynamics of large scales is computed and the effect of smaller scales is modelled. Scale separation is however difficult to establish since the low-pass filtering arises from a complex combination of implicit filtering by the grid and the discretization schemes. Evenwhen explicit filtering is performed, the implicit filtering due to the application of discretizationmethods changes the shape of the filter function. The principal objective of the current study is to identify the sensitivity of the predictive accuracy to resolution and modelling issues. Simulations were performed for six different finite-difference schemes, six explicit filters and five subgrid-scalemodels on a coarse grid. It is shown in particular that the dissipative part of the discretization scheme plays a determinant role and overwhelms the choice of a SGS closure.
Fichier principal
Vignette du fichier
DYNFLUID_DLES_2018_GLOERFELT.pdf (209.82 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-02877101 , version 1 (22-06-2020)

Identifiants

Citer

Xavier Gloerfelt, Paola Cinnella. Investigation of high-order methods in large-eddy simulation of separated flow in a channel with periodic constrictions. Direct and Large Eddy Simulation X, 24, Springer, pp.441-448, 2018, 978-3-319-63212-4. ⟨10.1007/978-3-319-63212-4_56⟩. ⟨hal-02877101⟩
13 Consultations
132 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More