Large-scale space definition for the DG-VMS method based on energy transfer analyses
Résumé
A-priori analyses to study the effect of the large-scale space definition in the variational multiscale simulation (VMS) approach to LES are carried out in the context of a modal discontinuous Galerkin (DG) method. A numerically consistent framework is introduced to derive the expression of the ideal subgrid-scale (SGS) energy transfer, which takes into account the different terms involved in the DG discretization. Based on the insight gained from this study, a locally adaptive modeling strategy able to adjust the definition of the large-scale space to the local resolution requirements of the flow is proposed.
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