20090514
A systematic framework for implicit LES modeling will be presented. Unlike previous approaches to ILES, where given nonlinearly stable discretizations are employed without a priori analysis of the effect of the truncation error, with the proposed framework ALDM (adaptive local deconvolution model) physically consistent modeling is introduced to ILES. With ILES numerical discretization and SGS modeling are fully merged and physical SGS modeling amounts to new and special requirements on the numerical discretization scheme. Basis of the way to solution is to devise a suitable nonlinear discretization environment with sufficient flexibility to allow for modeling. In the presentation we will describe this development, explain and analyse the special constraints for the numerical discretization and show that an implicit model can be derived in a straightforward way from turbulence theory which results in reliable predictions of a wide range of flows without further ad hoc modifications. Current work is on extending the approach for increasingly complex flows by immersed boundary techniques and wall modeling.
This talk is provided together with Study Center of Mechanics.
Category: CE SeminarTechnische Universität Darmstadt
Graduate School CE
Dolivostraße 15
D64293 Darmstadt

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