Assessment of Sub-Grid Scale Tensors in the context of Very Large Eddy Simulations

Evaluation de tenseurs sous maille pour la simulation des grandes échelles

Chandramouli, P. ; Heitz, D. ; Laizet, S. ; Mémin, E.

Type de document
Poster
Langue
Anglais
Affiliation de l'auteur
INRIA FLUMINANCE RENNES FRA ; IRSTEA RENNES UR OPAALE FRA ; IMPERIAL COLLEGE LONDON DEPARTMENT OF AERONAUTICS LONDON GBR ; INRIA FLUMINANCE RENNES FRA
Année
2016
Résumé / Abstract
Large Eddy Simulations (LES) are effectively used as an alternative to Direct Numerical Simulations (DNS). However, computationally even LES are quite expensive to perform for complex flows. This brings into the forefront the concept of Very Large Eddy Simulations (VLES) involving coarser meshes and hence cheaper computations. An associated limitation with VLES is the accuracy and stability of the sub-grid scale (SGS) model to be used. This is the focus of this poster wherein several SGS models have been compared for the simple case of channel flow at coarse resolution. The development of LES SGS models has been an area of scientific research for many decades starting with Smagorinsky [1]. Recent developments in this field have produced many modern SGS models which have been shown to work better than classical models [3][4]. In this study, the classical models namely, classic Smagorinsky as well as its dynamic version along with the WALE model, have been compared with the contemporary uncertainity based models developed by [2] and the implicit LES model developed by [3] in the context of VLES. The accuracy of the statistics have been analysed by comparison with the channel flow data of [4].
Congrès
Inaugural UK Fluids Conference, 07/09/2016 - 09/09/2016, London, GBR

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