Abstract
This paper investigates the capabilities of different subgrid scale (SGS) models, including the recent “multiscale” models, for large-eddy simulation (LES), here in a vortex-in-cell (VIC) method, of complex wake vortex dynamics. More specifically, we here consider the multiscale dynamics developing in a counterrotating four-vortex system, that evolves from a simple state to a turbulent state. The various SGS models are tested and compared on this complex and transitional flow. Comparisons are also made with results obtained using a pseudo-spectral method. Energy diagnostics (global and modal) and spectra are provided and used to support the comparisons. A discussion on the applicability of the various models to LES of complex wake vortex flows is made. The multiscale models are seen to be the most appropriate.
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Cocle, R., Dufresne, L., Winckelmans, G. (2007). Investigation of Multiscale Subgrid Models for LES of Instabilities and Turbulence in Wake Vortex Systems. In: Kassinos, S.C., Langer, C.A., Iaccarino, G., Moin, P. (eds) Complex Effects in Large Eddy Simulations. Lecture Notes in Computational Science and Engineering, vol 56. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-34234-2_11
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DOI: https://doi.org/10.1007/978-3-540-34234-2_11
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