Investigation of multiscale subgrid models for LES of instabilities and turbulence in wake vortex systems
(2007) Symposium on COmplex Effects in Large Eddy Simulation (CY-LES 2005) — Location: Limassol, Cyprus (20.September.2005)
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- 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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Citations
Cocle, R., Dufresne, L., & Winckelmans, G. (2007). Investigation of multiscale subgrid models for LES of instabilities and turbulence in wake vortex systems. In Kassinos, Stavros (ed.); Langer, Carlos (ed.); Laccarno, Gianluca (ed.); Moin, Parviz (ed.) (ed.), Complex Effects in Large Eddy Simulations (pp. 141-159). https://doi.org/10.1007/978-3-540-34234-2_11