Summary
The method of Large-Eddy Simulation (LES) has provided a closer insight into the structures of turbulent flows at Reynolds numbers up to Re = 105. When applying LES to more complex flows of industrial relevance at higher Reynolds numbers the subgrid-scale modeling is of much larger importance than for lower Reynolds number configurations. This study aims to perform a critical analysis of the performance of subgrid-scale models at Reynolds numbers of up to Re = 106 for the complex flow around a NACA 4412 airfoil at 12 degrees angle of attack. It turns out that the most commonly used subgrid-scale models (i.e. Smagorinsky Model and Dynamic Models) display deficiencies in capturing the dominating near-wall motion which highly affects flows with separation. While these drawbacks only have a minor effect in flows at rather low Reynolds numbers, the observed model shortcomings lead to unsatisfactory results in high Reynolds number flows.
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© 2002 Springer-Verlag Berlin Heidelberg
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Schmidt, S., Thiele, F. (2002). Investigation of Subgrid-Scale Models in LES of Turbulent Flows with Separation. In: Wagner, S., Rist, U., Heinemann, HJ., Hilbig, R. (eds) New Results in Numerical and Experimental Fluid Mechanics III. Notes on Numerical Fluid Mechanics (NNFM), vol 77. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-45466-3_24
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DOI: https://doi.org/10.1007/978-3-540-45466-3_24
Publisher Name: Springer, Berlin, Heidelberg
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