Abstract
We review three important issues in LES which need to be addressed in order to systematically advance LES towards flows of realistic complexity. First, we consider rigorous modeling consequences arising from the analytic – and algebraic structure of the LES modeling problem. In this context, we develop a new generalized similarity model and apply this to a spatially developing mixing layer. Second, we estimate the commutation error arising in LES for flows in complex geometries which involvenon-uniform filter-widths, and propose direct similarity modeling of these contributions. Third, we consider the numerical contamination of a ‘Smagorinsky fluid’ in order to illustrate the role of spatial discretization errors in LES. Suitable ratios between filter-width Δ and grid-spacing h are identified. Some guidelines for developing LES are proposed.
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Geurts, B.J. (2002). How Can We Make LES to Fulfill Its Promise?. In: Friedrich, R., Rodi, W. (eds) Advances in LES of Complex Flows. Fluid Mechanics and Its Applications, vol 65. Springer, Dordrecht. https://doi.org/10.1007/0-306-48383-1_2
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DOI: https://doi.org/10.1007/0-306-48383-1_2
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-0486-5
Online ISBN: 978-0-306-48383-7
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