Abstract
A new class of Sub-Grid-Scale (SGS) formulations is presented. This class of SGS formulations enables one to derive closed forms of the SGS terms, in contrast to other methods that model these terms. The main difficulty with the exact SGS formulation is the additional data required on the boundaries. A particular form of the SGS terms, belonging to the class, has been implemented for simulating different transitional and turbulent flows. Here, we present some results for wall-free jet flows. For this type of flows, one avoids the difficulties at the boundaries, and therefore may study directly the effects of the SGS formulation. Simulated results have been compared with experimental data and simulations using dynamic SGS model. The new SGS formulation seems to reproduce very well the experimental data.
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References
Crow, S.C. and Champagne, F. H., (1971) Orderly structure in jet turbulence. J. Fluid Mech. 48, 547
Fuchs, L. (1986) A local mesh refinement technique for incompressible flows. Computers and Fluids, 14 69
Germano, M. (1986) Differential filters for the large eddy numerical simulation of turbulent flows. Phys. Fluids. 29, 1755
Olsson, M. and Fuchs, L. (1996) Large Eddy Simulation of the proximal region of a spatially developing circular jet. Submitted for publication.
Sami, S. and Carmody, T. and Rouse, H. (1967) Jet diffusion in the region of flow establishment. J. Fluid Mech. 27, 231
Verman, B., Geurts, B. and Kuerten, H. (1994) Realizability conditions for the turbulent stress in LES. J. Fluid Mech. 278, 35
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© 1996 Kluwer Academic Publishers
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Fuchs, L. (1996). An Exact SGS-Model for Les. In: Gavrilakis, S., Machiels, L., Monkewitz, P.A. (eds) Advances in Turbulence VI. Fluid Mechanics and its Applications, vol 36. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0297-8_6
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DOI: https://doi.org/10.1007/978-94-009-0297-8_6
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-6618-1
Online ISBN: 978-94-009-0297-8
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