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Large-eddy simulations of subharmonic transition in a supersonic boundary layer
2007 (English)In: AIAA Journal, ISSN 0001-1452, E-ISSN 1533-385X, Vol. 45, no 5, 1019-1027 p.Article in journal (Refereed) Published
Abstract [en]

We investigate the performance of two recently developed subgrid-scale models, the approximate deconvolution model and the high-pass filtered Smagorinsky model, in large-eddy simulations of laminar-turbulent transition in a supersonic boundary layer. Subharmonic transition in a boundary layer at a freestream Mach number of 4.5 and a Reynolds number (based on initial displacement thickness) of 10,000 is considered, which has been studied previously in detail by direct numerical simulations. For computational efficiency, the temporal simulation approach has been adopted. The discretization is based on Fourier collocation and various high-order finite difference schemes in the wall-parallel and wall-normal directions, respectively. Large-eddy simulations results are assessed by comparing statistical and instantaneous quantities during transition with data obtained from a sufficiently resolved simulations accurately reproduce the direct direct numerical simulation. The results show that the large-eddy numerical simulations data from the slightly disturbed laminar flow through transition into the turbulent stage, with a computational effort of two orders of magnitude less than the direct numerical simulations. Both subgrid-scale models are formulated locally in space and in a fully three-dimensional manner and do not need an ad hoc adaptation to nonturbulent or near-wall regions.

Place, publisher, year, edition, pages
2007. Vol. 45, no 5, 1019-1027 p.
Keyword [en]
approximate deconvolution model, subgrid-scale model, numerical-simulation, flat-plate, shear flows, turbulence, resolution, schemes, entropy
URN: urn:nbn:se:kth:diva-16604ISI: 000246195000007ScopusID: 2-s2.0-34249666158OAI: diva2:334646
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Schlatter, Philipp
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