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One carries out three-dimensional large-eddy simulations of natural convection in a horizontal annulus using Smagorinsky's dynamic subgrid model. The onset of transition to turbulence and turbulent regimes are analyzed. The characteristics of unstable flows and their influence on the heat-transfer process are studied. To cite this article: E.L.M. Padilla, A. Silveira-Neto, C. R. Mecanique 333 (2005).
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