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    ARTICLE

    BIFURCATIONS OF NATURAL CONVECTION FLOWS FROM AN ENCLOSED CYLINDRICAL HEAT SOURCE

    Diego Angelia,*, Arturo Paganob, Mauro A. Corticellia, Alberto Ficherab, Giovanni S. Barozzia

    Frontiers in Heat and Mass Transfer, Vol.2, No.2, pp. 1-9, 2011, DOI:10.5098/hmt.v2.2.3003

    Abstract A numerical analysis of transitional natural convection from a confined thermal source is presented. The system considered is an air-filled, square-sectioned 2D enclosure containing a horizontal heated cylinder. The resulting flow is investigated with respect to the variation of the Rayleigh number, for three values of the aspect ratio A. The first bifurcation of the low-Ra fixed-point solution is tracked for each A-value. Chaotic flow features are detailed for the case A = 2.5. The supercritical behaviour of the system is investigated using nonlinear analysis tools and phase-space representations, and the effect of the flow More >

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