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ISSN Online: 2377-424X

ISBN Print: 0-89116-909-1

International Heat Transfer Conference 9
August, 19-24, 1990 , Jerusalem, Israel

RESULTS OF AN INTERACTIVE BOUNDARY-LAYER STABILITY-TRANSITION APPROACH TO MIXED CONVECTION

Get access (open in a dialog) DOI: 10.1615/IHTC9.2320
pages 363-368

Résumé

The imposed flow along a vertical flat plate, with a section cooled and followed by constant temperature, can separate due to the opposed forced and free convection. An interactive boundary-layer method has been used to examine this flow for length Reynolds numbers of 104 and 105 and Prandtl numbers of 0.1, 1.0 and 10. A stability-transition approach predicts the onset of transition and laminar-flow results are compared with those which involve laminar flow and transition to turbulent flow. It is shown that the numerical method is appropriate for the solution of the problem, and that transition occurs within the separation bubble or downstream of reattachment, depending on the Reynolds and Richardson numbers. The calculations of laminar flows are limited, probably because they cannot exist for all distances and Reynolds numbers, the effect of transition is considerable and the lower Reynolds number leads to larger regions of separated flow.