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ISSN Online: 2377-424X

International Heat Transfer Conference 12
August, 18-23, 2002, Grenoble, France

Some Complex Natural Convective Flows

Get access (open in a dialog) DOI: 10.1615/IHTC12.3270
14 pages

Sinopsis

Most traditional studies of natural convective flow have been concerned with relatively simple geometrical flow situations such as two-dimensional external flows over single bodies, two dimensional flows in channels and two-dimensional flows in rectangular enclosures. In addition to assuming two-dimensional flow, these traditional studies of natural convection also assume that there is no interaction between the convective motion and other modes of heat transfer, i.e. radiation or conduction, that the buoyancy forces result only from the temperature differences in the flow and that there is a linear relation between the density change and the temperature change, that the flow is steady and that no phase change takes place. However, in many situations of practical importance it is not possible to adopt these simplifying assumptions. A review of some of situations in which it is necessary to take account of effects ignored in classical studies is presented here. Some of the situations considered here are natural convective flows in which there is interaction between the convection and radiation or conduction, three-dimensional natural convection in apparently two-dimensional flow situations, natural convective flows in situations involving multiple bodies or enclosures, and natural convective flows that are unsteady despite the imposition of steady boundary conditions.