ISSN Online: 2377-424X
ISBN Print: 0-89116-299-2
International Heat Transfer Conference 7
Structure of Multicellular Natural Convection in a Tall Vertical Annulus
要約
The structure of multicellular convection in a tall vertical annulus has been calculated by numerical methods. The predicted flow patterns consist of cells which drift upward at the speed which is in agreement with results from the linear theory of hydrodynamic stability, as well as with laboratory measurements. The shape and size of the cells are also in accordance with experimental observations. Some calculations are given for a hypothetical fluid with a Prandtl number zero. The results for air show how the flow structure depends on the ratio of the inner to outer radius of the cavity and how the flow behaves as a function of the aspect ratio. Average Nusselt numbers for representative cases are given. The study complements the available results for low aspect ratio cavities in which multicellular flows do not develop.