Mixed convection recirculation flow in a vertical single-rod channel connected to an upper plenum
| Autor: | Neil E. Todreas, Abdel-Raouf I. Barakat |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Meteorology Mechanical Engineering Flow (psychology) Mechanics Plenum space Volumetric flow rate Nuclear Energy and Engineering Heat flux Combined forced and natural convection General Materials Science Safety Risk Reliability and Quality Penetration depth Waste Management and Disposal Backflow Communication channel |
| Zdroj: | Nuclear Engineering and Design. 132:317-338 |
| ISSN: | 0029-5493 |
| Popis: | The buoyancy-induced channel backflow phenomenon in mixed convection flow has been studied in a vertical channel heated by a centrally-positioned heating rod and connected at the top of its length to a large plenum containing cool water. The bottom two thirds of the channel length is heated, while the top one third is an unheated section. Channel backflow represents a situation where, under specific heat flux and flow rate conditions, cool water from the upper plenum flows down and penetrates the channel. A semi-empirical model has been developed to provide insight into the backflow phenomenon. The unknown constants in this model have been established using experimental water data taken over a wide range of heat flux and flow rate combinations for three different channel diameters. The resulting correlations are for the onset of backflow and the backflow stream penetration depth. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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