The Stability of Vertical Buoyancy-Induced Flow in Cold Water
| Autor: | Benjamin Gebhart, J. M. Higgins |
|---|---|
| Rok vydání: | 1983 |
| Předmět: |
Convection
Natural convection Materials science Buoyancy Mechanical Engineering Prandtl number Flow (psychology) Thermodynamics engineering.material Condensed Matter Physics Isothermal process Physics::Fluid Dynamics symbols.namesake Mechanics of Materials symbols engineering General Materials Science Boundary value problem Boussinesq approximation (water waves) Physics::Atmospheric and Oceanic Physics |
| Zdroj: | Journal of Heat Transfer. 105:767-773 |
| ISSN: | 1528-8943 0022-1481 |
| DOI: | 10.1115/1.3245660 |
| Popis: | Calculations of the stability of the buoyancy-induced flow of cold water, adjacent to a vertical surface, have been carried out. The disturbance equations, for an isothermal boundary condition, have been formulated with a new density relation for pure and saline water, of very high accuracy. Buoyancy terms in the base flow and disturbance equations, thereby, accurately express the buoyancy forces in water at low temperatures. Stability results are presented for a Prandtl number of 12.6 for a variety of ambient and surface temperature conditions. The anomalous cold water density behavior was found to produce important differences in stability from the Boussinesq solutions. The Boussinesq approximation consistently overpredicts the buoyancy force in upflow circumstances. The resulting neutral stability prediction lies upstream of the accurate ones. For temperature conditions which result in downflow, the predictions lie downstream of the accurate values. The effects may be very large. |
| Databáze: | OpenAIRE |
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