The stability of two interacting compositional plumes under the influence of inclined rotation
| Autor: | I. A. Eltayeb, T. B. A. Elbashir |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Physics
Length scale Buoyancy Computational Mechanics Grashof number Astronomy and Astrophysics Rotation matrix Mechanics engineering.material Rotation Plume Physics::Fluid Dynamics Geophysics Classical mechanics Geochemistry and Petrology Mechanics of Materials engineering Physics::Atmospheric and Oceanic Physics Dimensionless quantity Linear stability |
| Zdroj: | Geophysical & Astrophysical Fluid Dynamics. 108:437-462 |
| ISSN: | 1029-0419 0309-1929 |
| DOI: | 10.1080/03091929.2013.879579 |
| Popis: | The linear stability of two interacting compositional plumes rotating uniformly about an axis inclined to the vertical is studied. The problem is governed by seven dimensionless parameters: The Grashoff number, , measuring the buoyancy force relative to the viscous force, the rotation parameter, , which measures the Coriolis force relative to the viscous force, the angle, , between the rotation vector and the vertical, the concentration strength , of the second plume relative to that of the first, the thicknesses, , of the two plumes and the distance, , between them (which have been made dimensionless using the salt-finger length scale). It is shown that rotation destabilises the neutral modes present in its absence. For a given set of the parameters (=), the growth rate increases with to a finite value as approaches infinity. The inclination of rotation to the horizontal is found to tend to stabilise a vertically rotating plume but succeeds only in reducing the magnitude of the growth rate while the orde... |
| Databáze: | OpenAIRE |
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