Vortex intensification in convective cells
| Autor: | M. E. Povarnitsyn, M. F. Ivanov |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
Fluid Flow and Transfer Processes
Convection Physics Mechanical Engineering General Physics and Astronomy Mechanics Starting vortex Vortex shedding Rotation Vortex Physics::Fluid Dynamics Classical mechanics Circulation (fluid dynamics) Condensed Matter::Superconductivity Vortex stretching Horseshoe vortex Physics::Atmospheric and Oceanic Physics |
| Zdroj: | Fluid Dynamics. 39:729-734 |
| ISSN: | 1573-8507 0015-4628 |
| DOI: | 10.1007/s10697-005-0006-7 |
| Popis: | The intensification of single vortices in convective flows swirled by the Coriolis force is studied numerically. The initial disturbances, specified against the background of a steady cell, are coaxial with the cell flow and have various swirl directions, intensities, and dimensions. It is shown that the vortices are intensified no matter whether the direction of disturbing vortex rotation is co- or counter-directional with the Coriolis force. If the disturbance intensity is small as compared with that of the convective-cell flow, the growth of the azimuthal velocity circulation in the perturbing vortices depends linearly on their initial circulation. For such vortices, the energy increase is proportional to the characteristic vortex radius to the power −5/3. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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