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| Titel |
Statistics of fingering convection in 2D and 3D |
| VerfasserIn |
F. Paparella, J. von Hardenberg |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250030155
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| Zusammenfassung |
| The fingering instability is a flavour of doubly-diffusive instability that, close to marginality,
leads to the formation of tall and thin columns of convecting fluid. This phenomenon is
particularly interesting in oceanography, because in vast areas of the subtropical termocline
temperature and salinity are stratified in a finger-favourable way. While the linear instability
is rather well understood, the nonlinear dynamics far from marginality is not. In the fully
nonlinear regime the dominant patterns change from tall fingerlike structures to buoyant and
sinking blobs. In the literature this regime has been explored mostly by means of
two-dimensional numerical simulations, while three-dimensional studies have been less
frequent because of their high computational cost. We present a comparison of the statistics
of fully nonlinear fingering convection in 2D and 3D simulations, for Rayleigh numbers up to
1011. |
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