Sheared salt fingers: Instability in a truncated system

Francesco Paparella, Edward A. Spiegel

Research output: Contribution to journalArticle

Abstract

We derive a model for fingering doubly diffusive convection from a truncated expansion in horizontal planform functions with the inclusion of a large-scale shearing mode. This produces nonlinear partial differential equations in time and in vertical coordinate. At a high enough Rayleigh number, both convection and shear modes are sustained and their interaction produces rich cyclic dynamics with the fingering layer dividing into two distinct finger layers that engender steps in the mean salinity before being disrupted by the beginning of a new cycle.

Original languageEnglish (US)
Pages (from-to)1161-1168
Number of pages8
JournalPhysics of Fluids
Volume11
Issue number5
DOIs
StatePublished - Jan 1 1999

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convection
planforms
salts
Rayleigh number
salinity
shearing
partial differential equations
inclusions
shear
cycles
expansion
interactions

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Sheared salt fingers : Instability in a truncated system. / Paparella, Francesco; Spiegel, Edward A.

In: Physics of Fluids, Vol. 11, No. 5, 01.01.1999, p. 1161-1168.

Research output: Contribution to journalArticle

Paparella, Francesco ; Spiegel, Edward A. / Sheared salt fingers : Instability in a truncated system. In: Physics of Fluids. 1999 ; Vol. 11, No. 5. pp. 1161-1168.
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