Secondary motion in convection layers generated by lateral heating of a solute gradient

Cho Lik Chan, Wen Yau Chen, C. F. Chen

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

The three-dimensional motion observed by Chen & Chen (1997) in the convection cells generated by sideways heating of a solute gradient is further examined by experiments and linear stability analysis. In the experiments, we obtained visualizations and PIV measurements of the velocity of the fluid motion in the longitudinal plane perpendicular to the imposed temperature gradient. The flow consists of a horizontal row of counter-rotating vortices within each convection cell. The magnitude of this secondary motion is approximately one-half that of the primary convection cell. Results of a linear stability analysis of a parallel double-diffusive flow model of the actual flow show that the instability is in the salt-finger mode under the experimental conditions. The perturbation streamlines in the longitudinal plane at onset consist of a horizontal row of counter-rotating vortices similar to those observed in the experiments.

Original languageEnglish (US)
Pages (from-to)1-19
Number of pages19
JournalJournal of Fluid Mechanics
Volume455
DOIs
StatePublished - Mar 25 2002

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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