Simulations of double-diffusive convection in narrow containers

Reneta Dimitrova, Suhas Pol, Stephen Webb, Harindra J.S. Fernando

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

A numerical investigation was conducted on the evolution of double-diffusive layers in a narrow-aspect-ratio cylinder that contains a salt-stratified fluid and subjected to bottom and side-wall heating. The numerical results were compared with the data of a laboratory experimental study conducted in parallel. The simulations were carried out using the Fluent computational fluid dynamics code, with a modified shear-stress k-ω transport model to better account for buoyancy effects. The role of the turbulence model in numerical predictions was investigated by conducting laminar and turbulent flow simulations. Both the experimental and numerical results show formation of multiple mixed layers of fluid separated by diffusive interfaces. Comparisons of laboratory and numerical results show a very good agreement for the layer thicknesses and not such good agreement for the temperature and salinity structures. The reasons for disparities between the model and experimental results were identified.

Original languageEnglish
Pages (from-to)131-145
Number of pages15
JournalProceedings of the Institution of Civil Engineers: Engineering and Computational Mechanics
Volume165
Issue number2
DOIs
StatePublished - 2012

Keywords

  • Dynamics
  • Mathematical modelling
  • Thermal effects

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