Investigation of regimes of thermogravitational convection of a fluid between coaxial semicylinders with a heat-conducting shell in the presence of a local energy source

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Abstract

A numerical analysis has been made of the thermodynamic regimes of natural convection of a Newtonian fluid satisfying the Boussinesq approximation in the gap between coaxial semicylinders with finitely-thick walls in the presence of the heat-release source under the conditions of convective heat exchange with the environment. A mathematical model has been formulated in the dimensionless variables current function-velocity vorticity vector-temperature in polar coordinates. Streamlines and velocity and temperature fields reflecting the influence of the Prandtl number Pr = 0.7 and 7.0, the nonstationarity factor 0 < τ = 300, the dimensions of the energy source, and of the relative thermal conductivity on the flow regimes and heat transfer have been obtained.

Original languageEnglish
Pages (from-to)1379-1387
Number of pages9
JournalJournal of Engineering Physics and Thermophysics
Volume84
Issue number6
DOIs
Publication statusPublished - 1 Oct 2011

Keywords

  • Boussinesq approximation
  • Heat conduction
  • Horizontal semicylinder
  • Polar coordinates
  • Thermogravitational convection

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Engineering(all)

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