Influence of the geometric parameter on the regimes of natural convection and thermal surface radiation in a closed parallelepiped

S. G. Martyushev, I. V. Miroshnichenko, M. A. Sheremet

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We have performed a numerical analysis of the stationary regimes of thermogravitational convection and thermal surface radiation in a closed differentially heated parallelepiped. The mathematical model formulated in dimensionless natural velocity-pressure-temperature variables was realized numerically in the control volume approach. Analysis of the radiative heat exchange was carried out on the basis of the surface radiation approach with the use of the balance method in the Polyak variant. We have obtained three-dimensional temperature and velocity fields, as well as dependences for the mean Nusselt number reflecting the influence of the geometric parameter, the Rayleigh number, and the reduced emissive factor of the walls on the flow structure and the heat transfer.

Original languageEnglish
Pages (from-to)1522-1529
Number of pages8
JournalJournal of Engineering Physics and Thermophysics
Issue number6
Publication statusPublished - 1 Jan 2015



  • Control volume approach
  • Diathermal medium
  • Natural convection
  • Parallelepiped
  • Thermal surface radiation

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Engineering(all)

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