Mathematical simulation of convective-radiative heat transfer in a ventilated rectangular cavity with consideration of internal mass transfer

M. A. Sheremet, N. I. Shishkin

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Mathematical simulation of the nonstationary regimes of heat-and-mass transfer in a ventilated rectangular cavity with heat-conducting walls of finite thickness in the presence of a heat-generating element of constant temperature has been carried out with account for the radiative heat transfer in the Rosseland approximation. As mechanisms of energy transfer in this cavity, the combined convection and the thermal radiation in the gas space of the cavity and the heat conduction in the elements of its fencing solid shell were considered. The mathematical model formulated in the dimensionless stream function-vorticity vector-temperature-concentration variables was realized numerically with the use of the finite-difference method. The streamline, temperature- field, and concentration distributions reflecting the influence of the Rayleigh number (Ra = 104, 105, 106), the nonstationarity (0 < τ ≤ 1000), and the optical thickness of the medium (τλ = 50, 100, 200) on the regimes of the gas flow and the heat-and-mass transfer in the cavity have been obtained.

Original languageEnglish
Pages (from-to)828-835
Number of pages8
JournalJournal of Engineering Physics and Thermophysics
Issue number4
Publication statusPublished - 1 Jul 2012



  • Combined convection
  • Heat-and-mass transfer
  • Numerical analysis
  • Radiation
  • Solid walls

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Engineering(all)

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