Numerical analysis of thermogravitational turbulent convection in a closed rectangular region with radiation source of energy

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Abstract

The mathematical modeling of the conjugate heat transfer in a closed rectangular region has been carried out under the conditions of the radiation supply of energy. The temperature and stream function fields obtained by the modeling illustrate a substantially unsteady nature of the conjugate heat exchange process under study. An analysis of temperature distributions in typical cross sections of the solution domain has shown a considerable inhomogeneity of the temperature field. It is found that an increase in the Rayleigh number leads to substantial modifications of the temperature and stream function fields. The influence of the distribution of radiation fluxes over the internal interfaces on the temperature fields and the airflow character is shown. The influence of the turbulization on the heat transfer intensity near the interfaces between media has been estimated. Comparisons of the obtained numerical results with experimental data have shown their good agreement.

Original languageEnglish
Pages (from-to)393-401
Number of pages9
JournalThermophysics and Aeromechanics
Volume23
Issue number3
DOIs
Publication statusPublished - 1 May 2016

Keywords

  • Baldwin−Lomax model
  • conjugate heat transfer
  • gaseous infrared radiator
  • natural convection
  • numerical modeling
  • turbulence

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics

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