Mathematical simulation of conjugate turbulent natural convection in an enclosure with local heat source

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Abstract

A numerical analysis of turbulent regimes of the natural convection in a closed rectangular region with heat-conducting walls of finite thickness was carried out in the presence of a locally concentrated heat source under the conditions of the radiative-convective heat exchange with the ambient medium on one of the external boundaries. The mathematical model was constructed on the basis of the Reynolds equations in dimensionless variables stream function - vorticity vector - temperature. Special attention was paid to the investigation of the influence of the Grashof number er 108≤Gr<1010, of the unsteadiness factor 0< τ <1000, and the thermal conductivity ratio λ2,1 = 5.7·10-4, 6.8·10-5 on both the local and integral characteristics of the problem.

Original languageEnglish
Pages (from-to)107-121
Number of pages15
JournalThermophysics and Aeromechanics
Volume18
Issue number1
DOIs
Publication statusPublished - 1 Mar 2011

Keywords

  • conjugate heat transfer
  • local heat source
  • natural convection
  • numerical modelling
  • rectangular region
  • turbulence

ASJC Scopus subject areas

  • Radiation
  • Nuclear and High Energy Physics

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