Numerical investigation of conjugate mixed convection in a rectangular cavity with heat-conducting walls of finite thickness under conditions of radiant energy supply

G. V. Kuznetsov, V. Yu Zyubanov, A. E. Nee

Research output: Contribution to journalArticle


A mathematical modeling of conjugate heat transfer in a semi-open rectangular cavity filled with air and semi-restricted by solid heat-conducting walls of finite thickness is performed under conditions of radiant energy supply in a mixed convection mode. According to the results of numerical modeling, differential (fields of temperature and stream function) and integral (average Nusselt numbers) characteristics of heat exchange have been obtained in a wide range of governing parameters (104 ≤ Ra ≤ 106, 300 ≤ Re ≤ 700). Based on the analysis of temperature and stream functions fields, it was established that the conjugate heat transfer process under study had a significantly unsteady nature. Scale influence of lifting force increasing on isolines of temperature and stream function formation in the air cavity is shown. It was found that an increase in the Rayleigh number leads to a rise in the average Nusselt number in a mixed convection mode.

Original languageEnglish
Pages (from-to)1459-1472
Number of pages14
JournalHeat Transfer Research
Issue number16
Publication statusPublished - 1 Jan 2017



  • Conduction
  • Conjugate heat transfer
  • Infrared radiation
  • Laminar flow
  • Mathematical modeling
  • Mixed convection

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Cite this