Numerical analysis of spatial unsteady regimes of conjugate convective-radiative heat transfer in a closed volume with an energy source

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

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Unsteady regimes of convective-radiative heat transfer in a cubic enclosure with finitely thick heat-conducting walls in the presence of a constant-temperature energy source have been modeled mathematically under the conditions of convective heat exchange with the environment. A mathematical model has been formulated in dimensionless variables "vector potential-vorticity vector-temperature;" the model was realized numerically by the finite-difference method. An analysis of radiative heat transfer has been made on the basis of the surface-radiation approximation with the balance method in Polyak's version. Three-dimensional temperature and velocity fields and dependences for the average Nusselt number have been obtained; they reflect the influence of the reduced emissivity factor of interior surfaces of enclosing walls, of the relative thermal conductivity, of the unsteadiness factor on the flow regimes and heat transfer.

Original languageEnglish
Pages (from-to)124-134
Number of pages11
JournalJournal of Engineering Physics and Thermophysics
Volume87
Issue number1
DOIs
Publication statusPublished - 1 Jan 2014

Fingerprint

radiative heat transfer
convective heat transfer
energy sources
numerical analysis
Numerical analysis
Heat transfer
heat
Nusselt number
enclosure
Vorticity
Enclosures
emissivity
Finite difference method
vorticity
Temperature
Thermal conductivity
mathematical models
temperature distribution
thermal conductivity
velocity distribution

Keywords

  • closed volume
  • conjugate heat transfer
  • finite-difference method
  • surface radiation
  • vector potential

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Engineering(all)

Cite this

Numerical analysis of spatial unsteady regimes of conjugate convective-radiative heat transfer in a closed volume with an energy source. / Martyushev, S. G.; Miroshnichenko, I. V.; Sheremet, M. A.

In: Journal of Engineering Physics and Thermophysics, Vol. 87, No. 1, 01.01.2014, p. 124-134.

Research output: Contribution to journalArticle

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