Turbulent regime of thermogravitational convection in a closed cavity

Research output: Contribution to journalArticle

Abstract

We have performed a numerical analysis of the nonstationary turbulent natural convection in a closed region with heat-conducting walls of finite thickness and a heat source located at the cavity base under the conditions of convective-radiative heat exchange with the environment. Typical distributions of the thermohydrodynamic parameters (streamlines, temperature field, field of the kinetic energy of turbulence, and dissipation field of the kinetic energy of turbulence) in a fairly wide range of Grashof numbers 107 ≤ Gr ≤ 109 have been obtained. Results characterizing the scales of influence of the nonstationarity factor and the relative heat conductivity coefficient of the material of the surrounding walls on the heat transfer intensity are presented. A correlation for determining the average Nusselt number on the heat source surface has been established.

Original languageEnglish
Pages (from-to)346-357
Number of pages12
JournalJournal of Engineering Physics and Thermophysics
Volume83
Issue number2
DOIs
Publication statusPublished - 1 May 2010

Fingerprint

convection
heat sources
heat
cavities
kinetic energy
turbulence
Kinetic energy
Grashof number
Turbulence
Nusselt number
free convection
numerical analysis
temperature distribution
dissipation
heat transfer
Natural convection
Numerical analysis
conduction
Thermal conductivity
conductivity

Keywords

  • closed region
  • conjugate heat transfer
  • heat source
  • natural convection
  • turbulence

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Engineering(all)

Cite this

Turbulent regime of thermogravitational convection in a closed cavity. / Kuznetsov, G. V.; Sheremet, M. A.

In: Journal of Engineering Physics and Thermophysics, Vol. 83, No. 2, 01.05.2010, p. 346-357.

Research output: Contribution to journalArticle

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