The effect of perfectly conducting side walls on natural convection in porous media

Peter Vadasz, Carol Braester, Jacob Bear

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

An investigation of natural convection in a porous medium heated from below or above, and bounded by perfectly conducting side walls, shows that a motionless solution is impossible, except for a particular side wall temperature variation. Hence, convection occurs regardless of the value of Rayleigh number and regardless of whether the fluid is heated from below or from above. Numerical solutions for identical uniform temperatures imposed on both side walls (no temperature difference between the side walls) show that when heating from below, a subcritical flow results mainly near the side walls, which amplifies and extends over the entire domain under supercritical conditions.

Original languageEnglish (US)
Pages (from-to)1159-1170
Number of pages12
JournalInternational Journal of Heat and Mass Transfer
Volume36
Issue number5
DOIs
StatePublished - 1993
Externally publishedYes

Fingerprint

Natural convection
free convection
Porous materials
conduction
wall temperature
Temperature
subcritical flow
Heating
Rayleigh number
Fluids
temperature gradients
convection
heating
fluids
temperature

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Energy(all)
  • Mechanical Engineering

Cite this

The effect of perfectly conducting side walls on natural convection in porous media. / Vadasz, Peter; Braester, Carol; Bear, Jacob.

In: International Journal of Heat and Mass Transfer, Vol. 36, No. 5, 1993, p. 1159-1170.

Research output: Contribution to journalArticle

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