Experimental study of natural convection in fluid-superposed porous layers heated locally from below

Aniruddha Bagchi, Francis A. Kulacki

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

An experimental study of natural convection in fluid-superposed porous layers heated locally from below is reported. Measurements are made in a rectangular chamber with 3 mm DIA glass beads as the porous layer and distilled water as the saturating fluid. The effects of the heater-to-cavity length ratio and the porous layer-to-cavity height ratio on the overall heat transfer coefficients are reported. Average heat transfer coefficients over the heated surface increase with a decrease in porous layer-to-cavity height ratio, but no clear effect of heater-to-cavity length ratio is seen. Temperature profiles in the domain reveal a plume like flow with a single pair of circulating cells and evidence of convective motion inside the porous layer.

Original languageEnglish (US)
Pages (from-to)1149-1153
Number of pages5
JournalInternational Journal of Heat and Mass Transfer
Volume55
Issue number4
DOIs
StatePublished - Jan 31 2012

Keywords

  • Fluid-superposed porous layers
  • Natural convection
  • Porous media

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