Conjugate natural convection in an open-ended porous square cavity

H. Saleh, Ishak Hashim

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Conjugate natural convection-conduction heat transfer in an open-ended porous square cavity with a finite wall thickness is studied numerically in the present article for a wide variety of thermal boundary conditions. The Forchheimer- Brinkman-extended Darcy model is used in the mathematical formulation for the porous layer, and the COMSOL is applied to solve the dimensionless governing equations. The governing parameters considered are the Rayleigh number (103 ≤ Ra ≤ 106), the porosity of the porous medium (0:4 ≤ ε ≤ 0:99), the wall-to-porous medium conductivity ratio (0:1 ≤ Kr ≤ 10:0), and the ratio of wall thickness to its width (0:02 ≤ D ≤ 0:4). The results are presented to show the effect of these parameters on the fluid flow and heat-transfer characteristics. The fluid in the bottom cavity was found stagnant at the relative low- and moderate-conductivity ratio for a case heating from above. It is also found that decreasing the thickness of the solid wall and/or increasing the porosity increases the flow circulation and the heat transfer for the various conductivity ratios and several thermal configurations.

Original languageEnglish
Pages (from-to)291-302
Number of pages12
JournalJournal of Porous Media
Volume16
Issue number4
DOIs
Publication statusPublished - 2013

Fingerprint

Natural Convection
Natural convection
free convection
Porous materials
Cavity
Porosity
Heat transfer
Conductivity
Heat Transfer
cavities
heat transfer
Heat conduction
conductivity
Porous Media
Flow of fluids
Boundary conditions
porosity
Heating
Fluids
Rayleigh number

Keywords

  • Conjugate heat transfer
  • Forchheimer-Brinkman model
  • Open cavity

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)
  • Condensed Matter Physics
  • Modelling and Simulation
  • Biomedical Engineering

Cite this

Conjugate natural convection in an open-ended porous square cavity. / Saleh, H.; Hashim, Ishak.

In: Journal of Porous Media, Vol. 16, No. 4, 2013, p. 291-302.

Research output: Contribution to journalArticle

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