Thermal Non-equilibrium Natural Convection in a Square Enclosure with Heat-Generating Porous Layer on Inner Walls

Baytaş A. F., BAYTAŞ A. C.

Transport in Porous Media, vol.120, no.1, pp.167-182, 2017 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 120 Issue: 1
  • Publication Date: 2017
  • Doi Number: 10.1007/s11242-017-0914-0
  • Journal Name: Transport in Porous Media
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.167-182
  • Keywords: Heat-generating porous layer, Natural convection, Non-Darcy flow model, Porous square enclosure, Thermal non-equilibrium model
  • Istanbul Gelisim University Affiliated: Yes

Abstract

Differentially heated enclosure with heat-generating porous layer on inner walls is studied computationally for non-Darcy flow and thermal non-equilibrium models. In this study, this problem is investigated for different internal and external Rayleigh numbers, Darcy numbers, porosity-scaled thermal conductivity ratio, solid-/fluid-scaled heat transfer coefficient and dimensionless thickness of the porous layer. The results indicate that the dimensionless thickness of the porous layer has an important effect on the heat transfer in the enclosure. It was found that the thermal non-equilibrium model is needed for small values of the porosity-scaled thermal conductivity ratio and the solid-/fluid-scaled heat transfer coefficient. It is shown that the convection of heat due to internal heat generation is increased in the enclosure when the ratio of internal Rayleigh number to external Rayleigh number is larger.