Natural convection in porous media with anisotropic dispersive thermal conductivity

J. G. Georgiadis

Research output: Contribution to journalConference articlepeer-review


In the case of flow through fully-saturated coarse porous media, the classical Darcy model is extended by the Forchheimer (inertial) term and the effective thermal conductivity of the medium has a stagnant and a dispersive (hydrodynamic) contribution, the latter depending linearly on the local filtration velocity. Measurements of the effective conductivity in fully-saturated packed beds have shown that the transverse component of effective conductivity is always smaller than the longitudinal component. A numerical investigation of two-dimensional steady natural convection in differentially heated rectangular enclosures filled with porous media is undertaken. It is shown that the heat transfer can be enhanced when the dispersive terms are included in the formulation. If the porous medium Prandtl number is of order 10-1 or larger, the effect of dispersion on the net heat transfer through the cavity is weaker in the case of the anisotropic model than the isotropic model.

Original languageEnglish (US)
Pages (from-to)77-83
Number of pages7
JournalAmerican Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
StatePublished - 1988
EventNatural Convection in Enclosures - 1988 - Chicago, IL, USA
Duration: Nov 27 1988Dec 2 1988

ASJC Scopus subject areas

  • Mechanical Engineering
  • Fluid Flow and Transfer Processes


Dive into the research topics of 'Natural convection in porous media with anisotropic dispersive thermal conductivity'. Together they form a unique fingerprint.

Cite this