NON-DARCY FLOW AND AXIAL CONDUCTION EFFECTS ON FORCED-CONVECTION IN POROUS MATERIAL FILLED PIPES

The effects of non-Darcy extensions and axial conduction on forced con vective heat transfer in porous material filled pipes have been examin ed numerically employing successive accelerated replacement scheme. Th e non-Darcy extensions considered are classical convective terms, Forc hheimer non-linear inertial terms and Brinkman viscous terms. Numerica l results obtained indicate that inclusion of axial conduction leads t o significant increase in local as well as average Nusselt number in t he thermally developing region for Pe< 100. Among the aforementioned n on-Darcy extensions, inclusion of Brinkman viscous terms to Darcy flow model lead to qualitatively significant changes in the flow and heat transfer. Inclusion of classical convective and/or Forchheimer non-lin ear inertial terms to Brinkman extended Darcy flow model lead to a sli ght increase in local Nusselt number. When all the non-Darcy extension s are included, the local Nusselt numbers coinside with the local Nuss elt numbers obtained with Darcy-Forchheimer-Brinkman flow description.