EFFECT OF THE INTERFACE ROUGHNESS ON TURBULENT CONVECTIVE HEAT TRANSFER IN A COMPOSITE POROUS/FLUID DUCT

摘要

The purpose of this paper is to investigate the effect of roughness of the porous/fluid interface on turbulent convective heat transfer in a composite duct whose central potion is occupied by a clear (of solid obstacles) fluid and whose peripheral part is occupied by a fluid-saturated porous medium. If particles or fibers that constitute the porous medium are relatively large, the roughness of porous/fluid interface cannot be neglected, even if the interface is machined as a relatively flat surface. The modeling is based on the assumption that although the flow in the clear fluid region is turbulent, the flow in the porous region remains laminar. Matching turbulent and laminar solutions at the porous/fluid interface for the case when the interface is rough is analyzed in detail.