Numerical modeling of turbulent flow in a composite porous/fluid duct utilizing a two-layer k–ε model to account for interface roughness

✍ Scribed by A.V. Kuznetsov

• Publisher: Elsevier Science
• Year: 2004
• Tongue: French
• Weight: 232 KB
• Volume: 43
• Category: Article
• ISSN: 1290-0729
• DOI: 10.1016/j.ijthermalsci.2004.02.011

✦ Synopsis

This paper is aimed at investigating the effect of roughness of the porous/fluid interface on turbulent convection heat transfer in composite porous/fluid ducts. It is expected that in many cases the effect of interface roughness on convection may be more significant than the effect of possible flow turbulization in the porous region. The analysis of appropriate dimensionless parameters shows that in many practical situations even if the flow in the clear fluid region is turbulent, the flow in the porous region remains laminar. The problem is thus reduced to matching the turbulent flow solution in the clear fluid region with the laminar flow solution in the porous region at the rough interface. It is shown that roughness of the porous/fluid interface significantly impacts turbulent flow in the clear fluid region as well as overall heat transfer in the duct.