The mixed convection plume along a vertical adiabatic surface embedded in a non-Darcian porous medium

✍ Scribed by Jiin-Yuh Jang; Chuan-Tzer Shiang

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 531 KB
• Volume: 40
• Category: Article
• ISSN: 0017-9310
• DOI: 10.1016/s0017-9310(96)00199-8

✦ Synopsis

Alastraet--The mixed convection flow, from a line heat source embedded at the leading edge of an adiabatic vertical surface which is immersed in a non-Darcian porous medium, is numerically studied by employing an implicit firtite difference Keller's box method. The non-Darcian effects of convective, inertia, and solid boundary are all considered. Both the buoyancy-assisting and buoyancy-opposing flow conditions have been investigated. The results are presented for the entire range of the mixed convection parameter AL = GrL/Rei[, a ratio of the buoyancy-force to the inertia-force, from the purely force convection (AL = 0) to the purely free convection (AL --* oo) regimes. It is shown that the non-Darcian effects decrease the peak velocities and increase the maximum temperatures. The criteria for the pure and mixed convection for a wall plume in porous media are established.