Abstract
A numerical study of mixed convection in a parallel-plate vertical channel filled with a fluid-saturated porous medium is performed using the Brinkman-Forchheimer-extended Darcy model. Detailed results of the evolution of mixed convection in the entrance region are reported for both the Darcian and the non-Darcian regimes, and for wide ranges of Darcy number, Reynolds number, and modified Grashof number based on permeability. The results indicate that as the Darcy number is decreased, while maintaining the modified Grashof number constant, there is a significant enhancement in heat transfer in the entry region. Due to inertia effects only, heat transfer decreases in the entrance region but increases in the fully developed region. In the Darcian regime, at high values of Re, the describing parameter is the Gr*/Re ratio, but at moderately low Re, axial conduction effects can be significant. The effects of the describing parameters on the hydrodynamic and thermal entry lengths are also reported.
| Original language | English |
|---|---|
| Pages (from-to) | 145-153 |
| Number of pages | 9 |
| Journal | American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD |
| Volume | 105 |
| State | Published - 1988 |
| Event | Symbolic Computation in Fluid Mechanics and Heat Transfer - Chicago, IL, USA Duration: 27 Nov 1988 → 2 Dec 1988 |