A numerical and experimental study is reported for the case of buoyancy-driven convection in saturated horizontal packed beds. The Darcy model is extended by the Forchheimer (inertial) term and the effective thermal conductivity of the medium is represented by the sum of a stagnant and a (hydrodynamic) dispersive component, the latter being proportional to the local velocity amplitude. Although both effects are important, the dispersive effect dominates. The ratio of layer thickness to bead diameter is a significant parameter that can help to explain the observed Nusselt number data divergence in shallow porous layers.
|Original language||English (US)|
|Number of pages||8|
|Journal||American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD|
|State||Published - Dec 1 1987|
ASJC Scopus subject areas
- Mechanical Engineering
- Fluid Flow and Transfer Processes