Abstract
An experimental study of natural convection in fluid-superposed porous layers heated locally from below is reported. Measurements are made in a rectangular chamber with 3 mm DIA glass beads as the porous layer and distilled water as the saturating fluid. The effects of the heater-to-cavity length ratio and the porous layer-to-cavity height ratio on the overall heat transfer coefficients are reported. Average heat transfer coefficients over the heated surface increase with a decrease in porous layer-to-cavity height ratio, but no clear effect of heater-to-cavity length ratio is seen. Temperature profiles in the domain reveal a plume like flow with a single pair of circulating cells and evidence of convective motion inside the porous layer.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1149-1153 |
| Number of pages | 5 |
| Journal | International Journal of Heat and Mass Transfer |
| Volume | 55 |
| Issue number | 4 |
| DOIs | |
| State | Published - Jan 31 2012 |
Keywords
- Fluid-superposed porous layers
- Natural convection
- Porous media