Mixed convection in a horizontal porous duct with a sudden expansion and local heating from below
- Univ. of Colorado, Boulder, CO (United States). Dept. of Mechanical Engineering
- Univ. of Minnesota, Minneapolis, MN (United States). Dept. of Mechanical Engineering
Results are reported for an experimental and numerical study of forced and mixed convective heat transfer in a liquid-saturated, horizontal porous duct. The cross section of the duct has a sudden expansion with a heated region on the lower surface downstream and adjacent to the expansion. Calculated and measured Nusselt numbers for 0.1 < Pe < 100 and 50 < Ra < 500 are in excellent agreement. Overall Nusselt numbers are correlated in terms of Nu/Pe{sup 1.5} and Ra/Pe{sup 1.5}. Calculated Nusselt numbers are very close to those for the bottom-heated flat duct, and this result has several important implications for convective heat and mass transfer in geophysical systems and porous matrix heat exchangers.
- OSTI ID:
- 418148
- Report Number(s):
- CONF-960815--; ISBN 0-7918-1513-7
- Country of Publication:
- United States
- Language:
- English
Similar Records
Mixed convection in horizontal porous layers heated from below
Mixed convection through vertical porous annuli locally heated from the inner cylinder