Experimental verification of Darcy-Brinkman-Forchheimer flow model for natural convection in porous media

Journal Article · Sun Dec 01 04:00:00 EST 1991 · Journal of Thermophysics and Heat Transfer; (United States)

DOI:https://doi.org/10.2514/3.301· OSTI ID:6042259

Kladias, N; Prasad, V ^[1]

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1. Columbia University, New York (USA)

Experimental results for natural convection in a horizontal porous cavity of aspect ratio A = 5 and heated from below are reported. A wide range of governing parameters are covered by careful selection of bead size, solid material, and fluid. These results fully support the effects of fluid-flow parameters (Rayleigh and Prandtl numbers), porous matrix-structure parameters (Darcy and Forchheimer numbers), and the conductivity ratio as predicted by the formulation based on the Darcy-Brinkman-Forchheimer (DBF) equations of motion. The DBF flow model, with variable porosity and variable thermal conductivity in the wall regions, predicts reasonably well in comparison with the experimental data. However, the difference between the predictions and the measurements increases as the ratio of solid-to-fluid thermal conductivity becomes very large. 32 refs.

• OSTI ID: 6042259
• Journal Information: Journal of Thermophysics and Heat Transfer; (United States), Journal Name: Journal of Thermophysics and Heat Transfer; (United States) Vol. 5; ISSN 0887-8722; ISSN JTHTE
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
ASPECT RATIO
CONVECTION
DIFFERENTIAL EQUATIONS
ENERGY TRANSFER
EQUATIONS
EQUATIONS OF MOTION
FLUIDS
HEAT TRANSFER
INTERFACES
MASS TRANSFER
MATERIALS
MATHEMATICAL MODELS
NATURAL CONVECTION
PARTIAL DIFFERENTIAL EQUATIONS
PHYSICAL PROPERTIES
POROSITY
POROUS MATERIALS
PRANDTL NUMBER
SOLIDS
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
VERIFICATION