Three-dimensional natural convection in a vertical porous layer with a hexagonal honeycomb core

Journal Article · Sun Nov 01 04:00:00 EST 1992 · Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States)

DOI:https://doi.org/10.1115/1.2911902· OSTI ID:5769389

Asako, Y; Nakamura, H; Yamaguchi, Y ^[1]; Faghri, M ^[2]

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1. Tokyo Metropolitan Univ., Tokyo (Japan)
2. Univ. of Rhode Island, Kingston, RI (United States)

Numerical solutions are obtained for a three-dimensional natural convection heat transfer problem in a vertical porous layer with a hexagonal honeycomb core. THe porous layer is assumed to be long and wide such that the velocity and temperature fields repeat themselfs in successive enclosures. The natural convection problems solved for only one honeycomb enclosure with periodic thermal boundary conditions. The porous layer is assumed to be homogeneous and isotropic and the flow is obtained by using the Darcian model. The numerical methodology is based an algebraic coordinate transformation technique, which maps the hexagonal cros section onto a rectangle. The transformed governing equations are solved with the SIMPLE algorithm. The calculations are performed for the Darcy-Rayleigh number in the range of 10 to 10[sup 3] and for eight values of the aspect ratio (H/L = 0.25, 0.333, 0.5, 0.7, 1, 1.4, 2, and 5). Two types of thermal boundary condition for the honeycomb core wall are considered: conduction and adiabatic honeycomb core wall thermal boundary conditions. The results are presented in the form of average and local heat transfer coefficients and are compared with the corresponding values for two and three-dimensional rectangular enclosures.

• OSTI ID: 5769389
• Journal Information: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States), Journal Name: Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States) Vol. 114:4; ISSN 0022-1481; ISSN JHTRAO
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
BOUNDARY LAYERS
COMPUTERIZED SIMULATION
CONVECTION
ENERGY TRANSFER
FLUID FLOW
HEAT FLUX
HEAT TRANSFER
LAYERS
MASS TRANSFER
MATERIALS
NATURAL CONVECTION
POROUS MATERIALS
SIMULATION
TEMPERATURE DISTRIBUTION
THERMAL ANALYSIS
TURBULENCE
TURBULENT FLOW