An analytical study on natural convection in isotropic and anisotropic porous channels

Journal Article · Tue May 01 00:00:00 EDT 1990 · Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States)

DOI:https://doi.org/10.1115/1.2910390· OSTI ID:6063544

Nilsen, T ^[1]; Storesletten, L ^[2]

---

1. Univ. of Bergen (Norway)
2. Agder Coll., Kristiansand (Norway)

This paper is an analytical study on natural two-dimensional convection in horizontal rectangular channels filled by isotropic and anisotropic porous media. The channel walls, assumed to be impermeable and perfectly heat conducting, are nonuniformly heated to establish a linear temperature distribution in the vertical direction. The authors derive the critical Rayleigh numbers for the onset of convection and examine the steady flow patterns at moderately supercritical Rayleigh numbers. The stability properties of these flow patterns are examined against two-dimensional perturbations using a weakly nonlinear theory.

• OSTI ID: 6063544
• 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. 112:2; ISSN 0022-1481; ISSN JHTRA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
ANISOTROPY
CONVECTION
DISTURBANCES
DUCTS
ENERGY STORAGE
ENERGY TRANSFER
GEOPHYSICS
HEAT TRANSFER
ISOTROPY
MASS TRANSFER
MATERIALS
NATURAL CONVECTION
ORIENTATION
POROUS MATERIALS
STABILITY
STORAGE
TEMPERATURE DISTRIBUTION