Study of double-diffusive convection in layered anisotropic porous media

Journal Article · Thu Dec 01 04:00:00 EST 1994 · Numerical Heat Transfer. Part B, Fundamentals; (United States)

DOI:https://doi.org/10.1080/10407799408914942· OSTI ID:6603806

Nguyen, H D; Paik, S; Douglass, R W ^[1]

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1. Idaho National Engineering Lab., Idaho Falls, ID (United States)

Natural convection induced by combined heat and mass transfer in an enclosure filled with two layers of anisotropic porous media saturated with a two-component fluid is investigated by means of numerical experiments. Darcy's law together with the energy and specie equations are solved by a domain decomposition and a pseudo-spectral method using Chebyshev polynomials as the basis functions. The interactions between the subdomains along the interface are decoupled by a superposition of elementary solutions. Four cases including aiding, opposing, cross diffusion with stabilizing, and destabilizing concentration fields are considered. The results show remarkable differences among the flow, temperature, and concentration fields. Depending on the orientation of the boundary conditions of the temperature and concentration fields, the overall heat transfer rates may or may not be sensitive to the Rayleigh numbers.

• DOE Contract Number: AC07-76ID01570
• OSTI ID: 6603806
• Journal Information: Numerical Heat Transfer. Part B, Fundamentals; (United States), Journal Name: Numerical Heat Transfer. Part B, Fundamentals; (United States) Vol. 26:4; ISSN 1040-7790; ISSN NHBFEE
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
CASTING
CAVITIES
CONVECTION
ENERGY TRANSFER
FABRICATION
GEOTHERMAL FIELDS
HEAT TRANSFER
MANAGEMENT
MASS TRANSFER
MATERIALS
NATURAL CONVECTION
POROUS MATERIALS
THERMAL INSULATION
WASTE DISPOSAL
WASTE MANAGEMENT