Application of flux-corrected transport (FCT) to high Rayleigh number natural convection in a porous medium

Conference · Wed Jan 01 04:00:00 EST 1986

OSTI ID:5536456

Gross, R J; Baer, M R; Hickox, C E

A numerical technique designed to solve a wide class of convectively dominated flow problems is applied to natural convective flow in a porous medium at large Rayleigh number. The technique is a finite difference method based on flux-corrected transport (FCT) and possesses four desirable numerical properties: stability, accuracy, monotonicity, and conservation. Steady natural convection is investigated for Rayleigh numbers as large as 10,000. An efficient methodology for obtaining steady state solutions is illustrated. A simulation is performed for transient thermal convection at a Rayleigh number of 2500. Transient natural convection involving both heat and mass transfer is illustrated for a Rayleigh number of 2500, Lewis number of 2, and buoyancy ratio of 0.1. All simulations are performed in a square cavity with heated vertical side walls. 17 refs.

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 5536456
• Report Number(s): SAND-85-1552C; CONF-860805-4; ON: DE86004603
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
CONVECTION
ENERGY TRANSFER
HEAT FLUX
HEAT TRANSFER
MASS TRANSFER
MATERIALS
MATHEMATICAL MODELS
NATURAL CONVECTION
POROUS MATERIALS
USES