Thermal and concentration-induced instability in porous media

Conference · Fri Jan 01 04:00:00 EST 1993 · Transactions of the American Nuclear Society; (United States)

OSTI ID:7125898

Carter, J M; Islam, M R ^[1]

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1. South Dakota School of Mines and Technology, Rapid City, SD (United States)

Exothermic chemical reactions can influence natural convection effects in a porous medium. Such phenomena may occur in tubular reactors, oxidation of solid material in large containers, chemical vapor deposition systems, liquid explosives, and others. Experimental evidence indicates that the influence of natural convection in many chemically reacting systems cannot be neglected. In this work, transient effects of a two-dimensional convection generated and sustained by an endothermic chemical reaction and a constant heat flux are studied. The Darcy-Boussinesq equations are used to describe fluid flow through a porous medium with a first-order chemical reaction. The complete mass, energy, and momentum balance equations are solved with the Arakawa-Dufort Frankel numerical scheme, which is particularly suitable for stationary solutions over a range of various parameters.

• OSTI ID: 7125898
• Report Number(s): CONF-931160--
• Conference Information: Journal Name: Transactions of the American Nuclear Society; (United States) Journal Volume: 69
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
CALCULATION METHODS
CHEMICAL REACTIONS
CONVECTION
ENERGY TRANSFER
FLUID FLOW
FLUID MECHANICS
HEAT TRANSFER
MASS TRANSFER
MATERIALS
MECHANICS
NATURAL CONVECTION
POROUS MATERIALS
TWO-DIMENSIONAL CALCULATIONS