Abstract
In many problems involving boiling in a porous medium, such as geothermal energy, meltdown in nuclear reactors, and heat pipes, the porous medium consists of single-phase (liquid) and two-phase (liquid + vapor) regions separated by a phase-change interface. Experimental evidence suggests that the phase-change interface is strongly influenced by liquid-phase natural convection and that liquid can flow in both directions across the interface. This paper describes a numerical scheme for problems involving boiling in a porous medium, including the effects of natural convection. The equations in the liquid region and the two-phase region are coupled by the dynamics of the phase-change interface. The present investigation represents the first attempt at obtaining numerical solutions in the liquid and two-phase regions, together with the position of the interface.
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