Summary
Two-phase thermal convection has been studied in a porous layer heated from below. A water saturated porous layer was heated so that boiling occurred on the lower boundary. In order to observe flow patterns one lateral dimension of the apparatus was made small. At moderate heat fluxes a water zone overlay a two-phase, steam-water zone. Water velocities and streamlines were obtained as well as the location of the two-phase zone for several heat fluxes. Within the water zone heat transfer took place due to both conduction and convection. In the two-phase zone heat transfer took place due to counterpercolation of steam and water.
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References
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Sondergeld, C.H., Turcotte, D.L. Flow visualization studies of two-phase thermal convection in a porous layer. PAGEOPH 117, 321–330 (1978). https://doi.org/10.1007/BF00879757
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DOI: https://doi.org/10.1007/BF00879757